/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_1.cil-2+token_ring.12.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 08:19:33,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 08:19:33,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 08:19:33,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 08:19:33,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 08:19:33,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 08:19:33,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 08:19:33,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 08:19:33,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 08:19:33,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 08:19:33,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 08:19:33,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 08:19:33,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 08:19:33,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 08:19:33,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 08:19:33,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 08:19:33,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 08:19:33,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 08:19:33,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 08:19:33,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 08:19:33,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 08:19:33,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 08:19:33,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 08:19:33,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 08:19:33,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 08:19:33,144 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 08:19:33,144 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 08:19:33,145 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 08:19:33,145 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 08:19:33,146 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 08:19:33,146 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 08:19:33,146 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 08:19:33,148 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 08:19:33,148 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 08:19:33,149 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 08:19:33,149 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 08:19:33,150 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 08:19:33,150 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 08:19:33,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 08:19:33,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 08:19:33,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 08:19:33,151 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 08:19:33,178 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 08:19:33,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 08:19:33,178 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 08:19:33,179 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 08:19:33,179 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 08:19:33,179 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 08:19:33,180 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 08:19:33,180 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 08:19:33,180 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 08:19:33,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 08:19:33,181 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 08:19:33,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 08:19:33,181 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 08:19:33,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 08:19:33,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 08:19:33,181 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 08:19:33,181 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 08:19:33,181 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 08:19:33,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 08:19:33,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 08:19:33,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 08:19:33,182 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 08:19:33,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 08:19:33,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:19:33,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 08:19:33,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 08:19:33,183 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 08:19:33,183 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 08:19:33,183 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 08:19:33,183 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 08:19:33,183 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 08:19:33,183 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 08:19:33,183 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 08:19:33,183 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 08:19:33,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 08:19:33,392 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 08:19:33,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 08:19:33,394 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 08:19:33,395 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 08:19:33,395 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c [2022-01-10 08:19:33,439 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8db484a04/ef332b3fe59b49b3b794809894556157/FLAG04b395749 [2022-01-10 08:19:33,891 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 08:19:33,892 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c [2022-01-10 08:19:33,912 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8db484a04/ef332b3fe59b49b3b794809894556157/FLAG04b395749 [2022-01-10 08:19:34,418 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8db484a04/ef332b3fe59b49b3b794809894556157 [2022-01-10 08:19:34,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 08:19:34,425 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 08:19:34,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 08:19:34,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 08:19:34,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 08:19:34,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:19:34" (1/1) ... [2022-01-10 08:19:34,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e6531c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:34, skipping insertion in model container [2022-01-10 08:19:34,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:19:34" (1/1) ... [2022-01-10 08:19:34,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 08:19:34,532 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 08:19:34,681 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_1.cil-2+token_ring.12.cil-2.c[913,926] [2022-01-10 08:19:34,717 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_1.cil-2+token_ring.12.cil-2.c[5977,5990] [2022-01-10 08:19:34,821 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:19:34,834 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 08:19:34,843 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_1.cil-2+token_ring.12.cil-2.c[913,926] [2022-01-10 08:19:34,863 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_1.cil-2+token_ring.12.cil-2.c[5977,5990] [2022-01-10 08:19:34,913 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:19:34,932 INFO L208 MainTranslator]: Completed translation [2022-01-10 08:19:34,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:34 WrapperNode [2022-01-10 08:19:34,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 08:19:34,934 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 08:19:34,934 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 08:19:34,934 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 08:19:34,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:34" (1/1) ... [2022-01-10 08:19:34,958 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:34" (1/1) ... [2022-01-10 08:19:34,994 INFO L137 Inliner]: procedures = 73, calls = 84, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1014 [2022-01-10 08:19:34,995 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 08:19:34,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 08:19:34,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 08:19:34,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 08:19:35,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:34" (1/1) ... [2022-01-10 08:19:35,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:34" (1/1) ... [2022-01-10 08:19:35,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:34" (1/1) ... [2022-01-10 08:19:35,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:34" (1/1) ... [2022-01-10 08:19:35,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:34" (1/1) ... [2022-01-10 08:19:35,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:34" (1/1) ... [2022-01-10 08:19:35,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:34" (1/1) ... [2022-01-10 08:19:35,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 08:19:35,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 08:19:35,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 08:19:35,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 08:19:35,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:34" (1/1) ... [2022-01-10 08:19:35,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:19:35,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:19:35,148 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 08:19:35,207 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 08:19:35,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 08:19:35,215 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-01-10 08:19:35,215 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-01-10 08:19:35,215 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-01-10 08:19:35,215 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-01-10 08:19:35,216 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-01-10 08:19:35,217 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-01-10 08:19:35,217 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-01-10 08:19:35,217 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-01-10 08:19:35,217 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-01-10 08:19:35,217 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-01-10 08:19:35,217 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-01-10 08:19:35,217 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-01-10 08:19:35,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 08:19:35,217 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-01-10 08:19:35,217 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-01-10 08:19:35,217 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-01-10 08:19:35,217 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-01-10 08:19:35,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 08:19:35,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 08:19:35,218 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-01-10 08:19:35,218 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-01-10 08:19:35,348 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 08:19:35,349 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 08:19:36,030 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 08:19:36,038 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 08:19:36,039 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2022-01-10 08:19:36,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:19:36 BoogieIcfgContainer [2022-01-10 08:19:36,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 08:19:36,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 08:19:36,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 08:19:36,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 08:19:36,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:19:34" (1/3) ... [2022-01-10 08:19:36,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@194e3676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:19:36, skipping insertion in model container [2022-01-10 08:19:36,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:34" (2/3) ... [2022-01-10 08:19:36,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@194e3676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:19:36, skipping insertion in model container [2022-01-10 08:19:36,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:19:36" (3/3) ... [2022-01-10 08:19:36,051 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.12.cil-2.c [2022-01-10 08:19:36,055 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 08:19:36,055 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 08:19:36,104 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 08:19:36,109 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 08:19:36,109 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 08:19:36,135 INFO L276 IsEmpty]: Start isEmpty. Operand has 454 states, 410 states have (on average 1.648780487804878) internal successors, (676), 415 states have internal predecessors, (676), 32 states have call successors, (32), 9 states have call predecessors, (32), 9 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-01-10 08:19:36,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-10 08:19:36,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:36,142 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] [2022-01-10 08:19:36,143 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:36,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:36,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1427645478, now seen corresponding path program 1 times [2022-01-10 08:19:36,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:36,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1150641757] [2022-01-10 08:19:36,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:36,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:36,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:36,161 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 08:19:36,195 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 08:19:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:36,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:19:36,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:36,388 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 08:19:36,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:36,388 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:36,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1150641757] [2022-01-10 08:19:36,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1150641757] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:36,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:36,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:19:36,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814269996] [2022-01-10 08:19:36,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:36,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:19:36,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:36,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:19:36,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:36,417 INFO L87 Difference]: Start difference. First operand has 454 states, 410 states have (on average 1.648780487804878) internal successors, (676), 415 states have internal predecessors, (676), 32 states have call successors, (32), 9 states have call predecessors, (32), 9 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 08:19:36,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:36,531 INFO L93 Difference]: Finished difference Result 942 states and 1532 transitions. [2022-01-10 08:19:36,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:19:36,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-01-10 08:19:36,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:36,554 INFO L225 Difference]: With dead ends: 942 [2022-01-10 08:19:36,555 INFO L226 Difference]: Without dead ends: 503 [2022-01-10 08:19:36,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 42 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 08:19:36,564 INFO L933 BasicCegarLoop]: 713 mSDtfsCounter, 678 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:36,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 798 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:36,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-01-10 08:19:36,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 499. [2022-01-10 08:19:36,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 451 states have (on average 1.5343680709534369) internal successors, (692), 454 states have internal predecessors, (692), 36 states have call successors, (36), 11 states have call predecessors, (36), 10 states have return successors, (38), 34 states have call predecessors, (38), 34 states have call successors, (38) [2022-01-10 08:19:36,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 766 transitions. [2022-01-10 08:19:36,632 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 766 transitions. Word has length 44 [2022-01-10 08:19:36,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:36,632 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 766 transitions. [2022-01-10 08:19:36,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 08:19:36,632 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 766 transitions. [2022-01-10 08:19:36,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 08:19:36,635 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:36,635 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] [2022-01-10 08:19:36,645 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 08:19:36,847 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 08:19:36,847 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:36,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:36,848 INFO L85 PathProgramCache]: Analyzing trace with hash 2087439571, now seen corresponding path program 1 times [2022-01-10 08:19:36,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:36,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304614126] [2022-01-10 08:19:36,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:36,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:36,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:36,850 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 08:19:36,852 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 08:19:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:36,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:19:36,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:36,995 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 08:19:36,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:36,995 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:36,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304614126] [2022-01-10 08:19:36,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304614126] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:36,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:36,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:19:36,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960142230] [2022-01-10 08:19:36,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:36,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:19:36,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:36,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:19:36,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:36,998 INFO L87 Difference]: Start difference. First operand 499 states and 766 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 08:19:37,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:37,027 INFO L93 Difference]: Finished difference Result 707 states and 1054 transitions. [2022-01-10 08:19:37,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:19:37,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-01-10 08:19:37,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:37,030 INFO L225 Difference]: With dead ends: 707 [2022-01-10 08:19:37,030 INFO L226 Difference]: Without dead ends: 592 [2022-01-10 08:19:37,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 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 08:19:37,031 INFO L933 BasicCegarLoop]: 715 mSDtfsCounter, 62 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:37,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1378 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:37,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-01-10 08:19:37,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 566. [2022-01-10 08:19:37,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 512 states have (on average 1.515625) internal successors, (776), 515 states have internal predecessors, (776), 39 states have call successors, (39), 14 states have call predecessors, (39), 13 states have return successors, (42), 37 states have call predecessors, (42), 37 states have call successors, (42) [2022-01-10 08:19:37,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 857 transitions. [2022-01-10 08:19:37,053 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 857 transitions. Word has length 45 [2022-01-10 08:19:37,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:37,054 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 857 transitions. [2022-01-10 08:19:37,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 08:19:37,054 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 857 transitions. [2022-01-10 08:19:37,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 08:19:37,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:37,055 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] [2022-01-10 08:19:37,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:37,262 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 08:19:37,263 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:37,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:37,263 INFO L85 PathProgramCache]: Analyzing trace with hash 803082110, now seen corresponding path program 1 times [2022-01-10 08:19:37,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:37,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380199291] [2022-01-10 08:19:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:37,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:37,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:37,268 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 08:19:37,269 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 08:19:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:37,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:19:37,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:19:37,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:37,399 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:37,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380199291] [2022-01-10 08:19:37,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380199291] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:37,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:37,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:19:37,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295424236] [2022-01-10 08:19:37,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:37,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:19:37,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:37,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:19:37,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:37,401 INFO L87 Difference]: Start difference. First operand 566 states and 857 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 08:19:37,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:37,427 INFO L93 Difference]: Finished difference Result 919 states and 1345 transitions. [2022-01-10 08:19:37,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:19:37,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-01-10 08:19:37,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:37,430 INFO L225 Difference]: With dead ends: 919 [2022-01-10 08:19:37,430 INFO L226 Difference]: Without dead ends: 737 [2022-01-10 08:19:37,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 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 08:19:37,431 INFO L933 BasicCegarLoop]: 700 mSDtfsCounter, 658 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:37,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 778 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:37,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-01-10 08:19:37,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 723. [2022-01-10 08:19:37,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 651 states have (on average 1.4715821812596006) internal successors, (958), 656 states have internal predecessors, (958), 50 states have call successors, (50), 21 states have call predecessors, (50), 20 states have return successors, (58), 46 states have call predecessors, (58), 48 states have call successors, (58) [2022-01-10 08:19:37,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1066 transitions. [2022-01-10 08:19:37,451 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1066 transitions. Word has length 45 [2022-01-10 08:19:37,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:37,452 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 1066 transitions. [2022-01-10 08:19:37,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 08:19:37,452 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1066 transitions. [2022-01-10 08:19:37,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-10 08:19:37,454 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:37,454 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] [2022-01-10 08:19:37,463 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 08:19:37,661 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 08:19:37,663 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:37,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:37,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1436949354, now seen corresponding path program 1 times [2022-01-10 08:19:37,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:37,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28123678] [2022-01-10 08:19:37,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:37,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:37,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:37,665 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 08:19:37,667 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 08:19:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:37,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:19:37,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:37,843 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 08:19:37,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:37,844 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:37,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [28123678] [2022-01-10 08:19:37,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [28123678] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:37,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:37,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:19:37,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22670450] [2022-01-10 08:19:37,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:37,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:19:37,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:37,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:19:37,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:37,845 INFO L87 Difference]: Start difference. First operand 723 states and 1066 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 08:19:37,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:37,889 INFO L93 Difference]: Finished difference Result 1235 states and 1763 transitions. [2022-01-10 08:19:37,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:19:37,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2022-01-10 08:19:37,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:37,895 INFO L225 Difference]: With dead ends: 1235 [2022-01-10 08:19:37,895 INFO L226 Difference]: Without dead ends: 896 [2022-01-10 08:19:37,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 60 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 08:19:37,900 INFO L933 BasicCegarLoop]: 746 mSDtfsCounter, 50 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:37,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1424 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:37,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-01-10 08:19:37,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 896. [2022-01-10 08:19:37,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 802 states have (on average 1.4201995012468829) internal successors, (1139), 807 states have internal predecessors, (1139), 64 states have call successors, (64), 29 states have call predecessors, (64), 28 states have return successors, (80), 60 states have call predecessors, (80), 62 states have call successors, (80) [2022-01-10 08:19:37,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1283 transitions. [2022-01-10 08:19:37,942 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1283 transitions. Word has length 62 [2022-01-10 