/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/Problem05_label45+token_ring.05.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 07:45:19,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 07:45:19,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 07:45:19,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 07:45:19,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 07:45:19,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 07:45:19,144 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 07:45:19,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 07:45:19,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 07:45:19,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 07:45:19,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 07:45:19,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 07:45:19,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 07:45:19,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 07:45:19,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 07:45:19,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 07:45:19,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 07:45:19,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 07:45:19,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 07:45:19,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 07:45:19,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 07:45:19,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 07:45:19,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 07:45:19,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 07:45:19,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 07:45:19,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 07:45:19,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 07:45:19,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 07:45:19,182 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 07:45:19,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 07:45:19,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 07:45:19,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 07:45:19,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 07:45:19,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 07:45:19,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 07:45:19,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 07:45:19,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 07:45:19,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 07:45:19,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 07:45:19,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 07:45:19,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 07:45:19,208 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 07:45:19,246 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 07:45:19,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 07:45:19,246 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 07:45:19,246 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 07:45:19,247 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 07:45:19,247 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 07:45:19,247 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 07:45:19,247 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 07:45:19,248 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 07:45:19,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 07:45:19,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 07:45:19,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 07:45:19,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 07:45:19,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 07:45:19,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 07:45:19,248 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 07:45:19,249 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 07:45:19,249 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 07:45:19,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 07:45:19,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 07:45:19,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 07:45:19,249 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 07:45:19,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 07:45:19,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 07:45:19,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 07:45:19,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 07:45:19,250 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 07:45:19,250 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 07:45:19,250 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 07:45:19,250 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 07:45:19,250 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 07:45:19,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 07:45:19,250 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 07:45:19,251 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 07:45:19,483 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 07:45:19,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 07:45:19,506 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 07:45:19,506 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 07:45:19,508 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 07:45:19,509 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/Problem05_label45+token_ring.05.cil-2.c [2022-01-10 07:45:19,563 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7a8d712c/d6d04443a7eb4b4c9705604522390696/FLAG2b7b6cf02 [2022-01-10 07:45:20,399 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 07:45:20,399 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/Problem05_label45+token_ring.05.cil-2.c [2022-01-10 07:45:20,446 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7a8d712c/d6d04443a7eb4b4c9705604522390696/FLAG2b7b6cf02 [2022-01-10 07:45:20,854 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7a8d712c/d6d04443a7eb4b4c9705604522390696 [2022-01-10 07:45:20,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 07:45:20,858 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 07:45:20,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 07:45:20,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 07:45:20,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 07:45:20,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:45:20" (1/1) ... [2022-01-10 07:45:20,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f5ee7fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:45:20, skipping insertion in model container [2022-01-10 07:45:20,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:45:20" (1/1) ... [2022-01-10 07:45:20,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 07:45:21,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 07:45:22,665 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/Problem05_label45+token_ring.05.cil-2.c[380323,380336] [2022-01-10 07:45:22,693 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/Problem05_label45+token_ring.05.cil-2.c[383339,383352] [2022-01-10 07:45:22,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 07:45:22,887 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 07:45:23,766 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/Problem05_label45+token_ring.05.cil-2.c[380323,380336] [2022-01-10 07:45:23,773 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/Problem05_label45+token_ring.05.cil-2.c[383339,383352] [2022-01-10 07:45:23,797 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 07:45:23,851 INFO L208 MainTranslator]: Completed translation [2022-01-10 07:45:23,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:45:23 WrapperNode [2022-01-10 07:45:23,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 07:45:23,853 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 07:45:23,853 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 07:45:23,853 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 07:45:23,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:45:23" (1/1) ... [2022-01-10 07:45:23,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:45:23" (1/1) ... [2022-01-10 07:45:24,346 INFO L137 Inliner]: procedures = 55, calls = 57, calls flagged for inlining = 31, calls inlined = 31, statements flattened = 12769 [2022-01-10 07:45:24,347 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 07:45:24,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 07:45:24,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 07:45:24,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 07:45:24,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:45:23" (1/1) ... [2022-01-10 07:45:24,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:45:23" (1/1) ... [2022-01-10 07:45:24,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:45:23" (1/1) ... [2022-01-10 07:45:24,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:45:23" (1/1) ... [2022-01-10 07:45:24,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:45:23" (1/1) ... [2022-01-10 07:45:24,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:45:23" (1/1) ... [2022-01-10 07:45:24,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:45:23" (1/1) ... [2022-01-10 07:45:24,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 07:45:24,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 07:45:24,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 07:45:24,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 07:45:24,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:45:23" (1/1) ... [2022-01-10 07:45:24,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 07:45:24,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 07:45:24,925 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 07:45:24,944 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 07:45:24,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 07:45:24,959 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-01-10 07:45:24,959 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-01-10 07:45:24,959 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-01-10 07:45:24,959 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-01-10 07:45:24,959 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-01-10 07:45:24,959 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-01-10 07:45:24,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 07:45:24,959 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-01-10 07:45:24,959 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-01-10 07:45:24,959 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-01-10 07:45:24,959 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-01-10 07:45:24,959 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-01-10 07:45:24,960 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-01-10 07:45:24,960 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-01-10 07:45:24,960 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-01-10 07:45:24,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 07:45:24,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 07:45:25,075 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 07:45:25,076 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 07:45:32,931 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 07:45:32,963 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 07:45:32,963 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-01-10 07:45:32,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:45:32 BoogieIcfgContainer [2022-01-10 07:45:32,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 07:45:32,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 07:45:32,969 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 07:45:32,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 07:45:32,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 07:45:20" (1/3) ... [2022-01-10 07:45:32,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dfa987e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:45:32, skipping insertion in model container [2022-01-10 07:45:32,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:45:23" (2/3) ... [2022-01-10 07:45:32,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dfa987e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:45:32, skipping insertion in model container [2022-01-10 07:45:32,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:45:32" (3/3) ... [2022-01-10 07:45:32,975 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.05.cil-2.c [2022-01-10 07:45:32,980 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 07:45:32,980 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 07:45:33,117 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 07:45:33,123 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 07:45:33,123 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 07:45:33,176 INFO L276 IsEmpty]: Start isEmpty. Operand has 2398 states, 2367 states have (on average 1.85297845373891) internal successors, (4386), 2372 states have internal predecessors, (4386), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-10 07:45:33,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 07:45:33,186 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:45:33,186 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] [2022-01-10 07:45:33,187 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:45:33,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:45:33,191 INFO L85 PathProgramCache]: Analyzing trace with hash -645844934, now seen corresponding path program 1 times [2022-01-10 07:45:33,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:45:33,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174066864] [2022-01-10 07:45:33,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:45:33,203 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:45:33,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:45:33,210 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 07:45:33,211 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 07:45:33,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:45:33,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:45:33,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:45:33,637 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 07:45:33,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:45:33,637 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:45:33,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174066864] [2022-01-10 07:45:33,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174066864] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:45:33,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:45:33,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:45:33,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806446917] [2022-01-10 07:45:33,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:45:33,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:45:33,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:45:33,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:45:33,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:45:33,688 INFO L87 Difference]: Start difference. First operand has 2398 states, 2367 states have (on average 1.85297845373891) internal successors, (4386), 2372 states have internal predecessors, (4386), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:45:33,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:45:33,950 INFO L93 Difference]: Finished difference Result 4787 states and 8841 transitions. [2022-01-10 07:45:33,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:45:33,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-01-10 07:45:33,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:45:33,984 INFO L225 Difference]: With dead ends: 4787 [2022-01-10 07:45:33,984 INFO L226 Difference]: Without dead ends: 2330 [2022-01-10 07:45:33,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 100 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 07:45:33,995 INFO L933 BasicCegarLoop]: 4345 mSDtfsCounter, 314 mSDsluCounter, 4022 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 8367 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 07:45:33,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 8367 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:45:34,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2022-01-10 