08:19:37,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:37,943 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 1283 transitions. [2022-01-10 08:19:37,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 08:19:37,943 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1283 transitions. [2022-01-10 08:19:37,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 08:19:37,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:37,949 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] [2022-01-10 08:19:37,958 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 08:19:38,156 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 08:19:38,156 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:38,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:38,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1474560009, now seen corresponding path program 1 times [2022-01-10 08:19:38,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:38,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439896381] [2022-01-10 08:19:38,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:38,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:38,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:38,162 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 08:19:38,164 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 08:19:38,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:38,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:19:38,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-10 08:19:38,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:38,395 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:38,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439896381] [2022-01-10 08:19:38,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439896381] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:38,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:38,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:19:38,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724815859] [2022-01-10 08:19:38,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:38,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:19:38,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:38,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:19:38,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:38,397 INFO L87 Difference]: Start difference. First operand 896 states and 1283 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 08:19:38,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:38,430 INFO L93 Difference]: Finished difference Result 1443 states and 2004 transitions. [2022-01-10 08:19:38,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:19:38,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-01-10 08:19:38,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:38,435 INFO L225 Difference]: With dead ends: 1443 [2022-01-10 08:19:38,435 INFO L226 Difference]: Without dead ends: 1023 [2022-01-10 08:19:38,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 65 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 08:19:38,437 INFO L933 BasicCegarLoop]: 695 mSDtfsCounter, 645 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:38,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 773 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:38,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2022-01-10 08:19:38,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 1023. [2022-01-10 08:19:38,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 915 states have (on average 1.389071038251366) internal successors, (1271), 920 states have internal predecessors, (1271), 72 states have call successors, (72), 35 states have call predecessors, (72), 34 states have return successors, (92), 68 states have call predecessors, (92), 70 states have call successors, (92) [2022-01-10 08:19:38,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1435 transitions. [2022-01-10 08:19:38,472 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1435 transitions. Word has length 67 [2022-01-10 08:19:38,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:38,473 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 1435 transitions. [2022-01-10 08:19:38,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 08:19:38,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1435 transitions. [2022-01-10 08:19:38,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 08:19:38,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:38,474 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] [2022-01-10 08:19:38,483 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 08:19:38,681 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 08:19:38,681 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:38,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:38,682 INFO L85 PathProgramCache]: Analyzing trace with hash 132320028, now seen corresponding path program 1 times [2022-01-10 08:19:38,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:38,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691294302] [2022-01-10 08:19:38,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:38,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:38,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:38,684 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 08:19:38,685 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 08:19:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:38,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:38,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 08:19:38,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:38,847 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:38,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691294302] [2022-01-10 08:19:38,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691294302] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:38,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:38,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:19:38,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616082675] [2022-01-10 08:19:38,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:38,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:38,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:38,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:38,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:38,849 INFO L87 Difference]: Start difference. First operand 1023 states and 1435 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 08:19:38,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:38,895 INFO L93 Difference]: Finished difference Result 1660 states and 2280 transitions. [2022-01-10 08:19:38,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:19:38,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-01-10 08:19:38,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:38,900 INFO L225 Difference]: With dead ends: 1660 [2022-01-10 08:19:38,900 INFO L226 Difference]: Without dead ends: 1166 [2022-01-10 08:19:38,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:19:38,901 INFO L933 BasicCegarLoop]: 687 mSDtfsCounter, 50 mSDsluCounter, 2080 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2767 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:38,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 2767 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:38,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2022-01-10 08:19:38,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 1064. [2022-01-10 08:19:38,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 954 states have (on average 1.3731656184486374) internal successors, (1310), 961 states have internal predecessors, (1310), 72 states have call successors, (72), 35 states have call predecessors, (72), 36 states have return successors, (94), 68 states have call predecessors, (94), 70 states have call successors, (94) [2022-01-10 08:19:38,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1476 transitions. [2022-01-10 08:19:38,971 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1476 transitions. Word has length 68 [2022-01-10 08:19:38,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:38,971 INFO L470 AbstractCegarLoop]: Abstraction has 1064 states and 1476 transitions. [2022-01-10 08:19:38,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 08:19:38,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1476 transitions. [2022-01-10 08:19:38,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 08:19:38,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:38,973 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:19:38,988 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 08:19:39,179 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 08:19:39,180 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:39,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:39,180 INFO L85 PathProgramCache]: Analyzing trace with hash -897039270, now seen corresponding path program 1 times [2022-01-10 08:19:39,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:39,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983302897] [2022-01-10 08:19:39,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:39,181 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:39,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:39,182 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 08:19:39,183 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 08:19:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:39,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:39,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 08:19:39,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:39,340 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:39,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983302897] [2022-01-10 08:19:39,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983302897] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:39,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:39,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:19:39,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571879125] [2022-01-10 08:19:39,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:39,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:39,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:39,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:39,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:39,342 INFO L87 Difference]: Start difference. First operand 1064 states and 1476 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 08:19:39,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:39,384 INFO L93 Difference]: Finished difference Result 1557 states and 2122 transitions. [2022-01-10 08:19:39,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:19:39,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-01-10 08:19:39,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:39,388 INFO L225 Difference]: With dead ends: 1557 [2022-01-10 08:19:39,388 INFO L226 Difference]: Without dead ends: 975 [2022-01-10 08:19:39,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:19:39,390 INFO L933 BasicCegarLoop]: 685 mSDtfsCounter, 10 mSDsluCounter, 2054 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2739 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:39,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 2739 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:39,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-01-10 08:19:39,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 955. [2022-01-10 08:19:39,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 859 states have (on average 1.379511059371362) internal successors, (1185), 868 states have internal predecessors, (1185), 62 states have call successors, (62), 29 states have call predecessors, (62), 32 states have return successors, (80), 58 states have call predecessors, (80), 60 states have call successors, (80) [2022-01-10 08:19:39,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1327 transitions. [2022-01-10 08:19:39,416 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1327 transitions. Word has length 68 [2022-01-10 08:19:39,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:39,416 INFO L470 AbstractCegarLoop]: Abstraction has 955 states and 1327 transitions. [2022-01-10 08:19:39,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 08:19:39,416 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1327 transitions. [2022-01-10 08:19:39,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 08:19:39,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:39,417 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:19:39,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-01-10 08:19:39,624 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 08:19:39,624 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:39,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:39,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1152727706, now seen corresponding path program 1 times [2022-01-10 08:19:39,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:39,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [892773938] [2022-01-10 08:19:39,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:39,625 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:39,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:39,626 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 08:19:39,628 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 08:19:39,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:39,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:39,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:19:39,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:19:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 08:19:39,925 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:39,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [892773938] [2022-01-10 08:19:39,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [892773938] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 08:19:39,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 08:19:39,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-01-10 08:19:39,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476688361] [2022-01-10 08:19:39,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:39,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:19:39,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:39,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:19:39,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:19:39,926 INFO L87 Difference]: Start difference. First operand 955 states and 1327 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 08:19:40,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:40,057 INFO L93 Difference]: Finished difference Result 1010 states and 1394 transitions. [2022-01-10 08:19:40,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:19:40,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-01-10 08:19:40,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:40,061 INFO L225 Difference]: With dead ends: 1010 [2022-01-10 08:19:40,061 INFO L226 Difference]: Without dead ends: 1007 [2022-01-10 08:19:40,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 133 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 08:19:40,062 INFO L933 BasicCegarLoop]: 711 mSDtfsCounter, 1258 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1258 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:40,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1258 Valid, 778 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:19:40,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2022-01-10 08:19:40,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 954. [2022-01-10 08:19:40,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 859 states have (on average 1.3771827706635622) internal successors, (1183), 867 states have internal predecessors, (1183), 61 states have call successors, (61), 29 states have call predecessors, (61), 32 states have return successors, (80), 58 states have call predecessors, (80), 60 states have call successors, (80) [2022-01-10 08:19:40,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1324 transitions. [2022-01-10 08:19:40,093 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1324 transitions. Word has length 68 [2022-01-10 08:19:40,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:40,094 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 1324 transitions. [2022-01-10 08:19:40,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 08:19:40,094 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1324 transitions. [2022-01-10 08:19:40,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 08:19:40,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:40,095 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 08:19:40,117 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 08:19:40,304 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 08:19:40,304 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:40,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:40,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1373427356, now seen corresponding path program 1 times [2022-01-10 08:19:40,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:40,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518052471] [2022-01-10 08:19:40,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:40,305 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:40,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:40,306 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 08:19:40,307 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 08:19:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:40,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:19:40,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:19:40,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:19:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 08:19:40,815 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:40,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518052471] [2022-01-10 08:19:40,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518052471] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:19:40,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 08:19:40,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2022-01-10 08:19:40,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517927645] [2022-01-10 08:19:40,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 08:19:40,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 08:19:40,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:40,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 08:19:40,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:19:40,817 INFO L87 Difference]: Start difference. First operand 954 states and 1324 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 6 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-10 08:19:41,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:41,043 INFO L93 Difference]: Finished difference Result 1777 states and 2366 transitions. [2022-01-10 08:19:41,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:19:41,044 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 6 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 69 [2022-01-10 08:19:41,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:41,049 INFO L225 Difference]: With dead ends: 1777 [2022-01-10 08:19:41,049 INFO L226 Difference]: Without dead ends: 1774 [2022-01-10 08:19:41,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:19:41,050 INFO L933 BasicCegarLoop]: 789 mSDtfsCounter, 892 mSDsluCounter, 1645 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 2434 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:41,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [892 Valid, 2434 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:19:41,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1774 states. [2022-01-10 08:19:41,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1774 to 1303. [2022-01-10 08:19:41,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1172 states have (on average 1.3438566552901023) internal successors, (1575), 1186 states have internal predecessors, (1575), 80 states have call successors, (80), 42 states have call predecessors, (80), 49 states have return successors, (111), 75 states have call predecessors, (111), 79 states have call successors, (111) [2022-01-10 08:19:41,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 1766 transitions. [2022-01-10 08:19:41,130 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 1766 transitions. Word has length 69 [2022-01-10 08:19:41,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:41,131 INFO L470 AbstractCegarLoop]: Abstraction has 1303 states and 1766 transitions. [2022-01-10 08:19:41,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 6 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-10 08:19:41,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 1766 transitions. [2022-01-10 08:19:41,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-10 08:19:41,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:41,133 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:19:41,141 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 08:19:41,339 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 08:19:41,340 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:41,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:41,340 INFO L85 PathProgramCache]: Analyzing trace with hash -283267080, now seen corresponding path program 2 times [2022-01-10 08:19:41,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:41,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168480549] [2022-01-10 08:19:41,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 08:19:41,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:41,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:41,342 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 08:19:41,348 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 08:19:41,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 08:19:41,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 08:19:41,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:19:41,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 08:19:41,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:41,574 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:41,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168480549] [2022-01-10 08:19:41,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [168480549] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:41,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:41,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:19:41,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173171145] [2022-01-10 08:19:41,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:41,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:19:41,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:41,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:19:41,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:41,576 INFO L87 Difference]: Start difference. First operand 1303 states and 1766 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 08:19:41,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:41,635 INFO L93 Difference]: Finished difference Result 1944 states and 2583 transitions. [2022-01-10 08:19:41,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:19:41,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2022-01-10 08:19:41,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:41,640 INFO L225 Difference]: With dead ends: 1944 [2022-01-10 08:19:41,640 INFO L226 Difference]: Without dead ends: 1193 [2022-01-10 08:19:41,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 86 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 08:19:41,643 INFO L933 BasicCegarLoop]: 718 mSDtfsCounter, 648 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:41,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 792 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:41,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2022-01-10 08:19:41,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1181. [2022-01-10 08:19:41,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1063 states have (on average 1.348071495766698) internal successors, (1433), 1077 states have internal predecessors, (1433), 73 states have call successors, (73), 37 states have call predecessors, (73), 43 states have return successors, (100), 67 states have call predecessors, (100), 72 states have call successors, (100) [2022-01-10 08:19:41,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1606 transitions. [2022-01-10 08:19:41,699 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1606 transitions. Word has length 88 [2022-01-10 08:19:41,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:41,699 INFO L470 AbstractCegarLoop]: Abstraction has 1181 states and 1606 transitions. [2022-01-10 08:19:41,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 08:19:41,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1606 transitions. [2022-01-10 08:19:41,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-10 08:19:41,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:41,703 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 08:19:41,729 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 08:19:41,912 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 08:19:41,914 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:41,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:41,914 INFO L85 PathProgramCache]: Analyzing trace with hash -541395891, now seen corresponding path program 1 times [2022-01-10 08:19:41,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:41,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [114915566] [2022-01-10 08:19:41,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:41,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:41,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:41,918 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 08:19:41,918 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 08:19:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:42,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:42,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 08:19:42,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:42,181 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:42,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [114915566] [2022-01-10 08:19:42,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [114915566] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:42,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:42,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:42,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871278282] [2022-01-10 08:19:42,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:42,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:19:42,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:42,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:19:42,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:19:42,183 INFO L87 Difference]: Start difference. First operand 1181 states and 1606 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 08:19:42,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:42,365 INFO L93 Difference]: Finished difference Result 2011 states and 2653 transitions. [2022-01-10 08:19:42,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:19:42,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 103 [2022-01-10 08:19:42,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:42,369 INFO L225 Difference]: With dead ends: 2011 [2022-01-10 08:19:42,369 INFO L226 Difference]: Without dead ends: 1214 [2022-01-10 08:19:42,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 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 08:19:42,371 INFO L933 BasicCegarLoop]: 674 mSDtfsCounter, 909 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:42,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [935 Valid, 1066 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:19:42,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2022-01-10 08:19:42,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1181. [2022-01-10 08:19:42,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1063 states have (on average 1.3339604891815615) internal successors, (1418), 1077 states have internal predecessors, (1418), 73 states have call successors, (73), 37 states have call predecessors, (73), 43 states have return successors, (99), 67 states have call predecessors, (99), 72 states have call successors, (99) [2022-01-10 08:19:42,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1590 transitions. [2022-01-10 08:19:42,404 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1590 transitions. Word has length 103 [2022-01-10 08:19:42,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:42,404 INFO L470 AbstractCegarLoop]: Abstraction has 1181 states and 1590 transitions. [2022-01-10 08:19:42,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 08:19:42,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1590 transitions. [2022-01-10 08:19:42,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-10 08:19:42,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:42,406 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 08:19:42,426 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 08:19:42,613 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 08:19:42,613 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:42,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:42,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1396964367, now seen corresponding path program 1 times [2022-01-10 08:19:42,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:42,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100069819] [2022-01-10 08:19:42,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:42,614 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:42,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:42,615 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 08:19:42,617 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 08:19:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:42,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:19:42,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:42,827 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 08:19:42,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:42,828 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:42,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100069819] [2022-01-10 08:19:42,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100069819] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:42,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:42,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:19:42,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468661701] [2022-01-10 08:19:42,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:42,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:19:42,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:42,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:19:42,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:42,829 INFO L87 Difference]: Start difference. First operand 1181 states and 1590 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 08:19:42,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:42,862 INFO L93 Difference]: Finished difference Result 1505 states and 1982 transitions. [2022-01-10 08:19:42,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:19:42,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 104 [2022-01-10 08:19:42,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:42,868 INFO L225 Difference]: With dead ends: 1505 [2022-01-10 08:19:42,868 INFO L226 Difference]: Without dead ends: 378 [2022-01-10 08:19:42,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 102 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 08:19:42,870 INFO L933 BasicCegarLoop]: 731 mSDtfsCounter, 55 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 1393 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:42,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 1393 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:42,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-01-10 08:19:42,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2022-01-10 08:19:42,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 345 states have (on average 1.5768115942028986) internal successors, (544), 346 states have internal predecessors, (544), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-10 08:19:42,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 596 transitions. [2022-01-10 08:19:42,892 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 596 transitions. Word has length 104 [2022-01-10 08:19:42,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:42,893 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 596 transitions. [2022-01-10 08:19:42,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 08:19:42,893 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 596 transitions. [2022-01-10 08:19:42,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:19:42,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:42,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:19:42,917 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 08:19:43,101 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 08:19:43,101 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:43,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:43,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1582396628, now seen corresponding path program 1 times [2022-01-10 08:19:43,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:43,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460737240] [2022-01-10 08:19:43,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:43,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:43,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:43,104 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 08:19:43,105 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 08:19:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:43,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:19:43,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:43,512 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 08:19:43,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:43,512 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:43,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460737240] [2022-01-10 08:19:43,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460737240] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:43,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:43,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:19:43,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970030405] [2022-01-10 08:19:43,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:43,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:19:43,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:43,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:19:43,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:43,514 INFO L87 Difference]: Start difference. First operand 378 states and 596 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:43,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:43,529 INFO L93 Difference]: Finished difference Result 749 states and 1183 transitions. [2022-01-10 08:19:43,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:19:43,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:19:43,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:43,531 INFO L225 Difference]: With dead ends: 749 [2022-01-10 08:19:43,531 INFO L226 Difference]: Without dead ends: 378 [2022-01-10 08:19:43,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 176 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 08:19:43,532 INFO L933 BasicCegarLoop]: 594 mSDtfsCounter, 587 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 595 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 08:19:43,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [587 Valid, 595 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:43,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-01-10 08:19:43,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2022-01-10 08:19:43,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 345 states have (on average 1.5739130434782609) internal successors, (543), 346 states have internal predecessors, (543), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-10 08:19:43,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 595 transitions. [2022-01-10 08:19:43,541 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 595 transitions. Word has length 178 [2022-01-10 08:19:43,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:43,541 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 595 transitions. [2022-01-10 08:19:43,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:43,542 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 595 transitions. [2022-01-10 08:19:43,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:19:43,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:43,543 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:19:43,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-01-10 08:19:43,751 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 08:19:43,752 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:43,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:43,752 INFO L85 PathProgramCache]: Analyzing trace with hash -79298322, now seen corresponding path program 1 times [2022-01-10 08:19:43,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:43,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267155548] [2022-01-10 08:19:43,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:43,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:43,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:43,760 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 08:19:43,762 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 08:19:43,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:43,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:19:43,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:44,116 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 08:19:44,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:44,116 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:44,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267155548] [2022-01-10 08:19:44,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267155548] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:44,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:44,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:19:44,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873638203] [2022-01-10 08:19:44,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:44,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:19:44,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:44,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:19:44,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:44,118 INFO L87 Difference]: Start difference. First operand 378 states and 595 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:44,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:44,134 INFO L93 Difference]: Finished difference Result 741 states and 1166 transitions. [2022-01-10 08:19:44,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:19:44,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:19:44,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:44,153 INFO L225 Difference]: With dead ends: 741 [2022-01-10 08:19:44,153 INFO L226 Difference]: Without dead ends: 378 [2022-01-10 08:19:44,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 176 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 08:19:44,154 INFO L933 BasicCegarLoop]: 593 mSDtfsCounter, 578 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 594 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 08:19:44,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 594 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:44,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-01-10 08:19:44,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2022-01-10 08:19:44,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 345 states have (on average 1.5710144927536231) internal successors, (542), 346 states have internal predecessors, (542), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-10 08:19:44,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 594 transitions. [2022-01-10 08:19:44,180 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 594 transitions. Word has length 178 [2022-01-10 08:19:44,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:44,180 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 594 transitions. [2022-01-10 08:19:44,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:44,180 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 594 transitions. [2022-01-10 08:19:44,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:19:44,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:44,181 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:19:44,203 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 08:19:44,390 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 08:19:44,390 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:44,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:44,391 INFO L85 PathProgramCache]: Analyzing trace with hash -649570128, now seen corresponding path program 1 times [2022-01-10 08:19:44,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:44,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202511333] [2022-01-10 08:19:44,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:44,391 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:44,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:44,408 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 08:19:44,471 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 08:19:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:44,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:44,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:44,830 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 08:19:44,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:44,831 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:44,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202511333] [2022-01-10 08:19:44,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202511333] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:44,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:44,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:44,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555676670] [2022-01-10 08:19:44,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:44,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:44,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:44,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:44,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:44,832 INFO L87 Difference]: Start difference. First operand 378 states and 594 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:45,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:45,388 INFO L93 Difference]: Finished difference Result 1140 states and 1812 transitions. [2022-01-10 08:19:45,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:19:45,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:19:45,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:45,392 INFO L225 Difference]: With dead ends: 1140 [2022-01-10 08:19:45,392 INFO L226 Difference]: Without dead ends: 783 [2022-01-10 08:19:45,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 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 08:19:45,394 INFO L933 BasicCegarLoop]: 695 mSDtfsCounter, 1147 mSDsluCounter, 1283 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1167 SdHoareTripleChecker+Valid, 1978 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:45,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1167 Valid, 1978 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 08:19:45,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-01-10 08:19:45,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 754. [2022-01-10 08:19:45,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 693 states have (on average 1.5844155844155845) internal successors, (1098), 695 states have internal predecessors, (1098), 47 states have call successors, (47), 12 states have call predecessors, (47), 13 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2022-01-10 08:19:45,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1193 transitions. [2022-01-10 08:19:45,415 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1193 transitions. Word has length 178 [2022-01-10 08:19:45,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:45,415 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1193 transitions. [2022-01-10 08:19:45,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:45,415 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1193 transitions. [2022-01-10 08:19:45,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:19:45,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:45,416 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:19:45,427 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 08:19:45,625 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 08:19:45,625 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:45,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:45,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1525555404, now seen corresponding path program 1 times [2022-01-10 08:19:45,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:45,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789192754] [2022-01-10 08:19:45,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:45,626 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:45,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:45,627 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 08:19:45,629 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 08:19:45,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:45,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:45,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:45,998 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 08:19:45,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:45,999 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:45,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789192754] [2022-01-10 08:19:45,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789192754] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:45,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:45,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:45,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236156832] [2022-01-10 08:19:45,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:45,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:45,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:46,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:46,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:46,000 INFO L87 Difference]: Start difference. First operand 754 states and 1193 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:46,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:46,291 INFO L93 Difference]: Finished difference Result 1487 states and 2359 transitions. [2022-01-10 08:19:46,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:19:46,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:19:46,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:46,294 INFO L225 Difference]: With dead ends: 1487 [2022-01-10 08:19:46,294 INFO L226 Difference]: Without dead ends: 754 [2022-01-10 08:19:46,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 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 08:19:46,297 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 808 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:46,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [828 Valid, 1207 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:19:46,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-01-10 08:19:46,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2022-01-10 08:19:46,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 693 states have (on average 1.5743145743145743) internal successors, (1091), 695 states have internal predecessors, (1091), 47 states have call successors, (47), 12 states have call predecessors, (47), 13 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2022-01-10 08:19:46,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1186 transitions. [2022-01-10 08:19:46,315 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1186 transitions. Word has length 178 [2022-01-10 08:19:46,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:46,315 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1186 transitions. [2022-01-10 08:19:46,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:46,315 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1186 transitions. [2022-01-10 08:19:46,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:19:46,316 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:46,316 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:19:46,324 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 08:19:46,524 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 08:19:46,525 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:46,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:46,525 INFO L85 PathProgramCache]: Analyzing trace with hash 108754992, now seen corresponding path program 1 times [2022-01-10 08:19:46,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:46,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1719896418] [2022-01-10 08:19:46,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:46,526 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:46,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:46,527 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 08:19:46,528 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 08:19:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:46,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:46,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:46,862 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 08:19:46,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:46,863 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:46,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1719896418] [2022-01-10 08:19:46,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1719896418] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:46,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:46,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:46,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319117609] [2022-01-10 08:19:46,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:46,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:46,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:46,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:46,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:46,864 INFO L87 Difference]: Start difference. First operand 754 states and 1186 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:47,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:47,158 INFO L93 Difference]: Finished difference Result 1487 states and 2345 transitions. [2022-01-10 08:19:47,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:19:47,159 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:19:47,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:47,161 INFO L225 Difference]: With dead ends: 1487 [2022-01-10 08:19:47,161 INFO L226 Difference]: Without dead ends: 754 [2022-01-10 08:19:47,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 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 08:19:47,163 INFO L933 BasicCegarLoop]: 559 mSDtfsCounter, 801 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:47,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 1200 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:19:47,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-01-10 08:19:47,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2022-01-10 08:19:47,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 693 states have (on average 1.5642135642135642) internal successors, (1084), 695 states have internal predecessors, (1084), 47 states have call successors, (47), 12 states have call predecessors, (47), 13 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2022-01-10 08:19:47,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1179 transitions. [2022-01-10 08:19:47,181 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1179 transitions. Word has length 178 [2022-01-10 08:19:47,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:47,181 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1179 transitions. [2022-01-10 08:19:47,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:47,181 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1179 transitions. [2022-01-10 08:19:47,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:19:47,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:47,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:19:47,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:47,391 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 08:19:47,391 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:47,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:47,392 INFO L85 PathProgramCache]: Analyzing trace with hash -2043731924, now seen corresponding path program 1 times [2022-01-10 08:19:47,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:47,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1636470944] [2022-01-10 08:19:47,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:47,392 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:47,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:47,394 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 08:19:47,395 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 08:19:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:47,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:47,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:19:47,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:47,796 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:47,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1636470944] [2022-01-10 08:19:47,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1636470944] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:47,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:47,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:47,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670727719] [2022-01-10 08:19:47,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:47,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:47,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:47,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:47,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:47,798 INFO L87 Difference]: Start difference. First operand 754 states and 1179 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:48,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:48,097 INFO L93 Difference]: Finished difference Result 1487 states and 2331 transitions. [2022-01-10 08:19:48,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:19:48,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:19:48,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:48,100 INFO L225 Difference]: With dead ends: 1487 [2022-01-10 08:19:48,100 INFO L226 Difference]: Without dead ends: 754 [2022-01-10 08:19:48,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 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 08:19:48,101 INFO L933 BasicCegarLoop]: 556 mSDtfsCounter, 795 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:48,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [815 Valid, 1193 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:19:48,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-01-10 08:19:48,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2022-01-10 08:19:48,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 693 states have (on average 1.5541125541125542) internal successors, (1077), 695 states have internal predecessors, (1077), 47 states have call successors, (47), 12 states have call predecessors, (47), 13 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2022-01-10 08:19:48,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1172 transitions. [2022-01-10 08:19:48,119 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1172 transitions. Word has length 178 [2022-01-10 08:19:48,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:48,119 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1172 transitions. [2022-01-10 08:19:48,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:48,120 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1172 transitions. [2022-01-10 08:19:48,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:19:48,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:48,121 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:19:48,129 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 08:19:48,329 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 08:19:48,329 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:48,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:48,330 INFO L85 PathProgramCache]: Analyzing trace with hash -173504336, now seen corresponding path program 1 times [2022-01-10 08:19:48,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:48,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212134010] [2022-01-10 08:19:48,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:48,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:48,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:48,352 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 08:19:48,390 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 08:19:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:48,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:48,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:48,702 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 08:19:48,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:48,702 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:48,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212134010] [2022-01-10 