07:45:34,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 2330. [2022-01-10 07:45:34,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2301 states have (on average 1.841373315949587) internal successors, (4237), 2304 states have internal predecessors, (4237), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-10 07:45:34,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 4277 transitions. [2022-01-10 07:45:34,135 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 4277 transitions. Word has length 102 [2022-01-10 07:45:34,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:45:34,136 INFO L470 AbstractCegarLoop]: Abstraction has 2330 states and 4277 transitions. [2022-01-10 07:45:34,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:45:34,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 4277 transitions. [2022-01-10 07:45:34,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 07:45:34,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:45:34,140 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] [2022-01-10 07:45:34,151 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 07:45:34,341 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 07:45:34,342 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:45:34,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:45:34,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1294737080, now seen corresponding path program 1 times [2022-01-10 07:45:34,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:45:34,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330355959] [2022-01-10 07:45:34,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:45:34,344 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:45:34,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:45:34,346 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 07:45:34,347 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 07:45:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:45:34,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:45:34,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:45:34,684 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 07:45:34,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:45:34,684 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:45:34,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330355959] [2022-01-10 07:45:34,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330355959] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:45:34,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:45:34,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:45:34,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100573286] [2022-01-10 07:45:34,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:45:34,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:45:34,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:45:34,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:45:34,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:45:34,690 INFO L87 Difference]: Start difference. First operand 2330 states and 4277 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 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 07:45:35,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:45:35,182 INFO L93 Difference]: Finished difference Result 2742 states and 4917 transitions. [2022-01-10 07:45:35,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:45:35,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 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 102 [2022-01-10 07:45:35,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:45:35,198 INFO L225 Difference]: With dead ends: 2742 [2022-01-10 07:45:35,198 INFO L226 Difference]: Without dead ends: 2546 [2022-01-10 07:45:35,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 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 07:45:35,203 INFO L933 BasicCegarLoop]: 4299 mSDtfsCounter, 4524 mSDsluCounter, 8538 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4537 SdHoareTripleChecker+Valid, 12837 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 07:45:35,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4537 Valid, 12837 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 07:45:35,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2022-01-10 07:45:35,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 2529. [2022-01-10 07:45:35,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2479 states have (on average 1.8217022993142395) internal successors, (4516), 2483 states have internal predecessors, (4516), 35 states have call successors, (35), 13 states have call predecessors, (35), 13 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2022-01-10 07:45:35,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 4585 transitions. [2022-01-10 07:45:35,283 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 4585 transitions. Word has length 102 [2022-01-10 07:45:35,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:45:35,284 INFO L470 AbstractCegarLoop]: Abstraction has 2529 states and 4585 transitions. [2022-01-10 07:45:35,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 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 07:45:35,284 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 4585 transitions. [2022-01-10 07:45:35,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 07:45:35,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:45:35,289 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] [2022-01-10 07:45:35,299 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 07:45:35,499 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 07:45:35,499 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:45:35,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:45:35,500 INFO L85 PathProgramCache]: Analyzing trace with hash -389078092, now seen corresponding path program 1 times [2022-01-10 07:45:35,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:45:35,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078872763] [2022-01-10 07:45:35,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:45:35,501 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:45:35,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:45:35,502 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 07:45:35,505 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 07:45:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:45:35,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:45:35,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:45:35,811 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 07:45:35,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:45:35,812 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:45:35,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078872763] [2022-01-10 07:45:35,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078872763] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:45:35,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:45:35,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:45:35,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068648939] [2022-01-10 07:45:35,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:45:35,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:45:35,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:45:35,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:45:35,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:45:35,814 INFO L87 Difference]: Start difference. First operand 2529 states and 4585 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 07:45:36,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:45:36,096 INFO L93 Difference]: Finished difference Result 2924 states and 5199 transitions. [2022-01-10 07:45:36,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:45:36,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 102 [2022-01-10 07:45:36,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:45:36,107 INFO L225 Difference]: With dead ends: 2924 [2022-01-10 07:45:36,108 INFO L226 Difference]: Without dead ends: 2529 [2022-01-10 07:45:36,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 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 07:45:36,110 INFO L933 BasicCegarLoop]: 4252 mSDtfsCounter, 4366 mSDsluCounter, 8257 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4379 SdHoareTripleChecker+Valid, 12509 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:45:36,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4379 Valid, 12509 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:45:36,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2022-01-10 07:45:36,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 2529. [2022-01-10 07:45:36,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2479 states have (on average 1.81887858007261) internal successors, (4509), 2483 states have internal predecessors, (4509), 35 states have call successors, (35), 13 states have call predecessors, (35), 13 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2022-01-10 07:45:36,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 4578 transitions. [2022-01-10 07:45:36,185 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 4578 transitions. Word has length 102 [2022-01-10 07:45:36,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:45:36,186 INFO L470 AbstractCegarLoop]: Abstraction has 2529 states and 4578 transitions. [2022-01-10 07:45:36,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 07:45:36,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 4578 transitions. [2022-01-10 07:45:36,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 07:45:36,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:45:36,188 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] [2022-01-10 07:45:36,200 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 07:45:36,397 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 07:45:36,398 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:45:36,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:45:36,399 INFO L85 PathProgramCache]: Analyzing trace with hash -2105962696, now seen corresponding path program 1 times [2022-01-10 07:45:36,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:45:36,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656048848] [2022-01-10 07:45:36,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:45:36,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:45:36,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:45:36,401 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 07:45:36,403 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 07:45:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:45:36,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:45:36,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:45:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:45:36,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:45:36,670 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:45:36,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656048848] [2022-01-10 07:45:36,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656048848] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:45:36,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:45:36,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:45:36,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117263104] [2022-01-10 07:45:36,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:45:36,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:45:36,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:45:36,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:45:36,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:45:36,676 INFO L87 Difference]: Start difference. First operand 2529 states and 4578 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 07:45:36,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:45:36,976 INFO L93 Difference]: Finished difference Result 2924 states and 5185 transitions. [2022-01-10 07:45:36,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:45:36,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 102 [2022-01-10 07:45:36,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:45:36,989 INFO L225 Difference]: With dead ends: 2924 [2022-01-10 07:45:36,989 INFO L226 Difference]: Without dead ends: 2529 [2022-01-10 07:45:36,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 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 07:45:36,992 INFO L933 BasicCegarLoop]: 4249 mSDtfsCounter, 4359 mSDsluCounter, 8253 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4372 SdHoareTripleChecker+Valid, 12502 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:45:36,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4372 Valid, 12502 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:45:36,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2022-01-10 07:45:37,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 2529. [2022-01-10 07:45:37,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2479 states have (on average 1.8160548608309803) internal successors, (4502), 2483 states have internal predecessors, (4502), 35 states have call successors, (35), 13 states have call predecessors, (35), 13 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2022-01-10 07:45:37,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 4571 transitions. [2022-01-10 07:45:37,062 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 4571 transitions. Word has length 102 [2022-01-10 07:45:37,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:45:37,062 INFO L470 AbstractCegarLoop]: Abstraction has 2529 states and 4571 transitions. [2022-01-10 07:45:37,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 07:45:37,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 4571 transitions. [2022-01-10 07:45:37,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 07:45:37,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:45:37,064 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] [2022-01-10 07:45:37,073 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 07:45:37,273 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 07:45:37,274 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:45:37,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:45:37,275 INFO L85 PathProgramCache]: Analyzing trace with hash 605096892, now seen corresponding path program 1 times [2022-01-10 07:45:37,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:45:37,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1957908329] [2022-01-10 07:45:37,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:45:37,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:45:37,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:45:37,280 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 07:45:37,282 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 07:45:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:45:37,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:45:37,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:45:37,533 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 07:45:37,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:45:37,533 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:45:37,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1957908329] [2022-01-10 07:45:37,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1957908329] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:45:37,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:45:37,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:45:37,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646388410] [2022-01-10 07:45:37,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:45:37,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:45:37,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:45:37,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:45:37,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:45:37,535 INFO L87 Difference]: Start difference. First operand 2529 states and 4571 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 07:45:37,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:45:37,878 INFO L93 Difference]: Finished difference Result 2924 states and 5171 transitions. [2022-01-10 07:45:37,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:45:37,879 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 