08:19:48,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212134010] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:48,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:48,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:48,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970351251] [2022-01-10 08:19:48,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:48,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:48,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:48,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:48,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:48,703 INFO L87 Difference]: Start difference. First operand 754 states and 1172 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:48,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:48,997 INFO L93 Difference]: Finished difference Result 1487 states and 2317 transitions. [2022-01-10 08:19:48,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:19:48,997 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:19:48,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:49,000 INFO L225 Difference]: With dead ends: 1487 [2022-01-10 08:19:49,000 INFO L226 Difference]: Without dead ends: 754 [2022-01-10 08:19:49,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 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 08:19:49,004 INFO L933 BasicCegarLoop]: 553 mSDtfsCounter, 789 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:49,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [809 Valid, 1186 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:19:49,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-01-10 08:19:49,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2022-01-10 08:19:49,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 693 states have (on average 1.544011544011544) internal successors, (1070), 695 states have internal predecessors, (1070), 47 states have call successors, (47), 12 states have call predecessors, (47), 13 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2022-01-10 08:19:49,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1165 transitions. [2022-01-10 08:19:49,025 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1165 transitions. Word has length 178 [2022-01-10 08:19:49,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:49,025 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1165 transitions. [2022-01-10 08:19:49,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:49,025 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1165 transitions. [2022-01-10 08:19:49,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:19:49,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:49,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:19:49,036 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 08:19:49,234 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 08:19:49,235 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:49,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:49,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1096671762, now seen corresponding path program 1 times [2022-01-10 08:19:49,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:49,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359686993] [2022-01-10 08:19:49,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:49,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:49,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:49,238 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 08:19:49,241 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 08:19:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:49,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:49,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:49,579 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 08:19:49,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:49,580 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:49,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359686993] [2022-01-10 08:19:49,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1359686993] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:49,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:49,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:49,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209029464] [2022-01-10 08:19:49,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:49,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:49,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:49,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:49,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:49,581 INFO L87 Difference]: Start difference. First operand 754 states and 1165 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:49,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:49,926 INFO L93 Difference]: Finished difference Result 1487 states and 2303 transitions. [2022-01-10 08:19:49,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:19:49,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:19:49,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:49,929 INFO L225 Difference]: With dead ends: 1487 [2022-01-10 08:19:49,929 INFO L226 Difference]: Without dead ends: 754 [2022-01-10 08:19:49,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 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 08:19:49,933 INFO L933 BasicCegarLoop]: 550 mSDtfsCounter, 783 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:49,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 1179 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:19:49,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-01-10 08:19:49,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2022-01-10 08:19:49,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 693 states have (on average 1.533910533910534) internal successors, (1063), 695 states have internal predecessors, (1063), 47 states have call successors, (47), 12 states have call predecessors, (47), 13 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2022-01-10 08:19:49,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1158 transitions. [2022-01-10 08:19:49,958 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1158 transitions. Word has length 178 [2022-01-10 08:19:49,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:49,958 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1158 transitions. [2022-01-10 08:19:49,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:49,958 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1158 transitions. [2022-01-10 08:19:49,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:19:49,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:49,959 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:19:49,981 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 08:19:50,168 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 08:19:50,168 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:50,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:50,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1738790770, now seen corresponding path program 1 times [2022-01-10 08:19:50,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:50,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077952971] [2022-01-10 08:19:50,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:50,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:50,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:50,170 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 08:19:50,171 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 08:19:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:50,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:50,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:50,535 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 08:19:50,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:50,535 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:50,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077952971] [2022-01-10 08:19:50,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077952971] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:50,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:50,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:50,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747816793] [2022-01-10 08:19:50,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:50,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:50,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:50,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:50,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:50,537 INFO L87 Difference]: Start difference. First operand 754 states and 1158 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:50,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:50,828 INFO L93 Difference]: Finished difference Result 1487 states and 2289 transitions. [2022-01-10 08:19:50,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:19:50,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:19:50,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:50,840 INFO L225 Difference]: With dead ends: 1487 [2022-01-10 08:19:50,840 INFO L226 Difference]: Without dead ends: 754 [2022-01-10 08:19:50,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 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 08:19:50,842 INFO L933 BasicCegarLoop]: 547 mSDtfsCounter, 777 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:50,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [797 Valid, 1172 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:19:50,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-01-10 08:19:50,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2022-01-10 08:19:50,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 693 states have (on average 1.5238095238095237) internal successors, (1056), 695 states have internal predecessors, (1056), 47 states have call successors, (47), 12 states have call predecessors, (47), 13 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2022-01-10 08:19:50,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1151 transitions. [2022-01-10 08:19:50,878 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1151 transitions. Word has length 178 [2022-01-10 08:19:50,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:50,878 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1151 transitions. [2022-01-10 08:19:50,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:50,878 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1151 transitions. [2022-01-10 08:19:50,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:19:50,879 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:50,879 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:19:50,901 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 08:19:51,088 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 08:19:51,089 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:51,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:51,089 INFO L85 PathProgramCache]: Analyzing trace with hash 444783982, now seen corresponding path program 1 times [2022-01-10 08:19:51,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:51,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818604065] [2022-01-10 08:19:51,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:51,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:51,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:51,091 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 08:19:51,092 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 08:19:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:51,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:51,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:51,427 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 08:19:51,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:51,427 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:51,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818604065] [2022-01-10 08:19:51,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [818604065] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:51,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:51,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:51,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406094593] [2022-01-10 08:19:51,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:51,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:51,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:51,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:51,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:51,428 INFO L87 Difference]: Start difference. First operand 754 states and 1151 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:51,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:51,718 INFO L93 Difference]: Finished difference Result 1487 states and 2275 transitions. [2022-01-10 08:19:51,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:19:51,718 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:19:51,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:51,720 INFO L225 Difference]: With dead ends: 1487 [2022-01-10 08:19:51,720 INFO L226 Difference]: Without dead ends: 754 [2022-01-10 08:19:51,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 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 08:19:51,722 INFO L933 BasicCegarLoop]: 544 mSDtfsCounter, 771 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:51,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 1165 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:19:51,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-01-10 08:19:51,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2022-01-10 08:19:51,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 693 states have (on average 1.5137085137085138) internal successors, (1049), 695 states have internal predecessors, (1049), 47 states have call successors, (47), 12 states have call predecessors, (47), 13 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2022-01-10 08:19:51,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1144 transitions. [2022-01-10 08:19:51,743 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1144 transitions. Word has length 178 [2022-01-10 08:19:51,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:51,743 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1144 transitions. [2022-01-10 08:19:51,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:51,743 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1144 transitions. [2022-01-10 08:19:51,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:19:51,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:51,744 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:19:51,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:51,952 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 08:19:51,953 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:51,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:51,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1259526158, now seen corresponding path program 1 times [2022-01-10 08:19:51,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:51,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2083952905] [2022-01-10 08:19:51,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:51,954 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:51,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:51,955 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 08:19:51,956 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 08:19:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:52,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:52,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:52,349 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 08:19:52,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:52,350 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:52,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2083952905] [2022-01-10 08:19:52,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2083952905] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:52,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:52,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:52,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013362289] [2022-01-10 08:19:52,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:52,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:52,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:52,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:52,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:52,351 INFO L87 Difference]: Start difference. First operand 754 states and 1144 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:52,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:52,639 INFO L93 Difference]: Finished difference Result 1487 states and 2261 transitions. [2022-01-10 08:19:52,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:19:52,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:19:52,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:52,642 INFO L225 Difference]: With dead ends: 1487 [2022-01-10 08:19:52,642 INFO L226 Difference]: Without dead ends: 754 [2022-01-10 08:19:52,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 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 08:19:52,644 INFO L933 BasicCegarLoop]: 541 mSDtfsCounter, 765 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:52,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 1158 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:19:52,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-01-10 08:19:52,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2022-01-10 08:19:52,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 693 states have (on average 1.5036075036075036) internal successors, (1042), 695 states have internal predecessors, (1042), 47 states have call successors, (47), 12 states have call predecessors, (47), 13 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2022-01-10 08:19:52,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1137 transitions. [2022-01-10 08:19:52,666 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1137 transitions. Word has length 178 [2022-01-10 08:19:52,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:52,666 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1137 transitions. [2022-01-10 08:19:52,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:52,666 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1137 transitions. [2022-01-10 08:19:52,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:19:52,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:52,667 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:19:52,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:52,875 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 08:19:52,876 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:52,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:52,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1317895406, now seen corresponding path program 1 times [2022-01-10 08:19:52,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:52,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838458061] [2022-01-10 08:19:52,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:52,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:52,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:52,878 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 08:19:52,879 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 08:19:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:53,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:53,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:53,213 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 08:19:53,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:53,213 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:53,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838458061] [2022-01-10 08:19:53,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838458061] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:53,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:53,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:53,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325085322] [2022-01-10 08:19:53,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:53,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:53,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:53,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:53,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:53,215 INFO L87 Difference]: Start difference. First operand 754 states and 1137 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:53,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:53,512 INFO L93 Difference]: Finished difference Result 1487 states and 2247 transitions. [2022-01-10 08:19:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:19:53,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:19:53,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:53,516 INFO L225 Difference]: With dead ends: 1487 [2022-01-10 08:19:53,516 INFO L226 Difference]: Without dead ends: 754 [2022-01-10 08:19:53,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 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 08:19:53,518 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 758 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:53,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 1151 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:19:53,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-01-10 08:19:53,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2022-01-10 08:19:53,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 693 states have (on average 1.4935064935064934) internal successors, (1035), 695 states have internal predecessors, (1035), 47 states have call successors, (47), 12 states have call predecessors, (47), 13 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2022-01-10 08:19:53,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1130 transitions. [2022-01-10 08:19:53,542 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1130 transitions. Word has length 178 [2022-01-10 08:19:53,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:53,542 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1130 transitions. [2022-01-10 08:19:53,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:53,543 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1130 transitions. [2022-01-10 08:19:53,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:19:53,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:53,544 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:19:53,551 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 08:19:53,751 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 08:19:53,751 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:53,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:53,752 INFO L85 PathProgramCache]: Analyzing trace with hash -587800342, now seen corresponding path program 1 times [2022-01-10 08:19:53,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:53,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282236160] [2022-01-10 08:19:53,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:53,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:53,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:53,753 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 08:19:53,755 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 08:19:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:53,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:53,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:54,122 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 08:19:54,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:54,123 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:54,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282236160] [2022-01-10 08:19:54,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282236160] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:54,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:54,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:54,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031735644] [2022-01-10 08:19:54,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:54,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:54,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:54,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:54,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:54,124 INFO L87 Difference]: Start difference. First operand 754 states and 1130 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:54,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:54,425 INFO L93 Difference]: Finished difference Result 1487 states and 2233 transitions. [2022-01-10 08:19:54,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:19:54,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:19:54,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:54,428 INFO L225 Difference]: With dead ends: 1487 [2022-01-10 08:19:54,428 INFO L226 Difference]: Without dead ends: 754 [2022-01-10 08:19:54,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 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 08:19:54,430 INFO L933 BasicCegarLoop]: 535 mSDtfsCounter, 752 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:54,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 1144 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:19:54,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-01-10 08:19:54,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2022-01-10 08:19:54,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 693 states have (on average 1.4834054834054835) internal successors, (1028), 695 states have internal predecessors, (1028), 47 states have call successors, (47), 12 states have call predecessors, (47), 13 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2022-01-10 08:19:54,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1123 transitions. [2022-01-10 08:19:54,454 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1123 transitions. Word has length 178 [2022-01-10 08:19:54,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:54,454 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1123 transitions. [2022-01-10 08:19:54,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:54,454 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1123 transitions. [2022-01-10 08:19:54,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:19:54,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:54,455 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:19:54,479 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 08:19:54,663 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 08:19:54,663 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:54,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:54,664 INFO L85 PathProgramCache]: Analyzing trace with hash -233632402, now seen corresponding path program 1 times [2022-01-10 08:19:54,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:54,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1937013466] [2022-01-10 08:19:54,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:54,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:54,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:54,680 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 08:19:54,688 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 08:19:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:54,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:54,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:55,022 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 08:19:55,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:55,022 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:55,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1937013466] [2022-01-10 08:19:55,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1937013466] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:55,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:55,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:55,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356182562] [2022-01-10 08:19:55,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:55,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:55,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:55,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:55,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:55,023 INFO L87 Difference]: Start difference. First operand 754 states and 1123 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:55,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:55,465 INFO L93 Difference]: Finished difference Result 1679 states and 2517 transitions. [2022-01-10 08:19:55,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:19:55,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:19:55,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:55,468 INFO L225 Difference]: With dead ends: 1679 [2022-01-10 08:19:55,469 INFO L226 Difference]: Without dead ends: 946 [2022-01-10 08:19:55,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 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 08:19:55,472 INFO L933 BasicCegarLoop]: 532 mSDtfsCounter, 872 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:55,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [892 Valid, 1136 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:19:55,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-01-10 08:19:55,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 946. [2022-01-10 08:19:55,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 879 states have (on average 1.459613196814562) internal successors, (1283), 881 states have internal predecessors, (1283), 49 states have call successors, (49), 16 states have call predecessors, (49), 17 states have return successors, (50), 49 states have call predecessors, (50), 49 states have call successors, (50) [2022-01-10 08:19:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1382 transitions. [2022-01-10 08:19:55,533 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1382 transitions. Word has length 178 [2022-01-10 08:19:55,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:55,533 INFO L470 AbstractCegarLoop]: Abstraction has 946 states and 1382 transitions. [2022-01-10 08:19:55,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:55,534 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1382 transitions. [2022-01-10 08:19:55,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:19:55,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:55,534 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:19:55,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:55,735 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 08:19:55,735 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:55,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:55,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1741447277, now seen corresponding path program 1 times [2022-01-10 08:19:55,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:55,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587339110] [2022-01-10 08:19:55,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:55,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:55,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:55,737 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 08:19:55,748 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 08:19:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:55,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:55,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:56,113 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 08:19:56,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:56,114 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:56,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587339110] [2022-01-10 08:19:56,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587339110] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:56,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:56,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:56,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472274555] [2022-01-10 08:19:56,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:56,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:56,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:56,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:56,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:56,115 INFO L87 Difference]: Start difference. First operand 946 states and 1382 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:56,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:56,565 INFO L93 Difference]: Finished difference Result 2063 states and 3035 transitions. [2022-01-10 08:19:56,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:19:56,565 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:19:56,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:56,569 INFO L225 Difference]: With dead ends: 2063 [2022-01-10 08:19:56,569 INFO L226 Difference]: Without dead ends: 1138 [2022-01-10 08:19:56,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 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 08:19:56,571 INFO L933 BasicCegarLoop]: 530 mSDtfsCounter, 865 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:56,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 1130 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:19:56,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-01-10 08:19:56,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1138. [2022-01-10 08:19:56,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1065 states have (on average 1.44037558685446) internal successors, (1534), 1067 states have internal predecessors, (1534), 51 states have call successors, (51), 20 states have call predecessors, (51), 21 states have return successors, (52), 51 states have call predecessors, (52), 51 states have call successors, (52) [2022-01-10 08:19:56,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1637 transitions. [2022-01-10 08:19:56,611 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1637 transitions. Word has length 178 [2022-01-10 08:19:56,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:56,611 INFO L470 AbstractCegarLoop]: Abstraction has 1138 states and 1637 transitions. [2022-01-10 08:19:56,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:56,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1637 transitions. [2022-01-10 08:19:56,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:19:56,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:56,612 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:19:56,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:56,820 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 08:19:56,820 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:56,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:56,820 INFO L85 PathProgramCache]: Analyzing trace with hash 861971058, now seen corresponding path program 1 times [2022-01-10 08:19:56,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:56,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471343851] [2022-01-10 08:19:56,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:56,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:56,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:56,826 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 08:19:56,828 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 08:19:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:56,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:56,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:57,152 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 08:19:57,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:57,153 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:57,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471343851] [2022-01-10 08:19:57,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471343851] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:57,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:57,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:57,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678027450] [2022-01-10 08:19:57,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:57,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:57,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:57,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:57,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:57,154 INFO L87 Difference]: Start difference. First operand 1138 states and 1637 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:57,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:57,639 INFO L93 Difference]: Finished difference Result 2447 states and 3545 transitions. [2022-01-10 08:19:57,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:19:57,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:19:57,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:57,644 INFO L225 Difference]: With dead ends: 2447 [2022-01-10 08:19:57,644 INFO L226 Difference]: Without dead ends: 1330 [2022-01-10 08:19:57,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 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 08:19:57,647 INFO L933 BasicCegarLoop]: 525 mSDtfsCounter, 859 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:57,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [879 Valid, 1121 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:19:57,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2022-01-10 08:19:57,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 1330. [2022-01-10 08:19:57,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1251 states have (on average 1.4236610711430855) internal successors, (1781), 1253 states have internal predecessors, (1781), 53 states have call successors, (53), 24 states have call predecessors, (53), 25 states have return successors, (54), 53 states have call predecessors, (54), 53 states have call successors, (54) [2022-01-10 08:19:57,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 1888 transitions. [2022-01-10 08:19:57,725 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 1888 transitions. Word has length 178 [2022-01-10 08:19:57,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:57,725 INFO L470 AbstractCegarLoop]: Abstraction has 1330 states and 1888 transitions. [2022-01-10 08:19:57,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:57,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 1888 transitions. [2022-01-10 08:19:57,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:19:57,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:57,728 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:19:57,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:57,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:57,939 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:57,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:57,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1295213678, now seen corresponding path program 1 times [2022-01-10 08:19:57,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:57,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [588301424] [2022-01-10 08:19:57,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:57,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:57,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:57,942 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:57,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 08:19:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:58,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:58,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:58,387 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 08:19:58,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:58,387 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:58,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [588301424] [2022-01-10 08:19:58,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [588301424] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:58,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:58,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:58,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393324160] [2022-01-10 08:19:58,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:58,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:58,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:58,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:58,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:58,389 INFO L87 Difference]: Start difference. First operand 1330 states and 1888 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:58,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:58,896 INFO L93 Difference]: Finished difference Result 2831 states and 4047 transitions. [2022-01-10 08:19:58,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:19:58,897 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:19:58,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:58,908 INFO L225 Difference]: With dead ends: 2831 [2022-01-10 08:19:58,908 INFO L226 Difference]: Without dead ends: 1522 [2022-01-10 08:19:58,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 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 08:19:58,912 INFO L933 BasicCegarLoop]: 522 mSDtfsCounter, 852 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:58,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [872 Valid, 1114 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:19:58,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2022-01-10 08:19:58,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1522. [2022-01-10 08:19:59,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1437 states have (on average 1.4084899095337509) internal successors, (2024), 1439 states have internal predecessors, (2024), 55 states have call successors, (55), 28 states have call predecessors, (55), 29 states have return successors, (56), 55 states have call predecessors, (56), 55 states have call successors, (56) [2022-01-10 08:19:59,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 2135 transitions. [2022-01-10 08:19:59,002 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 2135 transitions. Word has length 178 [2022-01-10 08:19:59,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:59,002 INFO L470 AbstractCegarLoop]: Abstraction has 1522 states and 2135 transitions. [2022-01-10 08:19:59,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:59,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 2135 transitions. [2022-01-10 08:19:59,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:19:59,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:59,004 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:59,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:59,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:59,212 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:59,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:59,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2030358285, now seen corresponding path program 1 times [2022-01-10 08:19:59,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:59,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46054983] [2022-01-10 08:19:59,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:59,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:59,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:59,214 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:59,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 08:19:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:59,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:59,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:59,548 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 08:19:59,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:59,548 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:59,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46054983] [2022-01-10 08:19:59,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46054983] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:59,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:59,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:59,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560064580] [2022-01-10 08:19:59,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:59,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:59,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:59,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:59,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:59,550 INFO L87 Difference]: Start difference. First operand 1522 states and 2135 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:59,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:59,942 INFO L93 Difference]: Finished difference Result 3215 states and 4541 transitions. [2022-01-10 08:19:59,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:19:59,948 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:19:59,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:59,952 INFO L225 Difference]: With dead ends: 3215 [2022-01-10 08:19:59,953 INFO L226 Difference]: Without dead ends: 1714 [2022-01-10 08:19:59,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 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 08:19:59,956 INFO L933 BasicCegarLoop]: 519 mSDtfsCounter, 845 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:59,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 1107 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:19:59,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2022-01-10 08:20:00,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1714. [2022-01-10 08:20:00,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1623 states have (on average 1.3943314849044979) internal successors, (2263), 1625 states have internal predecessors, (2263), 57 states have call successors, (57), 32 states have call predecessors, (57), 33 states have return successors, (58), 57 states have call predecessors, (58), 57 states have call successors, (58) [2022-01-10 08:20:00,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 2378 transitions. [2022-01-10 08:20:00,028 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 2378 transitions. Word has length 178 [2022-01-10 08:20:00,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:00,028 INFO L470 AbstractCegarLoop]: Abstraction has 1714 states and 2378 transitions. [2022-01-10 08:20:00,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:00,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 2378 transitions. [2022-01-10 08:20:00,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:20:00,029 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:00,029 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:00,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:00,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:00,238 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:00,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:00,238 INFO L85 PathProgramCache]: Analyzing trace with hash -380747281, now seen corresponding path program 1 times [2022-01-10 08:20:00,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:00,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435720735] [2022-01-10 08:20:00,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:00,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:00,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:00,240 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:00,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-01-10 08:20:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:00,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:00,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:00,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:00,582 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:00,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435720735] [2022-01-10 08:20:00,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435720735] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:00,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:00,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:00,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216581855] [2022-01-10 08:20:00,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:00,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:00,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:00,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:00,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:00,584 INFO L87 Difference]: Start difference. First operand 1714 states and 2378 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:01,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:01,065 INFO L93 Difference]: Finished difference Result 3599 states and 5027 transitions. [2022-01-10 08:20:01,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:20:01,066 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:20:01,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:01,070 INFO L225 Difference]: With dead ends: 3599 [2022-01-10 08:20:01,070 INFO L226 Difference]: Without dead ends: 1906 [2022-01-10 08:20:01,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:20:01,074 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 837 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:01,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 1100 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:20:01,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2022-01-10 08:20:01,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1906. [2022-01-10 08:20:01,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1809 states have (on average 1.380873410724157) internal successors, (2498), 1811 states have internal predecessors, (2498), 59 states have call successors, (59), 36 states have call predecessors, (59), 37 states have return successors, (60), 59 states have call predecessors, (60), 59 states have call successors, (60) [2022-01-10 08:20:01,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 2617 transitions. [2022-01-10 08:20:01,162 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 2617 transitions. Word has length 178 [2022-01-10 08:20:01,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:01,162 INFO L470 AbstractCegarLoop]: Abstraction has 1906 states and 2617 transitions. [2022-01-10 08:20:01,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:01,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 2617 transitions. [2022-01-10 08:20:01,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:20:01,163 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:01,164 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:01,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-01-10 08:20:01,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:01,368 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:01,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:01,369 INFO L85 PathProgramCache]: Analyzing trace with hash 99181035, now seen corresponding path program 1 times [2022-01-10 08:20:01,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:01,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [675087084] [2022-01-10 08:20:01,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:01,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:01,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:01,370 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:01,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-01-10 08:20:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:01,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:01,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:01,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:01,777 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:01,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [675087084] [2022-01-10 08:20:01,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [675087084] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:01,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:01,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:01,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977020108] [2022-01-10 08:20:01,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:01,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:01,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:01,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:01,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:01,778 INFO L87 Difference]: Start difference. First operand 1906 states and 2617 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:02,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:02,389 INFO L93 Difference]: Finished difference Result 3983 states and 5505 transitions. [2022-01-10 08:20:02,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:20:02,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:20:02,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:02,394 INFO L225 Difference]: With dead ends: 3983 [2022-01-10 08:20:02,394 INFO L226 Difference]: Without dead ends: 2098 [2022-01-10 08:20:02,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:20:02,398 INFO L933 BasicCegarLoop]: 513 mSDtfsCounter, 830 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:02,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [850 Valid, 1093 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 08:20:02,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2022-01-10 08:20:02,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 2098. [2022-01-10 08:20:02,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 1995 states have (on average 1.3679197994987469) internal successors, (2729), 1997 states have internal predecessors, (2729), 61 states have call successors, (61), 40 states have call predecessors, (61), 41 states have return successors, (62), 61 states have call predecessors, (62), 61 states have call successors, (62) [2022-01-10 08:20:02,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 2852 transitions. [2022-01-10 08:20:02,520 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 2852 transitions. Word has length 178 [2022-01-10 08:20:02,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:02,521 INFO L470 AbstractCegarLoop]: Abstraction has 2098 states and 2852 transitions. [2022-01-10 08:20:02,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:02,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 2852 transitions. [2022-01-10 08:20:02,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:20:02,521 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:02,522 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:02,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:02,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:02,728 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:02,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:02,728 INFO L85 PathProgramCache]: Analyzing trace with hash 238535536, now seen corresponding path program 1 times [2022-01-10 08:20:02,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:02,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078084163] [2022-01-10 08:20:02,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:02,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:02,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:02,730 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:02,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-01-10 08:20:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:02,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:02,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:03,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:03,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:03,110 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:03,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078084163] [2022-01-10 08:20:03,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078084163] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:03,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:03,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:03,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986759105] [2022-01-10 08:20:03,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:03,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:03,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:03,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:03,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:03,111 INFO L87 Difference]: Start difference. First operand 2098 states and 2852 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:03,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:03,645 INFO L93 Difference]: Finished difference Result 4367 states and 5975 transitions. [2022-01-10 08:20:03,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:20:03,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:20:03,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:03,650 INFO L225 Difference]: With dead ends: 4367 [2022-01-10 08:20:03,650 INFO L226 Difference]: Without dead ends: 2290 [2022-01-10 08:20:03,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:20:03,653 INFO L933 BasicCegarLoop]: 510 mSDtfsCounter, 823 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:03,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 1086 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:20:03,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-01-10 08:20:03,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 2290. [2022-01-10 08:20:03,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2290 states, 2181 states have (on average 1.3553415864282439) internal successors, (2956), 2183 states have internal predecessors, (2956), 63 states have call successors, (63), 44 states have call predecessors, (63), 45 states have return successors, (64), 63 states have call predecessors, (64), 63 states have call successors, (64) [2022-01-10 08:20:03,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2290 states to 2290 states and 3083 transitions. [2022-01-10 08:20:03,791 INFO L78 Accepts]: Start accepts. Automaton has 2290 states and 3083 transitions. Word has length 178 [2022-01-10 08:20:03,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:03,791 INFO L470 AbstractCegarLoop]: Abstraction has 2290 states and 3083 transitions. [2022-01-10 08:20:03,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:03,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2290 