102 [2022-01-10 07:45:37,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:45:37,889 INFO L225 Difference]: With dead ends: 2924 [2022-01-10 07:45:37,889 INFO L226 Difference]: Without dead ends: 2529 [2022-01-10 07:45:37,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 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 07:45:37,892 INFO L933 BasicCegarLoop]: 4246 mSDtfsCounter, 4353 mSDsluCounter, 8249 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4366 SdHoareTripleChecker+Valid, 12495 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:45:37,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4366 Valid, 12495 Invalid, 194 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [30 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:45:37,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2022-01-10 07:45:37,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 2529. [2022-01-10 07:45:37,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2479 states have (on average 1.8132311415893505) internal successors, (4495), 2483 states have internal predecessors, (4495), 35 states have call successors, (35), 13 states have call predecessors, (35), 13 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2022-01-10 07:45:37,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 4564 transitions. [2022-01-10 07:45:37,963 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 4564 transitions. Word has length 102 [2022-01-10 07:45:37,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:45:37,964 INFO L470 AbstractCegarLoop]: Abstraction has 2529 states and 4564 transitions. [2022-01-10 07:45:37,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 07:45:37,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 4564 transitions. [2022-01-10 07:45:37,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 07:45:37,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:45:37,966 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:45:37,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-01-10 07:45:38,175 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 07:45:38,176 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:45:38,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:45:38,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1662381752, now seen corresponding path program 1 times [2022-01-10 07:45:38,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:45:38,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2091943409] [2022-01-10 07:45:38,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:45:38,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:45:38,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:45:38,179 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 07:45:38,182 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 07:45:38,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:45:38,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:45:38,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:45:38,475 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 07:45:38,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:45:38,475 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:45:38,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2091943409] [2022-01-10 07:45:38,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2091943409] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:45:38,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:45:38,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:45:38,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310338031] [2022-01-10 07:45:38,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:45:38,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:45:38,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:45:38,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:45:38,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:45:38,478 INFO L87 Difference]: Start difference. First operand 2529 states and 4564 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 07:45:38,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:45:38,761 INFO L93 Difference]: Finished difference Result 2924 states and 5157 transitions. [2022-01-10 07:45:38,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:45:38,762 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 102 [2022-01-10 07:45:38,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:45:38,774 INFO L225 Difference]: With dead ends: 2924 [2022-01-10 07:45:38,774 INFO L226 Difference]: Without dead ends: 2529 [2022-01-10 07:45:38,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 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 07:45:38,777 INFO L933 BasicCegarLoop]: 4243 mSDtfsCounter, 4347 mSDsluCounter, 8245 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4360 SdHoareTripleChecker+Valid, 12488 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:45:38,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4360 Valid, 12488 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:45:38,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2022-01-10 07:45:38,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 2529. [2022-01-10 07:45:38,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2479 states have (on average 1.810407422347721) internal successors, (4488), 2483 states have internal predecessors, (4488), 35 states have call successors, (35), 13 states have call predecessors, (35), 13 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2022-01-10 07:45:38,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 4557 transitions. [2022-01-10 07:45:38,856 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 4557 transitions. Word has length 102 [2022-01-10 07:45:38,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:45:38,856 INFO L470 AbstractCegarLoop]: Abstraction has 2529 states and 4557 transitions. [2022-01-10 07:45:38,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 07:45:38,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 4557 transitions. [2022-01-10 07:45:38,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 07:45:38,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:45:38,858 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] [2022-01-10 07:45:38,908 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 07:45:39,066 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 07:45:39,066 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:45:39,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:45:39,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1767195588, now seen corresponding path program 1 times [2022-01-10 07:45:39,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:45:39,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1364113376] [2022-01-10 07:45:39,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:45:39,068 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:45:39,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:45:39,069 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 07:45:39,069 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 07:45:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:45:39,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:45:39,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:45:39,370 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 07:45:39,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:45:39,371 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:45:39,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1364113376] [2022-01-10 07:45:39,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1364113376] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:45:39,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:45:39,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:45:39,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509431406] [2022-01-10 07:45:39,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:45:39,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:45:39,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:45:39,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:45:39,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:45:39,373 INFO L87 Difference]: Start difference. First operand 2529 states and 4557 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 07:45:39,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:45:39,725 INFO L93 Difference]: Finished difference Result 3018 states and 5287 transitions. [2022-01-10 07:45:39,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:45:39,728 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 102 [2022-01-10 07:45:39,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:45:39,744 INFO L225 Difference]: With dead ends: 3018 [2022-01-10 07:45:39,744 INFO L226 Difference]: Without dead ends: 2623 [2022-01-10 07:45:39,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 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 07:45:39,747 INFO L933 BasicCegarLoop]: 4240 mSDtfsCounter, 4397 mSDsluCounter, 8240 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4410 SdHoareTripleChecker+Valid, 12480 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:45:39,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4410 Valid, 12480 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 07:45:39,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2623 states. [2022-01-10 07:45:39,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2623 to 2623. [2022-01-10 07:45:39,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2623 states, 2567 states have (on average 1.7931437475652512) internal successors, (4603), 2571 states have internal predecessors, (4603), 37 states have call successors, (37), 17 states have call predecessors, (37), 17 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) [2022-01-10 07:45:39,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2623 states to 2623 states and 4676 transitions. [2022-01-10 07:45:39,836 INFO L78 Accepts]: Start accepts. Automaton has 2623 states and 4676 transitions. Word has length 102 [2022-01-10 07:45:39,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:45:39,837 INFO L470 AbstractCegarLoop]: Abstraction has 2623 states and 4676 transitions. [2022-01-10 07:45:39,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 07:45:39,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2623 states and 4676 transitions. [2022-01-10 07:45:39,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 07:45:39,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:45:39,839 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] [2022-01-10 07:45:39,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 07:45:40,051 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 07:45:40,052 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:45:40,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:45:40,053 INFO L85 PathProgramCache]: Analyzing trace with hash -2002941607, now seen corresponding path program 1 times [2022-01-10 07:45:40,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:45:40,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264220192] [2022-01-10 07:45:40,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:45:40,054 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:45:40,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:45:40,064 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 07:45:40,066 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 07:45:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:45:40,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:45:40,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:45:40,354 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 07:45:40,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:45:40,354 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:45:40,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264220192] [2022-01-10 07:45:40,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264220192] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:45:40,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:45:40,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:45:40,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631148805] [2022-01-10 07:45:40,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:45:40,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:45:40,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:45:40,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:45:40,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:45:40,359 INFO L87 Difference]: Start difference. First operand 2623 states and 4676 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 07:45:40,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:45:40,725 INFO L93 Difference]: Finished difference Result 3206 states and 5525 transitions. [2022-01-10 07:45:40,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:45:40,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 102 [2022-01-10 07:45:40,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:45:40,738 INFO L225 Difference]: With dead ends: 3206 [2022-01-10 07:45:40,738 INFO L226 Difference]: Without dead ends: 2717 [2022-01-10 07:45:40,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 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 07:45:40,742 INFO L933 BasicCegarLoop]: 4238 mSDtfsCounter, 4390 mSDsluCounter, 8236 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4403 SdHoareTripleChecker+Valid, 12474 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:45:40,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4403 Valid, 12474 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 07:45:40,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2717 states. [2022-01-10 07:45:40,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2717 to 2717. [2022-01-10 07:45:40,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2717 states, 2655 states have (on average 1.775517890772128) internal successors, (4714), 2659 states have internal predecessors, (4714), 39 states have call successors, (39), 21 states have call predecessors, (39), 21 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-01-10 07:45:40,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2717 states to 2717 states and 4791 transitions. [2022-01-10 07:45:40,830 INFO L78 Accepts]: Start accepts. Automaton has 2717 states and 4791 transitions. Word has length 102 [2022-01-10 07:45:40,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:45:40,830 INFO L470 AbstractCegarLoop]: Abstraction has 2717 states and 4791 transitions. [2022-01-10 07:45:40,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 07:45:40,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2717 states and 4791 transitions. [2022-01-10 07:45:40,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 07:45:40,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:45:40,832 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] [2022-01-10 07:45:40,844 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 07:45:41,042 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 07:45:41,042 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:45:41,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:45:41,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1622153251, now seen corresponding path program 1 times [2022-01-10 07:45:41,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:45:41,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [910410165] [2022-01-10 07:45:41,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:45:41,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:45:41,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:45:41,045 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 07:45:41,047 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 07:45:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:45:41,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:45:41,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:45:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:45:41,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:45:41,327 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:45:41,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [910410165] [2022-01-10 