states and 3083 transitions. [2022-01-10 08:20:03,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:20:03,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:03,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:03,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:04,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:04,000 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:04,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:04,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1378904914, now seen corresponding path program 1 times [2022-01-10 08:20:04,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:04,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257866037] [2022-01-10 08:20:04,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:04,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:04,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:04,004 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:04,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-01-10 08:20:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:04,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:04,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:04,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:04,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:04,349 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:04,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257866037] [2022-01-10 08:20:04,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257866037] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:04,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:04,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:04,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220901409] [2022-01-10 08:20:04,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:04,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:04,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:04,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:04,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:04,350 INFO L87 Difference]: Start difference. First operand 2290 states and 3083 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:04,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:04,941 INFO L93 Difference]: Finished difference Result 4751 states and 6437 transitions. [2022-01-10 08:20:04,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:20:04,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:20:04,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:04,953 INFO L225 Difference]: With dead ends: 4751 [2022-01-10 08:20:04,953 INFO L226 Difference]: Without dead ends: 2482 [2022-01-10 08:20:04,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:20:04,957 INFO L933 BasicCegarLoop]: 507 mSDtfsCounter, 816 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:04,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [836 Valid, 1079 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:20:04,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2482 states. [2022-01-10 08:20:05,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2482 to 2482. [2022-01-10 08:20:05,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2482 states, 2367 states have (on average 1.34305027460921) internal successors, (3179), 2369 states have internal predecessors, (3179), 65 states have call successors, (65), 48 states have call predecessors, (65), 49 states have return successors, (66), 65 states have call predecessors, (66), 65 states have call successors, (66) [2022-01-10 08:20:05,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 3310 transitions. [2022-01-10 08:20:05,110 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 3310 transitions. Word has length 178 [2022-01-10 08:20:05,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:05,110 INFO L470 AbstractCegarLoop]: Abstraction has 2482 states and 3310 transitions. [2022-01-10 08:20:05,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:05,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 3310 transitions. [2022-01-10 08:20:05,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:20:05,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:05,111 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:05,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:05,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:05,319 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:05,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:05,320 INFO L85 PathProgramCache]: Analyzing trace with hash -481230669, now seen corresponding path program 1 times [2022-01-10 08:20:05,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:05,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8789305] [2022-01-10 08:20:05,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:05,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:05,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:05,321 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:05,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-01-10 08:20:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:05,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:05,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:05,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:05,718 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:05,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8789305] [2022-01-10 08:20:05,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8789305] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:05,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:05,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:05,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116945774] [2022-01-10 08:20:05,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:05,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:05,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:05,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:05,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:05,720 INFO L87 Difference]: Start difference. First operand 2482 states and 3310 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:06,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:06,325 INFO L93 Difference]: Finished difference Result 5135 states and 6891 transitions. [2022-01-10 08:20:06,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:20:06,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:20:06,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:06,331 INFO L225 Difference]: With dead ends: 5135 [2022-01-10 08:20:06,331 INFO L226 Difference]: Without dead ends: 2674 [2022-01-10 08:20:06,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:20:06,334 INFO L933 BasicCegarLoop]: 504 mSDtfsCounter, 809 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:06,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 1072 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:20:06,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2022-01-10 08:20:06,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 2674. [2022-01-10 08:20:06,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2674 states, 2553 states have (on average 1.3309831570701136) internal successors, (3398), 2555 states have internal predecessors, (3398), 67 states have call successors, (67), 52 states have call predecessors, (67), 53 states have return successors, (68), 67 states have call predecessors, (68), 67 states have call successors, (68) [2022-01-10 08:20:06,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 3533 transitions. [2022-01-10 08:20:06,467 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 3533 transitions. Word has length 178 [2022-01-10 08:20:06,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:06,467 INFO L470 AbstractCegarLoop]: Abstraction has 2674 states and 3533 transitions. [2022-01-10 08:20:06,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:06,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 3533 transitions. [2022-01-10 08:20:06,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:20:06,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:06,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:06,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:06,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:06,677 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:06,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:06,677 INFO L85 PathProgramCache]: Analyzing trace with hash 404086256, now seen corresponding path program 1 times [2022-01-10 08:20:06,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:06,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164570797] [2022-01-10 08:20:06,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:06,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:06,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:06,681 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:06,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-01-10 08:20:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:06,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:06,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:07,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:07,044 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:07,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164570797] [2022-01-10 08:20:07,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164570797] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:07,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:07,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:07,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921512624] [2022-01-10 08:20:07,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:07,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:07,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:07,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:07,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:07,046 INFO L87 Difference]: Start difference. First operand 2674 states and 3533 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:07,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:07,585 INFO L93 Difference]: Finished difference Result 5519 states and 7337 transitions. [2022-01-10 08:20:07,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:20:07,586 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:20:07,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:07,592 INFO L225 Difference]: With dead ends: 5519 [2022-01-10 08:20:07,592 INFO L226 Difference]: Without dead ends: 2866 [2022-01-10 08:20:07,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:20:07,596 INFO L933 BasicCegarLoop]: 501 mSDtfsCounter, 802 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:07,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [822 Valid, 1065 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:20:07,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2866 states. [2022-01-10 08:20:07,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2866 to 2866. [2022-01-10 08:20:07,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2739 states have (on average 1.3190945600584154) internal successors, (3613), 2741 states have internal predecessors, (3613), 69 states have call successors, (69), 56 states have call predecessors, (69), 57 states have return successors, (70), 69 states have call predecessors, (70), 69 states have call successors, (70) [2022-01-10 08:20:07,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 3752 transitions. [2022-01-10 08:20:07,807 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 3752 transitions. Word has length 178 [2022-01-10 08:20:07,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:07,807 INFO L470 AbstractCegarLoop]: Abstraction has 2866 states and 3752 transitions. [2022-01-10 08:20:07,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:07,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 3752 transitions. [2022-01-10 08:20:07,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:20:07,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:07,809 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:07,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:08,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:08,020 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:08,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:08,021 INFO L85 PathProgramCache]: Analyzing trace with hash 281915508, now seen corresponding path program 1 times [2022-01-10 08:20:08,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:08,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679557487] [2022-01-10 08:20:08,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:08,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:08,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:08,022 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:08,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-01-10 08:20:08,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:08,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:08,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:08,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:08,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:08,381 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:08,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679557487] [2022-01-10 08:20:08,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [679557487] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:08,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:08,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:08,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378675809] [2022-01-10 08:20:08,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:08,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:08,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:08,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:08,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:08,384 INFO L87 Difference]: Start difference. First operand 2866 states and 3752 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:09,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:09,080 INFO L93 Difference]: Finished difference Result 5903 states and 7775 transitions. [2022-01-10 08:20:09,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:20:09,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:20:09,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:09,088 INFO L225 Difference]: With dead ends: 5903 [2022-01-10 08:20:09,089 INFO L226 Difference]: Without dead ends: 3058 [2022-01-10 08:20:09,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:20:09,094 INFO L933 BasicCegarLoop]: 498 mSDtfsCounter, 795 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:09,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [815 Valid, 1058 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:20:09,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3058 states. [2022-01-10 08:20:09,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3058 to 3058. [2022-01-10 08:20:09,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3058 states, 2925 states have (on average 1.3073504273504273) internal successors, (3824), 2927 states have internal predecessors, (3824), 71 states have call successors, (71), 60 states have call predecessors, (71), 61 states have return successors, (72), 71 states have call predecessors, (72), 71 states have call successors, (72) [2022-01-10 08:20:09,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3058 states to 3058 states and 3967 transitions. [2022-01-10 08:20:09,356 INFO L78 Accepts]: Start accepts. Automaton has 3058 states and 3967 transitions. Word has length 178 [2022-01-10 08:20:09,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:09,356 INFO L470 AbstractCegarLoop]: Abstraction has 3058 states and 3967 transitions. [2022-01-10 08:20:09,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:09,356 INFO L276 IsEmpty]: Start isEmpty. Operand 3058 states and 3967 transitions. [2022-01-10 08:20:09,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:20:09,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:09,357 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:09,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:09,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:09,564 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:09,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:09,565 INFO L85 PathProgramCache]: Analyzing trace with hash -134351311, now seen corresponding path program 1 times [2022-01-10 08:20:09,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:09,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387460102] [2022-01-10 08:20:09,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:09,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:09,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:09,567 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:09,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-01-10 08:20:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:09,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:09,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:09,874 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 08:20:09,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:09,874 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:09,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387460102] [2022-01-10 08:20:09,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387460102] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:09,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:09,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:20:09,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023425420] [2022-01-10 08:20:09,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:09,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:09,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:09,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:09,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:09,876 INFO L87 Difference]: Start difference. First operand 3058 states and 3967 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:10,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:10,207 INFO L93 Difference]: Finished difference Result 6444 states and 8406 transitions. [2022-01-10 08:20:10,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:10,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:20:10,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:10,215 INFO L225 Difference]: With dead ends: 6444 [2022-01-10 08:20:10,215 INFO L226 Difference]: Without dead ends: 3408 [2022-01-10 08:20:10,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:20:10,224 INFO L933 BasicCegarLoop]: 525 mSDtfsCounter, 479 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 2284 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:10,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 2284 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:10,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2022-01-10 08:20:10,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 3064. [2022-01-10 08:20:10,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3064 states, 2931 states have (on average 1.298532923916752) internal successors, (3806), 2933 states have internal predecessors, (3806), 71 states have call successors, (71), 60 states have call predecessors, (71), 61 states have return successors, (72), 71 states have call predecessors, (72), 71 states have call successors, (72) [2022-01-10 08:20:10,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3064 states to 3064 states and 3949 transitions. [2022-01-10 08:20:10,490 INFO L78 Accepts]: Start accepts. Automaton has 3064 states and 3949 transitions. Word has length 178 [2022-01-10 08:20:10,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:10,490 INFO L470 AbstractCegarLoop]: Abstraction has 3064 states and 3949 transitions. [2022-01-10 08:20:10,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:10,490 INFO L276 IsEmpty]: Start isEmpty. Operand 3064 states and 3949 transitions. [2022-01-10 08:20:10,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:20:10,491 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:10,491 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:10,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:10,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:10,704 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:10,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:10,705 INFO L85 PathProgramCache]: Analyzing trace with hash 353695795, now seen corresponding path program 1 times [2022-01-10 08:20:10,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:10,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826451666] [2022-01-10 08:20:10,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:10,706 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:10,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:10,707 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:10,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-01-10 08:20:10,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:10,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:10,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:11,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:11,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:11,077 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:11,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826451666] [2022-01-10 08:20:11,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826451666] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:11,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:11,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:20:11,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255703014] [2022-01-10 08:20:11,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:11,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:11,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:11,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:11,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:11,078 INFO L87 Difference]: Start difference. First operand 3064 states and 3949 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:11,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:11,399 INFO L93 Difference]: Finished difference Result 6428 states and 8334 transitions. [2022-01-10 08:20:11,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:11,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:20:11,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:11,410 INFO L225 Difference]: With dead ends: 6428 [2022-01-10 08:20:11,410 INFO L226 Difference]: Without dead ends: 3386 [2022-01-10 08:20:11,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:20:11,417 INFO L933 BasicCegarLoop]: 527 mSDtfsCounter, 440 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 2277 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:11,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 2277 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:11,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2022-01-10 08:20:11,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 3070. [2022-01-10 08:20:11,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3070 states, 2937 states have (on average 1.289751447054818) internal successors, (3788), 2939 states have internal predecessors, (3788), 71 states have call successors, (71), 60 states have call predecessors, (71), 61 states have return successors, (72), 71 states have call predecessors, (72), 71 states have call successors, (72) [2022-01-10 08:20:11,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3070 states to 3070 states and 3931 transitions. [2022-01-10 08:20:11,720 INFO L78 Accepts]: Start accepts. Automaton has 3070 states and 3931 transitions. Word has length 178 [2022-01-10 08:20:11,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:11,720 INFO L470 AbstractCegarLoop]: Abstraction has 3070 states and 3931 transitions. [2022-01-10 08:20:11,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:11,720 INFO L276 IsEmpty]: Start isEmpty. Operand 3070 states and 3931 transitions. [2022-01-10 08:20:11,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:20:11,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:11,721 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:11,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-01-10 08:20:11,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:11,923 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:11,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:11,923 INFO L85 PathProgramCache]: Analyzing trace with hash -2012339275, now seen corresponding path program 1 times [2022-01-10 08:20:11,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:11,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894739097] [2022-01-10 08:20:11,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:11,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:11,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:11,928 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:11,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-01-10 08:20:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:12,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:12,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:12,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:12,254 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:12,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894739097] [2022-01-10 08:20:12,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894739097] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:12,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:12,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:20:12,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811996858] [2022-01-10 08:20:12,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:12,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:12,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:12,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:12,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:12,255 INFO L87 Difference]: Start difference. First operand 3070 states and 3931 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:12,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:12,516 INFO L93 Difference]: Finished difference Result 6384 states and 8226 transitions. [2022-01-10 08:20:12,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:12,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:20:12,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:12,522 INFO L225 Difference]: With dead ends: 6384 [2022-01-10 08:20:12,522 INFO L226 Difference]: Without dead ends: 3336 [2022-01-10 08:20:12,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:20:12,527 INFO L933 BasicCegarLoop]: 525 mSDtfsCounter, 362 mSDsluCounter, 1714 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 2239 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:12,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 2239 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:12,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2022-01-10 08:20:12,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 3076. [2022-01-10 08:20:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3076 states, 2943 states have (on average 1.2810057764186205) internal successors, (3770), 2945 states have internal predecessors, (3770), 71 states have call successors, (71), 60 states have call predecessors, (71), 61 states have return successors, (72), 71 states have call predecessors, (72), 71 states have call successors, (72) [2022-01-10 08:20:12,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3076 states to 3076 states and 3913 transitions. [2022-01-10 08:20:12,761 INFO L78 Accepts]: Start accepts. Automaton has 3076 states and 3913 transitions. Word has length 178 [2022-01-10 08:20:12,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:12,761 INFO L470 AbstractCegarLoop]: Abstraction has 3076 states and 3913 transitions. [2022-01-10 08:20:12,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:12,762 INFO L276 IsEmpty]: Start isEmpty. Operand 3076 states and 3913 transitions. [2022-01-10 08:20:12,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:20:12,762 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:12,762 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:12,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:12,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:12,970 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:12,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:12,971 INFO L85 PathProgramCache]: Analyzing trace with hash 249233975, now seen corresponding path program 1 times [2022-01-10 08:20:12,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:12,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185144725] [2022-01-10 08:20:12,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:12,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:12,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:12,973 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:12,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-01-10 08:20:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:13,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:13,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:13,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:13,317 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:13,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185144725] [2022-01-10 08:20:13,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185144725] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:13,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:13,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:20:13,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76137087] [2022-01-10 08:20:13,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:13,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:13,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:13,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:13,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:13,318 INFO L87 Difference]: Start difference. First operand 3076 states and 3913 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:13,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:13,590 INFO L93 Difference]: Finished difference Result 6368 states and 8154 transitions. [2022-01-10 08:20:13,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:13,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:20:13,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:13,597 INFO L225 Difference]: With dead ends: 6368 [2022-01-10 08:20:13,597 INFO L226 Difference]: Without dead ends: 3314 [2022-01-10 08:20:13,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:20:13,601 INFO L933 BasicCegarLoop]: 525 mSDtfsCounter, 323 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 2224 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:13,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 2224 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:13,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3314 states. [2022-01-10 08:20:13,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3314 to 3082. [2022-01-10 08:20:13,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3082 states, 2949 states have (on average 1.2722956934554086) internal successors, (3752), 2951 states have internal predecessors, (3752), 71 states have call successors, (71), 60 states have call predecessors, (71), 61 states have return successors, (72), 71 states have call predecessors, (72), 71 states have call successors, (72) [2022-01-10 08:20:13,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 3895 transitions. [2022-01-10 08:20:13,801 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 3895 transitions. Word has length 178 [2022-01-10 08:20:13,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:13,801 INFO L470 AbstractCegarLoop]: Abstraction has 3082 states and 3895 transitions. [2022-01-10 08:20:13,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:13,801 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 3895 transitions. [2022-01-10 08:20:13,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:20:13,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:13,802 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:13,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:14,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:14,010 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:14,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:14,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1850305081, now seen corresponding path program 1 times [2022-01-10 08:20:14,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:14,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807425796] [2022-01-10 08:20:14,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:14,011 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:14,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:14,012 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:14,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-01-10 08:20:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:14,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:20:14,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:14,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:14,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:14,384 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:14,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807425796] [2022-01-10 08:20:14,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807425796] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:14,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:14,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:20:14,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967235576] [2022-01-10 08:20:14,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:14,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:20:14,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:14,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:20:14,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:20:14,385 INFO L87 Difference]: Start difference. First operand 3082 states and 3895 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:15,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:15,009 INFO L93 Difference]: Finished difference Result 8975 states and 11363 transitions. [2022-01-10 08:20:15,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:20:15,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:20:15,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:15,025 INFO L225 Difference]: With dead ends: 8975 [2022-01-10 08:20:15,025 INFO L226 Difference]: Without dead ends: 5915 [2022-01-10 08:20:15,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:20:15,032 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 432 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:15,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 1083 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:15,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2022-01-10 08:20:15,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 5909. [2022-01-10 08:20:15,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5909 states, 5656 states have (on average 1.2643210749646394) internal successors, (7151), 5659 states have internal predecessors, (7151), 134 states have call successors, (134), 116 states have call predecessors, (134), 118 states have return successors, (136), 134 states have call predecessors, (136), 134 states have call successors, (136) [2022-01-10 08:20:15,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5909 states to 5909 states and 7421 transitions. [2022-01-10 08:20:15,669 INFO L78 Accepts]: Start accepts. Automaton has 5909 states and 7421 transitions. Word has length 178 [2022-01-10 08:20:15,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:15,669 INFO L470 AbstractCegarLoop]: Abstraction has 5909 states and 7421 transitions. [2022-01-10 08:20:15,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:15,669 INFO L276 IsEmpty]: Start isEmpty. Operand 5909 states and 7421 transitions. [2022-01-10 08:20:15,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:20:15,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:15,670 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:15,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:15,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:15,881 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:15,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:15,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1723228602, now seen corresponding path program 1 times [2022-01-10 08:20:15,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:15,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24125353] [2022-01-10 08:20:15,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:15,883 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:15,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:15,884 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:15,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-01-10 08:20:16,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:16,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:16,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:16,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:16,306 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:16,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24125353] [2022-01-10 08:20:16,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24125353] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:16,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:16,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:20:16,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943105070] [2022-01-10 08:20:16,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:16,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:16,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:16,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:16,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:16,309 INFO L87 Difference]: Start difference. First operand 5909 states and 7421 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:17,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:17,409 INFO L93 Difference]: Finished difference Result 14526 states and 18431 transitions. [2022-01-10 08:20:17,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:17,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:20:17,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:17,429 INFO L225 Difference]: With dead ends: 14526 [2022-01-10 08:20:17,429 INFO L226 Difference]: Without dead ends: 8639 [2022-01-10 08:20:17,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:20:17,440 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 289 mSDsluCounter, 1726 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 2257 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:17,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 2257 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:17,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8639 states. [2022-01-10 08:20:18,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8639 to 5987. [2022-01-10 08:20:18,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5987 states, 5734 states have (on average 1.2565399372166026) internal successors, (7205), 5737 states have internal predecessors, (7205), 134 states have call successors, (134), 116 states have call predecessors, (134), 118 states have return successors, (136), 134 states have call predecessors, (136), 134 states have call successors, (136) [2022-01-10 08:20:18,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5987 states to 5987 states and 7475 transitions. [2022-01-10 08:20:18,084 INFO L78 Accepts]: Start accepts. Automaton has 5987 states and 7475 transitions. Word has length 178 [2022-01-10 08:20:18,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:18,084 INFO L470 AbstractCegarLoop]: Abstraction has 5987 states and 7475 transitions. [2022-01-10 08:20:18,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:18,084 INFO L276 IsEmpty]: Start isEmpty. Operand 5987 states and 7475 transitions. [2022-01-10 08:20:18,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:20:18,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:18,085 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:18,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:18,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:18,293 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:18,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:18,294 INFO L85 PathProgramCache]: Analyzing trace with hash -217353412, now seen corresponding path program 1 times [2022-01-10 08:20:18,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:18,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [265583920] [2022-01-10 08:20:18,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:18,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:18,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:18,295 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:18,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-01-10 08:20:18,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:18,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:18,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:18,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:18,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:18,605 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:18,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [265583920] [2022-01-10 08:20:18,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [265583920] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:18,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:18,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:20:18,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847137629] [2022-01-10 08:20:18,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:18,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:18,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:18,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:18,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:18,606 INFO L87 Difference]: Start difference. First operand 5987 states and 7475 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:19,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:19,133 INFO L93 Difference]: Finished difference Result 12134 states and 15253 transitions. [2022-01-10 08:20:19,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:19,134 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:20:19,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:19,148 INFO L225 Difference]: With dead ends: 12134 [2022-01-10 08:20:19,149 INFO L226 Difference]: Without dead ends: 6169 [2022-01-10 08:20:19,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:20:19,157 INFO L933 BasicCegarLoop]: 525 mSDtfsCounter, 244 mSDsluCounter, 1664 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 2189 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:19,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 2189 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:19,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6169 states. [2022-01-10 08:20:19,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6169 to 5993. [2022-01-10 08:20:19,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5993 states, 5740 states have (on average 1.2479094076655053) internal successors, (7163), 5743 states have internal predecessors, (7163), 134 states have call successors, (134), 116 states have call predecessors, (134), 118 states have return successors, (136), 134 states have call predecessors, (136), 134 states have call successors, (136) [2022-01-10 08:20:19,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5993 states to 5993 states and 7433 transitions. [2022-01-10 08:20:19,677 INFO L78 Accepts]: Start accepts. Automaton has 5993 states and 7433 transitions. Word has length 178 [2022-01-10 08:20:19,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:19,678 INFO L470 AbstractCegarLoop]: Abstraction has 5993 states and 7433 transitions. [2022-01-10 08:20:19,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:19,678 INFO L276 IsEmpty]: Start isEmpty. Operand 5993 states and 7433 transitions. [2022-01-10 08:20:19,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:20:19,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:19,679 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:19,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:19,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:19,888 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:19,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:19,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1659129406, now seen corresponding path program 1 times [2022-01-10 08:20:19,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:19,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [831073711] [2022-01-10 08:20:19,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:19,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:19,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:19,891 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:19,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-01-10 08:20:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:20,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:20,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:20,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:20,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:20,249 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:20,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [831073711] [2022-01-10 08:20:20,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [831073711] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:20,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:20,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:20:20,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436354280] [2022-01-10 08:20:20,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:20,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:20,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:20,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:20,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:20,251 INFO L87 Difference]: Start difference. First operand 5993 states and 7433 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:20,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:20,816 INFO L93 Difference]: Finished difference Result 12272 states and 15329 transitions. [2022-01-10 08:20:20,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:20,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:20:20,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:20,829 INFO L225 Difference]: With dead ends: 12272 [2022-01-10 08:20:20,829 INFO L226 Difference]: Without dead ends: 6301 [2022-01-10 08:20:20,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:20:20,838 INFO L933 BasicCegarLoop]: 525 mSDtfsCounter, 205 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 2174 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:20,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 2174 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:20,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6301 states. [2022-01-10 08:20:21,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6301 to 6005. [2022-01-10 08:20:21,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6005 states, 5752 states have (on average 1.2393949930458972) internal successors, (7129), 5755 states have internal predecessors, (7129), 134 states have call successors, (134), 116 states have call predecessors, (134), 118 states have return successors, (136), 134 states have call predecessors, (136), 134 states have call successors, (136) [2022-01-10 08:20:21,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6005 states to 6005 states and 7399 transitions. [2022-01-10 08:20:21,345 INFO L78 Accepts]: Start accepts. Automaton has 6005 states and 7399 transitions. Word has length 178 [2022-01-10 08:20:21,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:21,346 INFO L470 AbstractCegarLoop]: Abstraction has 6005 states and 7399 transitions. [2022-01-10 08:20:21,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:21,346 INFO L276 IsEmpty]: Start isEmpty. Operand 6005 states and 7399 transitions. [2022-01-10 08:20:21,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:20:21,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:21,347 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:21,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:21,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:21,555 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:21,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:21,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1899369152, now seen corresponding path program 1 times [2022-01-10 08:20:21,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:21,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638281003] [2022-01-10 08:20:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:21,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:21,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:21,557 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:21,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-01-10 08:20:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:21,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:21,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:21,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:21,899 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:21,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638281003] [2022-01-10 08:20:21,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638281003] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:21,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:21,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:20:21,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099160017] [2022-01-10 08:20:21,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:21,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:21,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:21,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:21,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:21,900 INFO L87 Difference]: Start difference. First operand 6005 states and 7399 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:22,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:22,434 INFO L93 Difference]: Finished difference Result 12240 states and 15189 transitions. [2022-01-10 08:20:22,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:22,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:20:22,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:22,448 INFO L225 Difference]: With dead ends: 12240 [2022-01-10 08:20:22,448 INFO L226 Difference]: Without dead ends: 6257 [2022-01-10 08:20:22,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:20:22,458 INFO L933 BasicCegarLoop]: 525 mSDtfsCounter, 166 mSDsluCounter, 1634 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 2159 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:22,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 2159 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:22,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6257 states. [2022-01-10 08:20:22,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6257 to 6017. [2022-01-10 08:20:22,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6017 states, 5764 states have (on average 1.2309160305343512) internal successors, (7095), 5767 states have internal predecessors, (7095), 134 states have call successors, (134), 116 states have call predecessors, (134), 118 states have return successors, (136), 134 states have call predecessors, (136), 134 states have call successors, (136) [2022-01-10 08:20:22,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6017 states to 6017 states and 7365 transitions. [2022-01-10 08:20:22,971 INFO L78 Accepts]: Start accepts. Automaton has 6017 states and 7365 transitions. Word has length 178 [2022-01-10 08:20:22,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:22,971 INFO L470 AbstractCegarLoop]: Abstraction has 6017 states and 7365 transitions. [2022-01-10 08:20:22,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:22,971 INFO L276 IsEmpty]: Start isEmpty. Operand 6017 states and 7365 transitions. [2022-01-10 08:20:22,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:20:22,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:22,972 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:22,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:23,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:23,180 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:23,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:23,182 INFO L85 PathProgramCache]: Analyzing trace with hash -11673406, now seen corresponding path program 1 times [2022-01-10 08:20:23,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:23,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1727877024] [2022-01-10 08:20:23,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:23,182 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:23,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:23,183 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:23,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-01-10 08:20:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:23,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:23,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:23,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:23,526 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:23,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1727877024] [2022-01-10 08:20:23,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1727877024] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:23,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:23,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:20:23,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159629061] [2022-01-10 08:20:23,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:23,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:23,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:23,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:23,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:23,528 INFO L87 Difference]: Start difference. First operand 6017 states and 7365 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:24,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:24,069 INFO L93 Difference]: Finished difference Result 12208 states and 15049 transitions. [2022-01-10 08:20:24,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:24,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:20:24,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:24,080 INFO L225 Difference]: With dead ends: 12208 [2022-01-10 08:20:24,080 INFO L226 Difference]: Without dead ends: 6213 [2022-01-10 08:20:24,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:20:24,086 INFO L933 BasicCegarLoop]: 525 mSDtfsCounter, 127 mSDsluCounter, 1619 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 2144 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:24,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 2144 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:24,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6213 states. [2022-01-10 08:20:24,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6213 to 6029. [2022-01-10 08:20:24,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6029 states, 5776 states have (on average 1.2224722991689752) internal successors, (7061), 5779 states have internal predecessors, (7061), 134 states have call successors, (134), 116 states have call predecessors, (134), 118 states have return successors, (136), 134 states have call predecessors, (136), 134 states have call successors, (136) [2022-01-10 08:20:24,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6029 states to 6029 states and 7331 transitions. [2022-01-10 08:20:24,574 INFO L78 Accepts]: Start accepts. Automaton has 6029 states and 7331 transitions. Word has length 178 [2022-01-10 08:20:24,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:24,574 INFO L470 AbstractCegarLoop]: Abstraction has 6029 states and 7331 transitions. [2022-01-10 08:20:24,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:24,574 INFO L276 IsEmpty]: Start isEmpty. Operand 6029 states and 7331 transitions. [2022-01-10 08:20:24,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:20:24,575 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:24,575 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:24,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:24,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:24,782 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:24,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:24,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1227827132, now seen corresponding path program 1 times [2022-01-10 08:20:24,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:24,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262648296] [2022-01-10 08:20:24,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:24,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:24,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:24,785 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:24,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-01-10 08:20:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:24,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:24,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:25,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:25,167 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:25,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262648296] [2022-01-10 08:20:25,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262648296] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:25,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:25,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:20:25,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391012904] [2022-01-10 