07:45:41,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [910410165] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:45:41,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:45:41,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:45:41,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569800901] [2022-01-10 07:45:41,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:45:41,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:45:41,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:45:41,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:45:41,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:45:41,330 INFO L87 Difference]: Start difference. First operand 2717 states and 4791 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 07:45:41,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:45:41,682 INFO L93 Difference]: Finished difference Result 3394 states and 5755 transitions. [2022-01-10 07:45:41,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:45:41,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 102 [2022-01-10 07:45:41,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:45:41,708 INFO L225 Difference]: With dead ends: 3394 [2022-01-10 07:45:41,708 INFO L226 Difference]: Without dead ends: 2811 [2022-01-10 07:45:41,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 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 07:45:41,712 INFO L933 BasicCegarLoop]: 4233 mSDtfsCounter, 4384 mSDsluCounter, 8232 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4397 SdHoareTripleChecker+Valid, 12465 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:45:41,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4397 Valid, 12465 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 07:45:41,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2022-01-10 07:45:41,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 2811. [2022-01-10 07:45:41,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2811 states, 2743 states have (on average 1.7575647101713452) internal successors, (4821), 2747 states have internal predecessors, (4821), 41 states have call successors, (41), 25 states have call predecessors, (41), 25 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2022-01-10 07:45:41,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2811 states to 2811 states and 4902 transitions. [2022-01-10 07:45:41,784 INFO L78 Accepts]: Start accepts. Automaton has 2811 states and 4902 transitions. Word has length 102 [2022-01-10 07:45:41,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:45:41,784 INFO L470 AbstractCegarLoop]: Abstraction has 2811 states and 4902 transitions. [2022-01-10 07:45:41,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 07:45:41,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2811 states and 4902 transitions. [2022-01-10 07:45:41,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 07:45:41,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:45:41,786 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] [2022-01-10 07:45:41,798 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 07:45:41,995 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 07:45:41,995 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:45:41,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:45:41,996 INFO L85 PathProgramCache]: Analyzing trace with hash -2058780488, now seen corresponding path program 1 times [2022-01-10 07:45:41,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:45:41,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1972095326] [2022-01-10 07:45:41,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:45:41,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:45:41,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:45:42,000 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 07:45:42,002 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 07:45:42,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:45:42,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:45:42,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:45:42,277 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 07:45:42,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:45:42,278 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:45:42,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1972095326] [2022-01-10 07:45:42,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1972095326] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:45:42,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:45:42,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:45:42,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82512653] [2022-01-10 07:45:42,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:45:42,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:45:42,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:45:42,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:45:42,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:45:42,280 INFO L87 Difference]: Start difference. First operand 2811 states and 4902 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 07:45:42,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:45:42,693 INFO L93 Difference]: Finished difference Result 3582 states and 5977 transitions. [2022-01-10 07:45:42,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:45:42,694 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 102 [2022-01-10 07:45:42,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:45:42,702 INFO L225 Difference]: With dead ends: 3582 [2022-01-10 07:45:42,702 INFO L226 Difference]: Without dead ends: 2905 [2022-01-10 07:45:42,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 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 07:45:42,705 INFO L933 BasicCegarLoop]: 4230 mSDtfsCounter, 4377 mSDsluCounter, 8228 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4390 SdHoareTripleChecker+Valid, 12458 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:45:42,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4390 Valid, 12458 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 07:45:42,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2022-01-10 07:45:42,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 2905. [2022-01-10 07:45:42,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2905 states, 2831 states have (on average 1.7393147297774638) internal successors, (4924), 2835 states have internal predecessors, (4924), 43 states have call successors, (43), 29 states have call predecessors, (43), 29 states have return successors, (42), 41 states have call predecessors, (42), 41 states have call successors, (42) [2022-01-10 07:45:42,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2905 states to 2905 states and 5009 transitions. [2022-01-10 07:45:42,782 INFO L78 Accepts]: Start accepts. Automaton has 2905 states and 5009 transitions. Word has length 102 [2022-01-10 07:45:42,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:45:42,782 INFO L470 AbstractCegarLoop]: Abstraction has 2905 states and 5009 transitions. [2022-01-10 07:45:42,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 07:45:42,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2905 states and 5009 transitions. [2022-01-10 07:45:42,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 07:45:42,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:45:42,784 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] [2022-01-10 07:45:42,797 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 07:45:42,994 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 07:45:42,994 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:45:42,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:45:42,995 INFO L85 PathProgramCache]: Analyzing trace with hash -243754149, now seen corresponding path program 1 times [2022-01-10 07:45:42,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:45:42,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [571118102] [2022-01-10 07:45:42,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:45:42,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:45:42,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:45:42,997 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 07:45:42,999 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 07:45:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:45:43,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:45:43,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:45:43,295 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 07:45:43,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:45:43,295 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:45:43,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [571118102] [2022-01-10 07:45:43,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [571118102] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:45:43,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:45:43,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:45:43,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708972113] [2022-01-10 07:45:43,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:45:43,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:45:43,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:45:43,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:45:43,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:45:43,297 INFO L87 Difference]: Start difference. First operand 2905 states and 5009 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 07:45:43,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:45:43,659 INFO L93 Difference]: Finished difference Result 3770 states and 6191 transitions. [2022-01-10 07:45:43,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:45:43,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 102 [2022-01-10 07:45:43,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:45:43,669 INFO L225 Difference]: With dead ends: 3770 [2022-01-10 07:45:43,669 INFO L226 Difference]: Without dead ends: 2999 [2022-01-10 07:45:43,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 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 07:45:43,672 INFO L933 BasicCegarLoop]: 4227 mSDtfsCounter, 4369 mSDsluCounter, 8224 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4382 SdHoareTripleChecker+Valid, 12451 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:45:43,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4382 Valid, 12451 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 07:45:43,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2999 states. [2022-01-10 07:45:43,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2999 to 2999. [2022-01-10 07:45:43,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2919 states have (on average 1.7207947927372387) internal successors, (5023), 2923 states have internal predecessors, (5023), 45 states have call successors, (45), 33 states have call predecessors, (45), 33 states have return successors, (44), 43 states have call predecessors, (44), 43 states have call successors, (44) [2022-01-10 07:45:43,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 5112 transitions. [2022-01-10 07:45:43,758 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 5112 transitions. Word has length 102 [2022-01-10 07:45:43,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:45:43,759 INFO L470 AbstractCegarLoop]: Abstraction has 2999 states and 5112 transitions. [2022-01-10 07:45:43,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 07:45:43,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 5112 transitions. [2022-01-10 07:45:43,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 07:45:43,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:45:43,760 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] [2022-01-10 07:45:43,796 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 07:45:43,968 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 07:45:43,968 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:45:43,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:45:43,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1981923970, now seen corresponding path program 1 times [2022-01-10 07:45:43,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:45:43,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334329320] [2022-01-10 07:45:43,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:45:43,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:45:43,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:45:43,971 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 07:45:43,973 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 07:45:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:45:44,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:45:44,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:45:44,252 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 07:45:44,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:45:44,252 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:45:44,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334329320] [2022-01-10 07:45:44,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334329320] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:45:44,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:45:44,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:45:44,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566996810] [2022-01-10 07:45:44,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:45:44,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:45:44,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:45:44,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:45:44,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:45:44,254 INFO L87 Difference]: Start difference. First operand 2999 states and 5112 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:45:44,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:45:44,361 INFO L93 Difference]: Finished difference Result 4017 states and 6472 transitions. [2022-01-10 07:45:44,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:45:44,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-01-10 07:45:44,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:45:44,370 INFO L225 Difference]: With dead ends: 4017 [2022-01-10 07:45:44,370 INFO L226 Difference]: Without dead ends: 3153 [2022-01-10 07:45:44,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 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 07:45:44,374 INFO L933 BasicCegarLoop]: 4247 mSDtfsCounter, 206 mSDsluCounter, 12820 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 17067 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 07:45:44,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 17067 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:45:44,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3153 states. [2022-01-10 07:45:44,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3153 to 3005. [2022-01-10 07:45:44,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3005 states, 2925 states have (on average 1.715897435897436) internal successors, (5019), 2929 states have internal predecessors, (5019), 45 states have call successors, (45), 33 states have call predecessors, (45), 33 states have return successors, (44), 43 states have call predecessors, (44), 43 states have call successors, (44) [2022-01-10 07:45:44,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3005 states to 3005 states and 5108 transitions. [2022-01-10 07:45:44,463 INFO L78 Accepts]: Start accepts. Automaton has 3005 states and 5108 transitions. Word has length 102 [2022-01-10 07:45:44,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:45:44,463 INFO L470 AbstractCegarLoop]: Abstraction has 3005 states and 5108 transitions. [2022-01-10 07:45:44,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:45:44,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3005 states and 5108 transitions. [2022-01-10 07:45:44,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 07:45:44,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:45:44,465 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] [2022-01-10 07:45:44,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-01-10 07:45:44,673 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 07:45:44,674 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:45:44,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:45:44,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1581075900, now seen corresponding path program 1 times [2022-01-10 07:45:44,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:45:44,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522758220] [2022-01-10 07:45:44,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:45:44,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:45:44,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:45:44,677 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 07:45:44,679 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 07:45:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:45:44,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:45:44,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:45:44,948 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 07:45:44,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:45:44,949 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:45:44,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522758220] [2022-01-10 07:45:44,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522758220] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:45:44,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:45:44,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:45:44,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161141864] [2022-01-10 07:45:44,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:45:44,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:45:44,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:45:44,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:45:44,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:45:44,951 INFO L87 Difference]: Start difference. First operand 3005 states and 5108 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:45:45,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:45:45,052 INFO L93 Difference]: Finished difference Result 4001 states and 6428 transitions. [2022-01-10 07:45:45,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:45:45,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-01-10 07:45:45,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:45:45,059 INFO L225 Difference]: With dead ends: 4001 [2022-01-10 07:45:45,059 INFO L226 Difference]: Without dead ends: 3131 [2022-01-10 07:45:45,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 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 07:45:45,063 INFO L933 BasicCegarLoop]: 4247 mSDtfsCounter, 167 mSDsluCounter, 12805 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 17052 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 07:45:45,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 17052 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:45:45,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2022-01-10 07:45:45,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3011. [2022-01-10 07:45:45,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3011 states, 2931 states have (on average 1.711020129648584) internal successors, (5015), 2935 states have internal predecessors, (5015), 45 states have call successors, (45), 33 states have call predecessors, (45), 33 states have return successors, (44), 43 states have call predecessors, (44), 43 states have call successors, (44) [2022-01-10 07:45:45,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 5104 transitions. [2022-01-10 07:45:45,141 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 5104 transitions. Word has length 102 [2022-01-10 07:45:45,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:45:45,142 INFO L470 AbstractCegarLoop]: Abstraction has 3011 states and 5104 transitions. [2022-01-10 07:45:45,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:45:45,142 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 5104 transitions. [2022-01-10 07:45:45,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 07:45:45,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:45:45,143 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] [2022-01-10 07:45:45,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 07:45:45,353 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 07:45:45,353 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:45:45,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:45:45,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1782899834, now seen corresponding path program 1 times [2022-01-10 07:45:45,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:45:45,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593860122] [2022-01-10 07:45:45,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:45:45,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:45:45,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:45:45,356 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 07:45:45,358 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 07:45:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:45:45,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:45:45,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:45:45,622 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 07:45:45,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:45:45,622 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:45:45,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593860122] [2022-01-10 07:45:45,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593860122] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:45:45,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:45:45,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:45:45,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638614023] [2022-01-10 07:45:45,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:45:45,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:45:45,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:45:45,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:45:45,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:45:45,624 INFO L87 Difference]: Start difference. First operand 3011 states and 5104 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:45:45,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:45:45,729 INFO L93 Difference]: Finished difference Result 3985 states and 6384 transitions. [2022-01-10 07:45:45,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:45:45,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-01-10 07:45:45,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:45:45,738 INFO L225 Difference]: With dead ends: 3985 [2022-01-10 07:45:45,738 INFO L226 Difference]: Without dead ends: 3109 [2022-01-10 07:45:45,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 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 07:45:45,743 INFO L933 BasicCegarLoop]: 4247 mSDtfsCounter, 128 mSDsluCounter, 12790 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 17037 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 07:45:45,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 17037 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:45:45,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2022-01-10 07:45:45,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 3017. [2022-01-10 07:45:45,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 2937 states have (on average 1.7061627511065713) internal successors, (5011), 2941 states have internal predecessors, (5011), 45 states have call successors, (45), 33 states have call predecessors, (45), 33 states have return successors, (44), 43 states have call predecessors, (44), 43 states have call successors, (44) [2022-01-10 07:45:45,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 5100 transitions. [2022-01-10 07:45:45,832 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 5100 transitions. Word has length 102 [2022-01-10 07:45:45,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:45:45,832 INFO L470 AbstractCegarLoop]: Abstraction has 3017 states and 5100 transitions. [2022-01-10 07:45:45,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:45:45,833 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 5100 transitions. [2022-01-10 07:45:45,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 07:45:45,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:45:45,834 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] [2022-01-10 07:45:45,845 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 07:45:46,045 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 07:45:46,046 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:45:46,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:45:46,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1636048456, now seen corresponding path program 1 times [2022-01-10 07:45:46,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:45:46,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145828525] [2022-01-10 07:45:46,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:45:46,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:45:46,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:45:46,048 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 07:45:46,050 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 07:45:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:45:46,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:45:46,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:45:46,304 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 07:45:46,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:45:46,305 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:45:46,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145828525] [2022-01-10 07:45:46,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145828525] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:45:46,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:45:46,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:45:46,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341630310] [2022-01-10 07:45:46,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:45:46,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:45:46,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:45:46,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:45:46,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:45:46,307 INFO L87 Difference]: Start difference. First operand 3017 states and 5100 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:45:46,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:45:46,414 INFO L93 Difference]: Finished difference Result 3969 states and 6340 transitions. [2022-01-10 07:45:46,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:45:46,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-01-10 07:45:46,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:45:46,422 INFO L225 Difference]: With dead ends: 3969 [2022-01-10 07:45:46,422 INFO L226 Difference]: Without dead ends: 3087 [2022-01-10 07:45:46,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 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 07:45:46,427 INFO L933 BasicCegarLoop]: 4247 mSDtfsCounter, 89 mSDsluCounter, 12775 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 17022 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 07:45:46,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 17022 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:45:46,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3087 states. [2022-01-10 07:45:46,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3087 to 3023. [2022-01-10 07:45:46,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3023 states, 2943 states have (on average 1.7013251783893986) internal successors, (5007), 2947 states have internal predecessors, (5007), 45 states have call successors, (45), 33 states have call predecessors, (45), 33 states have return successors, (44), 43 states have call predecessors, (44), 43 states have call successors, (44) [2022-01-10 07:45:46,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3023 states to 3023 states and 5096 transitions. [2022-01-10 07:45:46,511 INFO L78 Accepts]: Start accepts. Automaton has 3023 states and 5096 transitions. Word has length 102 [2022-01-10 07:45:46,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:45:46,511 INFO L470 AbstractCegarLoop]: Abstraction has 3023 states and 5096 transitions. [2022-01-10 07:45:46,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:45:46,512 INFO L276 IsEmpty]: Start isEmpty. Operand 3023 states and 5096 transitions. [2022-01-10 07:45:46,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 07:45:46,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:45:46,513 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] [2022-01-10 07:45:46,525 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 07:45:46,722 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 07:45:46,723 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:45:46,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:45:46,723 INFO L85 PathProgramCache]: Analyzing trace with hash 303113590, now seen corresponding path program 1 times [2022-01-10 07:45:46,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:45:46,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379844057] [2022-01-10 07:45:46,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:45:46,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:45:46,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:45:46,725 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 07:45:46,727 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 07:45:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:45:46,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:45:46,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:45:46,961 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 07:45:46,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:45:46,961 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:45:46,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379844057] [2022-01-10 07:45:46,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379844057] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:45:46,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:45:46,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:45:46,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053602519] [2022-01-10 07:45:46,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:45:46,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:45:46,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:45:46,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:45:46,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:45:46,963 INFO L87 Difference]: Start difference. First operand 3023 states and 5096 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:45:47,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:45:47,116 INFO L93 Difference]: Finished difference Result 3925 states and 6256 transitions. [2022-01-10 07:45:47,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:45:47,123 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-01-10 07:45:47,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:45:47,130 INFO L225 Difference]: With dead ends: 3925 [2022-01-10 07:45:47,130 INFO L226 Difference]: Without dead ends: 3037 [2022-01-10 07:45:47,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 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 07:45:47,133 INFO L933 BasicCegarLoop]: 4247 mSDtfsCounter, 10 mSDsluCounter, 12740 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 16987 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 07:45:47,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 16987 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:45:47,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3037 states. [2022-01-10 07:45:47,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3037 to 3029. [2022-01-10 07:45:47,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 2949 states have (on average 1.6965072906069854) internal successors, (5003), 2953 states have internal predecessors, (5003), 45 states have call successors, (45), 33 states have call predecessors, (45), 33 states have return successors, (44), 43 states have call predecessors, (44), 43 states have call successors, (44) [2022-01-10 07:45:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 5092 transitions. [2022-01-10 07:45:47,213 