08:20:25,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:25,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:25,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:25,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:25,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:25,169 INFO L87 Difference]: Start difference. First operand 6029 states and 7331 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:25,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:25,861 INFO L93 Difference]: Finished difference Result 12176 states and 14909 transitions. [2022-01-10 08:20:25,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:25,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:20:25,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:25,877 INFO L225 Difference]: With dead ends: 12176 [2022-01-10 08:20:25,877 INFO L226 Difference]: Without dead ends: 6169 [2022-01-10 08:20:25,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:20:25,887 INFO L933 BasicCegarLoop]: 525 mSDtfsCounter, 88 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 2129 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:25,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 2129 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:25,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6169 states. [2022-01-10 08:20:26,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6169 to 6041. [2022-01-10 08:20:26,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6041 states, 5788 states have (on average 1.2140635798203179) internal successors, (7027), 5791 states have internal predecessors, (7027), 134 states have call successors, (134), 116 states have call predecessors, (134), 118 states have return successors, (136), 134 states have call predecessors, (136), 134 states have call successors, (136) [2022-01-10 08:20:26,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6041 states to 6041 states and 7297 transitions. [2022-01-10 08:20:26,444 INFO L78 Accepts]: Start accepts. Automaton has 6041 states and 7297 transitions. Word has length 178 [2022-01-10 08:20:26,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:26,444 INFO L470 AbstractCegarLoop]: Abstraction has 6041 states and 7297 transitions. [2022-01-10 08:20:26,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:26,444 INFO L276 IsEmpty]: Start isEmpty. Operand 6041 states and 7297 transitions. [2022-01-10 08:20:26,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:20:26,445 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:26,445 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:26,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:26,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:26,649 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:26,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:26,650 INFO L85 PathProgramCache]: Analyzing trace with hash 733747526, now seen corresponding path program 1 times [2022-01-10 08:20:26,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:26,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93933626] [2022-01-10 08:20:26,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:26,650 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:26,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:26,652 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:26,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-01-10 08:20:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:26,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:26,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:26,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:26,932 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:26,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93933626] [2022-01-10 08:20:26,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93933626] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:26,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:26,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:20:26,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140123975] [2022-01-10 08:20:26,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:26,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:26,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:26,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:26,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:26,933 INFO L87 Difference]: Start difference. First operand 6041 states and 7297 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:27,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:27,445 INFO L93 Difference]: Finished difference Result 12088 states and 14697 transitions. [2022-01-10 08:20:27,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:27,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:20:27,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:27,457 INFO L225 Difference]: With dead ends: 12088 [2022-01-10 08:20:27,457 INFO L226 Difference]: Without dead ends: 6069 [2022-01-10 08:20:27,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:20:27,467 INFO L933 BasicCegarLoop]: 525 mSDtfsCounter, 10 mSDsluCounter, 1574 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2099 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:27,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 2099 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:27,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6069 states. [2022-01-10 08:20:28,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6069 to 6053. [2022-01-10 08:20:28,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6053 states, 5800 states have (on average 1.2056896551724139) internal successors, (6993), 5803 states have internal predecessors, (6993), 134 states have call successors, (134), 116 states have call predecessors, (134), 118 states have return successors, (136), 134 states have call predecessors, (136), 134 states have call successors, (136) [2022-01-10 08:20:28,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6053 states to 6053 states and 7263 transitions. [2022-01-10 08:20:28,056 INFO L78 Accepts]: Start accepts. Automaton has 6053 states and 7263 transitions. Word has length 178 [2022-01-10 08:20:28,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:28,056 INFO L470 AbstractCegarLoop]: Abstraction has 6053 states and 7263 transitions. [2022-01-10 08:20:28,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:28,057 INFO L276 IsEmpty]: Start isEmpty. Operand 6053 states and 7263 transitions. [2022-01-10 08:20:28,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:20:28,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:28,058 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:28,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:28,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:28,266 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:28,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:28,266 INFO L85 PathProgramCache]: Analyzing trace with hash 718228808, now seen corresponding path program 1 times [2022-01-10 08:20:28,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:28,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239034370] [2022-01-10 08:20:28,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:28,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:28,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:28,268 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:28,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-01-10 08:20:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:28,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:20:28,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:28,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:28,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:28,677 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:28,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239034370] [2022-01-10 08:20:28,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239034370] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:28,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:28,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:28,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381595963] [2022-01-10 08:20:28,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:28,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:28,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:28,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:28,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:28,678 INFO L87 Difference]: Start difference. First operand 6053 states and 7263 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:29,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:29,530 INFO L93 Difference]: Finished difference Result 12085 states and 14504 transitions. [2022-01-10 08:20:29,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:20:29,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:20:29,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:29,541 INFO L225 Difference]: With dead ends: 12085 [2022-01-10 08:20:29,541 INFO L226 Difference]: Without dead ends: 6053 [2022-01-10 08:20:29,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:20:29,547 INFO L933 BasicCegarLoop]: 496 mSDtfsCounter, 590 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:29,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 1053 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:20:29,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6053 states. [2022-01-10 08:20:30,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6053 to 6053. [2022-01-10 08:20:30,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6053 states, 5800 states have (on average 1.2032758620689654) internal successors, (6979), 5803 states have internal predecessors, (6979), 134 states have call successors, (134), 116 states have call predecessors, (134), 118 states have return successors, (136), 134 states have call predecessors, (136), 134 states have call successors, (136) [2022-01-10 08:20:30,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6053 states to 6053 states and 7249 transitions. [2022-01-10 08:20:30,070 INFO L78 Accepts]: Start accepts. Automaton has 6053 states and 7249 transitions. Word has length 178 [2022-01-10 08:20:30,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:30,070 INFO L470 AbstractCegarLoop]: Abstraction has 6053 states and 7249 transitions. [2022-01-10 08:20:30,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:30,070 INFO L276 IsEmpty]: Start isEmpty. Operand 6053 states and 7249 transitions. [2022-01-10 08:20:30,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:20:30,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:30,071 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:30,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-01-10 08:20:30,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:30,280 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:30,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:30,280 INFO L85 PathProgramCache]: Analyzing trace with hash -179164470, now seen corresponding path program 1 times [2022-01-10 08:20:30,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:30,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012831284] [2022-01-10 08:20:30,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:30,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:30,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:30,282 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:30,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-01-10 08:20:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:30,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:20:30,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:30,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:30,677 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:30,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012831284] [2022-01-10 08:20:30,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012831284] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:30,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:30,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:30,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770984284] [2022-01-10 08:20:30,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:30,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:30,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:30,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:30,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:30,678 INFO L87 Difference]: Start difference. First operand 6053 states and 7249 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:31,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:31,647 INFO L93 Difference]: Finished difference Result 12085 states and 14476 transitions. [2022-01-10 08:20:31,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:20:31,648 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:20:31,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:31,660 INFO L225 Difference]: With dead ends: 12085 [2022-01-10 08:20:31,660 INFO L226 Difference]: Without dead ends: 6053 [2022-01-10 08:20:31,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:20:31,668 INFO L933 BasicCegarLoop]: 493 mSDtfsCounter, 577 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:31,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 1046 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:20:31,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6053 states. [2022-01-10 08:20:32,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6053 to 6053. [2022-01-10 08:20:32,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6053 states, 5800 states have (on average 1.2008620689655172) internal successors, (6965), 5803 states have internal predecessors, (6965), 134 states have call successors, (134), 116 states have call predecessors, (134), 118 states have return successors, (136), 134 states have call predecessors, (136), 134 states have call successors, (136) [2022-01-10 08:20:32,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6053 states to 6053 states and 7235 transitions. [2022-01-10 08:20:32,196 INFO L78 Accepts]: Start accepts. Automaton has 6053 states and 7235 transitions. Word has length 178 [2022-01-10 08:20:32,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:32,196 INFO L470 AbstractCegarLoop]: Abstraction has 6053 states and 7235 transitions. [2022-01-10 08:20:32,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:32,196 INFO L276 IsEmpty]: Start isEmpty. Operand 6053 states and 7235 transitions. [2022-01-10 08:20:32,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:20:32,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:32,197 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:32,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:32,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:32,405 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:32,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:32,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1023169972, now seen corresponding path program 1 times [2022-01-10 08:20:32,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:32,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [870370176] [2022-01-10 08:20:32,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:32,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:32,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:32,407 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:32,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-01-10 08:20:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:32,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:20:32,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:32,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:32,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:32,881 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:32,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [870370176] [2022-01-10 08:20:32,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [870370176] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:32,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:32,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:32,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393150092] [2022-01-10 08:20:32,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:32,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:32,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:32,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:32,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:32,882 INFO L87 Difference]: Start difference. First operand 6053 states and 7235 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:33,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:33,902 INFO L93 Difference]: Finished difference Result 12489 states and 14951 transitions. [2022-01-10 08:20:33,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:33,902 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2022-01-10 08:20:33,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:33,916 INFO L225 Difference]: With dead ends: 12489 [2022-01-10 08:20:33,917 INFO L226 Difference]: Without dead ends: 6457 [2022-01-10 08:20:33,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:20:33,926 INFO L933 BasicCegarLoop]: 552 mSDtfsCounter, 730 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:33,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 1100 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:20:33,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6457 states. [2022-01-10 08:20:34,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6457 to 6351. [2022-01-10 08:20:34,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6351 states, 6094 states have (on average 1.1905152609123728) internal successors, (7255), 6097 states have internal predecessors, (7255), 134 states have call successors, (134), 120 states have call predecessors, (134), 122 states have return successors, (136), 134 states have call predecessors, (136), 134 states have call successors, (136) [2022-01-10 08:20:34,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6351 states to 6351 states and 7525 transitions. [2022-01-10 08:20:34,530 INFO L78 Accepts]: Start accepts. Automaton has 6351 states and 7525 transitions. Word has length 178 [2022-01-10 08:20:34,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:34,531 INFO L470 AbstractCegarLoop]: Abstraction has 6351 states and 7525 transitions. [2022-01-10 08:20:34,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:34,531 INFO L276 IsEmpty]: Start isEmpty. Operand 6351 states and 7525 transitions. [2022-01-10 08:20:34,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 08:20:34,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:34,532 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:34,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:34,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:34,740 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:34,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:34,740 INFO L85 PathProgramCache]: Analyzing trace with hash 900058062, now seen corresponding path program 1 times [2022-01-10 08:20:34,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:34,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304892543] [2022-01-10 08:20:34,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:34,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:34,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:34,742 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:34,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-01-10 08:20:34,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:34,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:20:34,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:35,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:35,124 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:35,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304892543] [2022-01-10 08:20:35,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304892543] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:35,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:35,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:20:35,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049386146] [2022-01-10 08:20:35,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:35,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:20:35,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:35,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:20:35,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:20:35,125 INFO L87 Difference]: Start difference. First operand 6351 states and 7525 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 08:20:36,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:36,566 INFO L93 Difference]: Finished difference Result 18928 states and 22513 transitions. [2022-01-10 08:20:36,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:20:36,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 178 [2022-01-10 08:20:36,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:36,596 INFO L225 Difference]: With dead ends: 18928 [2022-01-10 08:20:36,596 INFO L226 Difference]: Without dead ends: 12599 [2022-01-10 08:20:36,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:20:36,610 INFO L933 BasicCegarLoop]: 539 mSDtfsCounter, 333 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:36,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 1013 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:36,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12599 states. [2022-01-10 08:20:38,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12599 to 12595. [2022-01-10 08:20:38,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12595 states, 12086 states have (on average 1.1850901869932153) internal successors, (14323), 12095 states have internal predecessors, (14323), 264 states have call successors, (264), 240 states have call predecessors, (264), 244 states have return successors, (268), 260 states have call predecessors, (268), 264 states have call successors, (268) [2022-01-10 08:20:38,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12595 states to 12595 states and 14855 transitions. [2022-01-10 08:20:38,092 INFO L78 Accepts]: Start accepts. Automaton has 12595 states and 14855 transitions. Word has length 178 [2022-01-10 08:20:38,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:38,092 INFO L470 AbstractCegarLoop]: Abstraction has 12595 states and 14855 transitions. [2022-01-10 08:20:38,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 08:20:38,092 INFO L276 IsEmpty]: Start isEmpty. Operand 12595 states and 14855 transitions. [2022-01-10 08:20:38,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-10 08:20:38,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:38,120 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:38,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:38,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:38,329 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:38,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:38,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1814079592, now seen corresponding path program 1 times [2022-01-10 08:20:38,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:38,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703873492] [2022-01-10 08:20:38,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:38,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:38,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:38,331 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:38,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-01-10 08:20:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:38,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:20:38,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:38,872 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 08:20:38,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:38,872 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:38,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703873492] [2022-01-10 08:20:38,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703873492] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:38,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:38,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:20:38,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550950779] [2022-01-10 08:20:38,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:38,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:20:38,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:38,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:20:38,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:20:38,874 INFO L87 Difference]: Start difference. First operand 12595 states and 14855 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 2 states have internal predecessors, (267), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 08:20:41,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:41,261 INFO L93 Difference]: Finished difference Result 36816 states and 43620 transitions. [2022-01-10 08:20:41,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:20:41,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 2 states have internal predecessors, (267), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 290 [2022-01-10 08:20:41,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:41,307 INFO L225 Difference]: With dead ends: 36816 [2022-01-10 08:20:41,308 INFO L226 Difference]: Without dead ends: 24243 [2022-01-10 08:20:41,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:20:41,330 INFO L933 BasicCegarLoop]: 587 mSDtfsCounter, 326 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:41,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 1061 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:41,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24243 states. [2022-01-10 08:20:43,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24243 to 24225. [2022-01-10 08:20:43,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24225 states, 23244 states have (on average 1.1811650318361728) internal successors, (27455), 23261 states have internal predecessors, (27455), 508 states have call successors, (508), 464 states have call predecessors, (508), 472 states have return successors, (516), 500 states have call predecessors, (516), 508 states have call successors, (516) [2022-01-10 08:20:43,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24225 states to 24225 states and 28479 transitions. [2022-01-10 08:20:43,789 INFO L78 Accepts]: Start accepts. Automaton has 24225 states and 28479 transitions. Word has length 290 [2022-01-10 08:20:43,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:43,789 INFO L470 AbstractCegarLoop]: Abstraction has 24225 states and 28479 transitions. [2022-01-10 08:20:43,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 2 states have internal predecessors, (267), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 08:20:43,789 INFO L276 IsEmpty]: Start isEmpty. Operand 24225 states and 28479 transitions. [2022-01-10 08:20:43,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-10 08:20:43,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:43,801 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:43,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:44,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:44,011 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:44,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:44,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1154235915, now seen corresponding path program 1 times [2022-01-10 08:20:44,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:44,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403267227] [2022-01-10 08:20:44,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:44,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:44,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:44,013 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:44,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-01-10 08:20:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:44,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:20:44,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-01-10 08:20:44,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:44,692 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:44,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403267227] [2022-01-10 08:20:44,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403267227] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:44,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:44,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:44,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231608302] [2022-01-10 08:20:44,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:44,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:20:44,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:44,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:20:44,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:20:44,693 INFO L87 Difference]: Start difference. First operand 24225 states and 28479 transitions. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)