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 5092 transitions. Word has length 102 [2022-01-10 07:45:47,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:45:47,214 INFO L470 AbstractCegarLoop]: Abstraction has 3029 states and 5092 transitions. [2022-01-10 07:45:47,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:45:47,214 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 5092 transitions. [2022-01-10 07:45:47,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 07:45:47,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:45:47,215 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] [2022-01-10 07:45:47,224 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 07:45:47,425 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 07:45:47,425 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:45:47,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:45:47,426 INFO L85 PathProgramCache]: Analyzing trace with hash -91253196, now seen corresponding path program 1 times [2022-01-10 07:45:47,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:45:47,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [347022160] [2022-01-10 07:45:47,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:45:47,426 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:45:47,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:45:47,428 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 07:45:47,431 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 07:45:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:45:47,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 07:45:47,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:45:47,726 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 07:45:47,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:45:47,726 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:45:47,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [347022160] [2022-01-10 07:45:47,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [347022160] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:45:47,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:45:47,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:45:47,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964258674] [2022-01-10 07:45:47,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:45:47,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:45:47,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:45:47,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:45:47,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:45:47,728 INFO L87 Difference]: Start difference. First operand 3029 states and 5092 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:45:47,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:45:47,993 INFO L93 Difference]: Finished difference Result 3924 states and 6213 transitions. [2022-01-10 07:45:47,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:45:47,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-01-10 07:45:47,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:45:48,001 INFO L225 Difference]: With dead ends: 3924 [2022-01-10 07:45:48,001 INFO L226 Difference]: Without dead ends: 3029 [2022-01-10 07:45:48,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 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 07:45:48,004 INFO L933 BasicCegarLoop]: 4225 mSDtfsCounter, 4269 mSDsluCounter, 8221 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4281 SdHoareTripleChecker+Valid, 12446 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:45:48,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4281 Valid, 12446 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:45:48,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2022-01-10 07:45:48,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 3029. [2022-01-10 07:45:48,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 2949 states have (on average 1.6941336046117328) internal successors, (4996), 2953 states have internal predecessors, (4996), 45 states have call successors, (45), 33 states have call predecessors, (45), 33 states have return successors, (44), 43 states have call predecessors, (44), 43 states have call successors, (44) [2022-01-10 07:45:48,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 5085 transitions. [2022-01-10 07:45:48,089 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 5085 transitions. Word has length 102 [2022-01-10 07:45:48,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:45:48,089 INFO L470 AbstractCegarLoop]: Abstraction has 3029 states and 5085 transitions. [2022-01-10 07:45:48,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:45:48,089 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 5085 transitions. [2022-01-10 07:45:48,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 07:45:48,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:45:48,091 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] [2022-01-10 07:45:48,103 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 07:45:48,300 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 07:45:48,301 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:45:48,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:45:48,301 INFO L85 PathProgramCache]: Analyzing trace with hash -68620942, now seen corresponding path program 1 times [2022-01-10 07:45:48,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:45:48,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691645075] [2022-01-10 07:45:48,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:45:48,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:45:48,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:45:48,303 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 07:45:48,305 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 07:45:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:45:48,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 07:45:48,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:45:48,588 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 07:45:48,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:45:48,588 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:45:48,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691645075] [2022-01-10 07:45:48,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691645075] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:45:48,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:45:48,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:45:48,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76591081] [2022-01-10 07:45:48,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:45:48,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:45:48,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:45:48,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:45:48,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:45:48,590 INFO L87 Difference]: Start difference. First operand 3029 states and 5085 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:45:48,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:45:48,952 INFO L93 Difference]: Finished difference Result 4040 states and 6357 transitions. [2022-01-10 07:45:48,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:45:48,953 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-01-10 07:45:48,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:45:48,960 INFO L225 Difference]: With dead ends: 4040 [2022-01-10 07:45:48,960 INFO L226 Difference]: Without dead ends: 3145 [2022-01-10 07:45:48,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 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 07:45:48,963 INFO L933 BasicCegarLoop]: 4236 mSDtfsCounter, 4317 mSDsluCounter, 8216 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4329 SdHoareTripleChecker+Valid, 12452 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:45:48,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4329 Valid, 12452 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 07:45:48,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3145 states. [2022-01-10 07:45:49,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3145 to 3117. [2022-01-10 07:45:49,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3117 states, 3035 states have (on average 1.673476112026359) internal successors, (5079), 3039 states have internal predecessors, (5079), 45 states have call successors, (45), 35 states have call predecessors, (45), 35 states have return successors, (44), 43 states have call predecessors, (44), 43 states have call successors, (44) [2022-01-10 07:45:49,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 5168 transitions. [2022-01-10 07:45:49,047 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 5168 transitions. Word has length 102 [2022-01-10 07:45:49,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:45:49,048 INFO L470 AbstractCegarLoop]: Abstraction has 3117 states and 5168 transitions. [2022-01-10 07:45:49,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:45:49,048 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 5168 transitions. [2022-01-10 07:45:49,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 07:45:49,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:45:49,049 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] [2022-01-10 07:45:49,061 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 07:45:49,258 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 07:45:49,259 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:45:49,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:45:49,260 INFO L85 PathProgramCache]: Analyzing trace with hash 150233776, now seen corresponding path program 1 times [2022-01-10 07:45:49,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:45:49,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913926122] [2022-01-10 07:45:49,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:45:49,260 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:45:49,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:45:49,262 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 07:45:49,300 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 07:45:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:45:49,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:45:49,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:45:49,540 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 07:45:49,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:45:49,540 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:45:49,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913926122] [2022-01-10 07:45:49,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913926122] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:45:49,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:45:49,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 07:45:49,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864288321] [2022-01-10 07:45:49,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:45:49,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:45:49,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:45:49,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:45:49,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:45:49,542 INFO L87 Difference]: Start difference. First operand 3117 states and 5168 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 07:45:49,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:45:49,669 INFO L93 Difference]: Finished difference Result 5040 states and 7513 transitions. [2022-01-10 07:45:49,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:45:49,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 102 [2022-01-10 07:45:49,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:45:49,679 INFO L225 Difference]: With dead ends: 5040 [2022-01-10 07:45:49,679 INFO L226 Difference]: Without dead ends: 4058 [2022-01-10 07:45:49,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 100 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 07:45:49,683 INFO L933 BasicCegarLoop]: 4292 mSDtfsCounter, 4123 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4123 SdHoareTripleChecker+Valid, 4547 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 07:45:49,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4123 Valid, 4547 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:45:49,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4058 states. [2022-01-10 07:45:49,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4058 to 4056. [2022-01-10 07:45:49,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4056 states, 3900 states have (on average 1.5669230769230769) internal successors, (6111), 3907 states have internal predecessors, (6111), 84 states have call successors, (84), 69 states have call predecessors, (84), 70 states have return successors, (84), 80 states have call predecessors, (84), 82 states have call successors, (84) [2022-01-10 07:45:49,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4056 states to 4056 states and 6279 transitions. [2022-01-10 07:45:49,822 INFO L78 Accepts]: Start accepts. Automaton has 4056 states and 6279 transitions. Word has length 102 [2022-01-10 07:45:49,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:45:49,822 INFO L470 AbstractCegarLoop]: Abstraction has 4056 states and 6279 transitions. [2022-01-10 07:45:49,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 07:45:49,823 INFO L276 IsEmpty]: Start isEmpty. Operand 4056 states and 6279 transitions. [2022-01-10 07:45:49,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-10 07:45:49,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:45:49,825 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:45:49,837 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 07:45:50,034 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 07:45:50,035 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:45:50,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:45:50,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1301665386, now seen corresponding path program 1 times [2022-01-10 07:45:50,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:45:50,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723919071] [2022-01-10 07:45:50,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:45:50,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:45:50,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:45:50,037 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 07:45:50,039 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 07:45:50,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:45:50,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:45:50,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:45:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 07:45:50,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:45:50,413 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:45:50,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1723919071] [2022-01-10 07:45:50,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1723919071] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:45:50,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:45:50,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:45:50,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594894150] [2022-01-10 07:45:50,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:45:50,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:45:50,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:45:50,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:45:50,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:45:50,415 INFO L87 Difference]: Start difference. First operand 4056 states and 6279 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 07:45:50,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:45:50,873 INFO L93 Difference]: Finished difference Result 7782 states and 10747 transitions. [2022-01-10 07:45:50,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:45:50,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 165 [2022-01-10 07:45:50,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:45:50,887 INFO L225 Difference]: With dead ends: 7782 [2022-01-10 07:45:50,887 INFO L226 Difference]: Without dead ends: 5862 [2022-01-10 07:45:50,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 163 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 07:45:50,892 INFO L933 BasicCegarLoop]: 4360 mSDtfsCounter, 4299 mSDsluCounter, 4425 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4305 SdHoareTripleChecker+Valid, 8785 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:45:50,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4305 Valid, 8785 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:45:50,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5862 states. [2022-01-10 07:45:51,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5862 to 5858. [2022-01-10 07:45:51,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5858 states, 5559 states have (on average 1.455477603885591) internal successors, (8091), 5575 states have internal predecessors, (8091), 157 states have call successors, (157), 129 states have call predecessors, (157), 140 states have return successors, (179), 155 states have call predecessors, (179), 155 states have call successors, (179) [2022-01-10 07:45:51,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5858 states to 5858 states and 8427 transitions. [2022-01-10 07:45:51,129 INFO L78 Accepts]: Start accepts. Automaton has 5858 states and 8427 transitions. Word has length 165 [2022-01-10 07:45:51,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:45:51,129 INFO L470 AbstractCegarLoop]: Abstraction has 5858 states and 8427 transitions. [2022-01-10 07:45:51,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 07:45:51,129 INFO L276 IsEmpty]: Start isEmpty. Operand 5858 states and 8427 transitions. [2022-01-10 07:45:51,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-10 07:45:51,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:45:51,133 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:45:51,146 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 07:45:51,343 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 07:45:51,343 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:45:51,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:45:51,344 INFO L85 PathProgramCache]: Analyzing trace with hash -320710572, now seen corresponding path program 1 times [2022-01-10 07:45:51,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:45:51,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064280402] [2022-01-10 07:45:51,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:45:51,344 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:45:51,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:45:51,345 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 07:45:51,346 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 07:45:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:45:51,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:45:51,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:45:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 07:45:51,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:45:51,663 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:45:51,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1064280402] [2022-01-10 07:45:51,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1064280402] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:45:51,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:45:51,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:45:51,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443905983] [2022-01-10 07:45:51,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:45:51,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:45:51,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:45:51,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:45:51,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:45:51,664 INFO L87 Difference]: Start difference. First operand 5858 states and 8427 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 07:45:51,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:45:51,873 INFO L93 Difference]: Finished difference Result 9572 states and 12858 transitions. [2022-01-10 07:45:51,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:45:51,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 165 [2022-01-10 07:45:51,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:45:51,888 INFO L225 Difference]: With dead ends: 9572 [2022-01-10 07:45:51,888 INFO L226 Difference]: Without dead ends: 5850 [2022-01-10 07:45:51,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 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 07:45:51,896 INFO L933 BasicCegarLoop]: 4242 mSDtfsCounter, 277 mSDsluCounter, 3958 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 8200 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 07:45:51,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 8200 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:45:51,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5850 states. [2022-01-10 07:45:52,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5850 to 5850. [2022-01-10 07:45:52,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5850 states, 5554 states have (on average 1.455167446885128) internal successors, (8082), 5569 states have internal predecessors, (8082), 154 states have call successors, (154), 129 states have call predecessors, (154), 140 states have return successors, (176), 152 states have call predecessors, (176), 152 states have call successors, (176) [2022-01-10 07:45:52,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5850 states to 5850 states and 8412 transitions. [2022-01-10 07:45:52,144 INFO L78 Accepts]: Start accepts. Automaton has 5850 states and 8412 transitions. Word has length 165 [2022-01-10 07:45:52,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:45:52,144 INFO L470 AbstractCegarLoop]: Abstraction has 5850 states and 8412 transitions. [2022-01-10 07:45:52,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 07:45:52,144 INFO L276 IsEmpty]: Start isEmpty. Operand 5850 states and 8412 transitions. [2022-01-10 07:45:52,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-10 07:45:52,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:45:52,149 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:45:52,161 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 07:45:52,359 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 07:45:52,359 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:45:52,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:45:52,359 INFO L85 PathProgramCache]: Analyzing trace with hash 2057200209, now seen corresponding path program 1 times [2022-01-10 07:45:52,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:45:52,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549487502] [2022-01-10 07:45:52,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:45:52,360 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:45:52,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:45:52,361 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 07:45:52,363 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 07:45:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:45:52,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:45:52,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:45:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 07:45:52,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:45:52,729 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:45:52,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1549487502] [2022-01-10 07:45:52,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1549487502] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:45:52,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:45:52,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:45:52,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23374682] [2022-01-10 07:45:52,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:45:52,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:45:52,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:45:52,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:45:52,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:45:52,731 INFO L87 Difference]: Start difference. First operand 5850 states and 8412 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 07:45:53,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:45:53,272 INFO L93 Difference]: Finished difference Result 12905 states and 16842 transitions. [2022-01-10 07:45:53,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:45:53,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 166 [2022-01-10 07:45:53,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:45:53,293 INFO L225 Difference]: With dead ends: 12905 [2022-01-10 07:45:53,294 INFO L226 Difference]: Without dead ends: 9191 [2022-01-10 07:45:53,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 164 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 07:45:53,303 INFO L933 BasicCegarLoop]: 4343 mSDtfsCounter, 4294 mSDsluCounter, 4402 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4300 SdHoareTripleChecker+Valid, 8745 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:45:53,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4300 Valid, 8745 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:45:53,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9191 states. [2022-01-10 07:45:53,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9191 to 9187. [2022-01-10 07:45:53,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9187 states, 8624 states have (on average 1.361317254174397) internal successors, (11740), 8656 states have internal predecessors, (11740), 289 states have call successors, (289), 241 states have call predecessors, (289), 272 states have return successors, (355), 291 states have call predecessors, (355), 287 states have call successors, (355) [2022-01-10 07:45:53,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9187 states to 9187 states and 12384 transitions. [2022-01-10 07:45:53,724 INFO L78 Accepts]: Start accepts. Automaton has 9187 states and 12384 transitions. Word has length 166 [2022-01-10 07:45:53,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:45:53,725 INFO L470 AbstractCegarLoop]: Abstraction has 9187 states and 12384 transitions. [2022-01-10 07:45:53,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 07:45:53,725 INFO L276 IsEmpty]: Start isEmpty. Operand 9187 states and 12384 transitions. [2022-01-10 07:45:53,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-10 07:45:53,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:45:53,731 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:45:53,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-01-10 07:45:53,941 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 07:45:53,941 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:45:53,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:45:53,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1256812273, now seen corresponding path program 1 times [2022-01-10 07:45:53,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:45:53,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923903476] [2022-01-10 07:45:53,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:45:53,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:45:53,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:45:53,943 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 07:45:53,945 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 07:45:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:45:54,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:45:54,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:45:54,270 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 07:45:54,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:45:54,271 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:45:54,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923903476] [2022-01-10 07:45:54,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923903476] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:45:54,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:45:54,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:45:54,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80150276] [2022-01-10 07:45:54,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:45:54,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:45:54,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:45:54,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:45:54,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:45:54,272 INFO L87 Difference]: Start difference. First operand 9187 states and 12384 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 07:45:54,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:45:54,826 INFO L93 Difference]: Finished difference Result 16231 states and 20775 transitions. [2022-01-10 07:45:54,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:45:54,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 166 [2022-01-10 07:45:54,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:45:54,848 INFO L225 Difference]: With dead ends: 16231 [2022-01-10 07:45:54,848 INFO L226 Difference]: Without dead ends: 9180 [2022-01-10 07:45:54,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 164 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 07:45:54,864 INFO L933 BasicCegarLoop]: 4241 mSDtfsCounter, 275 mSDsluCounter, 3958 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 8199 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 07:45:54,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 8199 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:45:54,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9180 states. [2022-01-10 07:45:55,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9180 to 9180. [2022-01-10 07:45:55,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9180 states, 8620 states have (on average 1.3611368909512762) internal successors, (11733), 8651 states have internal predecessors, (11733), 286 states have call successors, (286), 241 states have call predecessors, (286), 272 states have return successors, (352), 288 states have call predecessors, (352), 284 states have call successors, (352) [2022-01-10 07:45:55,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9180 states to 9180 states and 12371 transitions. [2022-01-10 07:45:55,255 INFO L78 Accepts]: Start accepts. Automaton has 9180 states and 12371 transitions. Word has length 166 [2022-01-10 07:45:55,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:45:55,256 INFO L470 AbstractCegarLoop]: Abstraction has 9180 states and 12371 transitions. [2022-01-10 07:45:55,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 07:45:55,256 INFO L276 IsEmpty]: Start isEmpty. Operand 9180 states and 12371 transitions. [2022-01-10 07:45:55,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 07:45:55,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:45:55,262 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:45:55,272 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 07:45:55,471 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 07:45:55,472 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:45:55,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:45:55,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1377052666, now seen corresponding path program 1 times [2022-01-10 07:45:55,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:45:55,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1073942344] [2022-01-10 07:45:55,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:45:55,473 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:45:55,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:45:55,474 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 07:45:55,476 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 07:45:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:45:55,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:45:55,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:45:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 07:45:55,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:45:55,893 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:45:55,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1073942344] [2022-01-10 07:45:55,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1073942344] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:45:55,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:45:55,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:45:55,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027318884] [2022-01-10 07:45:55,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:45:55,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:45:55,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:45:55,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:45:55,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:45:55,894 INFO L87 Difference]: Start difference. First operand 9180 states and 12371 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 07:45:56,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:45:56,770 INFO L93 Difference]: Finished difference Result 22516 states and 28273 transitions. [2022-01-10 07:45:56,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:45:56,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 167 [2022-01-10 07:45:56,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:45:56,799 INFO L225 Difference]: With dead ends: 22516 [2022-01-10 07:45:56,799 INFO L226 Difference]: Without dead ends: 15472 [2022-01-10 07:45:56,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 165 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 07:45:56,818 INFO L933 BasicCegarLoop]: 4239 mSDtfsCounter, 4300 mSDsluCounter, 4303 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4306 SdHoareTripleChecker+Valid, 8542 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:45:56,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4306 Valid, 8542 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:45:56,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15472 states. [2022-01-10 07:45:57,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15472 to 15468. [2022-01-10 07:45:57,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15468 states, 14404 states have (on average 1.2924881977228548) internal successors, (18617), 14471 states have internal predecessors, (18617), 534 states have call successors, (534), 449 states have call predecessors, (534), 528 states have return successors, (696), 548 states have call predecessors, (696), 532 states have call successors, (696) [2022-01-10 07:45:57,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15468 states to 15468 states and 19847 transitions. [2022-01-10 07:45:57,584 INFO L78 Accepts]: Start accepts. Automaton has 15468 states and 19847 transitions. Word has length 167 [2022-01-10 07:45:57,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:45:57,585 INFO L470 AbstractCegarLoop]: Abstraction has 15468 states and 19847 transitions. [2022-01-10 07:45:57,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 07:45:57,585 INFO L276 IsEmpty]: Start isEmpty. Operand 15468 states and 19847 transitions. [2022-01-10 07:45:57,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-10 07:45:57,594 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:45:57,594 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:45:57,605 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 07:45:57,805 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 07:45:57,805 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:45:57,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:45:57,806 INFO L85 PathProgramCache]: Analyzing trace with hash 880361453, now seen corresponding path program 1 times [2022-01-10 07:45:57,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:45:57,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916894351] [2022-01-10 07:45:57,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:45:57,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:45:57,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:45:57,808 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 07:45:57,810 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 07:45:57,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:45:57,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:45:57,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:45:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 07:45:58,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:45:58,225 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:45:58,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916894351] [2022-01-10 07:45:58,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916894351] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:45:58,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:45:58,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:45:58,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429858955] [2022-01-10 07:45:58,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:45:58,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:45:58,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:45:58,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:45:58,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:45:58,227 INFO L87 Difference]: Start difference. First operand 15468 states and 19847 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 07:45:59,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:45:59,735 INFO L93 Difference]: Finished difference Result 42677 states and 52071 transitions. [2022-01-10 07:45:59,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:45:59,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 168 [2022-01-10 07:45:59,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:45:59,809 INFO L225 Difference]: With dead ends: 42677 [2022-01-10 07:45:59,809 INFO L226 Difference]: Without dead ends: 29345 [2022-01-10 07:45:59,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 166 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 07:45:59,827 INFO L933 BasicCegarLoop]: 4332 mSDtfsCounter, 4291 mSDsluCounter, 4361 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4297 SdHoareTripleChecker+Valid, 8693 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:45:59,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4297 Valid, 8693 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:45:59,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29345 states. [2022-01-10 07:46:01,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29345 to 28797. [2022-01-10 07:46:01,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28797 states, 26482 states have (on average 1.239936560682728) internal successors, (32836), 26790 states have internal predecessors, (32836), 1001 states have call successors, (1001), 833 states have call predecessors, (1001), 1312 states have return successors, (1676), 1175 states have call predecessors, (1676), 999 states have call successors, (1676) [2022-01-10 07:46:01,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28797 states to 28797 states and 35513 transitions. [2022-01-10 07:46:01,255 INFO L78 Accepts]: Start accepts. Automaton has 28797 states and 35513 transitions. Word has length 168 [2022-01-10 07:46:01,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:46:01,255 INFO L470 AbstractCegarLoop]: Abstraction has 28797 states and 35513 transitions. [2022-01-10 07:46:01,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 07:46:01,255 INFO L276 IsEmpty]: Start isEmpty. Operand 28797 states and 35513 transitions. [2022-01-10 07:46:01,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-10 07:46:01,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:46:01,271 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:01,281 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 07:46:01,481 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 07:46:01,481 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:46:01,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:46:01,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1861316267, now seen corresponding path program 1 times [2022-01-10 07:46:01,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:46:01,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011430847] [2022-01-10 07:46:01,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:46:01,483 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:46:01,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:46:01,485 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 07:46:01,486 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 07:46:01,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:46:01,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:46:01,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:46:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 07:46:01,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:46:01,799 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:46:01,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011430847] [2022-01-10 07:46:01,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011430847] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:46:01,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:46:01,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:46:01,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553898660] [2022-01-10 07:46:01,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:46:01,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:46:01,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:46:01,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:46:01,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:46:01,800 INFO L87 Difference]: Start difference. First operand 28797 states and 35513 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 07:46:03,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:46:03,206 INFO L93 Difference]: Finished difference Result 55454 states and 67038 transitions. [2022-01-10 07:46:03,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:46:03,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 168 [2022-01-10 07:46:03,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:46:03,282 INFO L225 Difference]: With dead ends: 55454 [2022-01-10 07:46:03,283 INFO L226 Difference]: Without dead ends: 28792 [2022-01-10 07:46:03,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:46:03,318 INFO L933 BasicCegarLoop]: 4240 mSDtfsCounter, 272 mSDsluCounter, 3958 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 8198 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 07:46:03,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 8198 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:46:03,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28792 states. [2022-01-10 07:46:04,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28792 to 28792. [2022-01-10 07:46:04,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28792 states, 26480 states have (on average 1.2398791540785499) internal successors, (32832), 26787 states have internal predecessors, (32832), 998 states have call successors, (998), 833 states have call predecessors, (998), 1312 states have return successors, (1672), 1172 states have call predecessors, (1672), 996 states have call successors, (1672) [2022-01-10 07:46:04,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28792 states to 28792 states and 35502 transitions. [2022-01-10 07:46:04,757 INFO L78 Accepts]: Start accepts. Automaton has 28792 states and 35502 transitions. Word has length 168 [2022-01-10 07:46:04,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:46:04,757 INFO L470 AbstractCegarLoop]: Abstraction has 28792 states and 35502 transitions. [2022-01-10 07:46:04,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 07:46:04,757 INFO L276 IsEmpty]: Start isEmpty. Operand 28792 states and 35502 transitions. [2022-01-10 07:46:04,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-10 07:46:04,770 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:46:04,770 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:04,783 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 07:46:04,980 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 07:46:04,981 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:46:04,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:46:04,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1387265630, now seen corresponding path program 1 times [2022-01-10 07:46:04,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:46:04,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1692446178] [2022-01-10 07:46:04,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:46:04,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:46:04,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:46:04,983 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 07:46:04,984 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 07:46:05,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:46:05,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:46:05,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:46:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 07:46:05,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:46:05,385 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:46:05,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1692446178] [2022-01-10 07:46:05,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1692446178] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:46:05,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:46:05,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:46:05,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185473698] [2022-01-10 07:46:05,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:46:05,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:46:05,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:46:05,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:46:05,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:46:05,386 INFO L87 Difference]: Start difference. First operand 28792 states and 35502 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 07:46:08,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:46:08,252 INFO L93 Difference]: Finished difference Result 78236 states and 94003 transitions. [2022-01-10 07:46:08,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:46:08,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 169 [2022-01-10 07:46:08,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:46:08,353 INFO L225 Difference]: With dead ends: 78236 [2022-01-10 07:46:08,353 INFO L226 Difference]: Without dead ends: 51580 [2022-01-10 07:46:08,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 167 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 07:46:08,387 INFO L933 BasicCegarLoop]: 4305 mSDtfsCounter, 4273 mSDsluCounter, 4334 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4279 SdHoareTripleChecker+Valid, 8639 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:46:08,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4279 Valid, 8639 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:46:08,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51580 states. [2022-01-10 07:46:10,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51580 to 51576. [2022-01-10 07:46:10,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51576 states, 47213 states have (on average 1.2137546862093067) internal successors, (57305), 47825 states have internal predecessors, (57305), 1865 states have call successors, (1865), 1537 states have call predecessors, (1865), 2496 states have return successors, (3227), 2215 states have call predecessors, (3227), 1863 states have call successors, (3227) [2022-01-10 07:46:11,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51576 states to 51576 states and 62397 transitions. [2022-01-10 07:46:11,123 INFO L78 Accepts]: Start accepts. Automaton has 51576 states and 62397 transitions. Word has length 169 [2022-01-10 07:46:11,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:46:11,123 INFO L470 AbstractCegarLoop]: Abstraction has 51576 states and 62397 transitions. [2022-01-10 07:46:11,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 07:46:11,124 INFO L276 IsEmpty]: Start isEmpty. Operand 51576 states and 62397 transitions. [2022-01-10 07:46:11,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-10 07:46:11,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:46:11,146 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:11,158 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 07:46:11,356 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 07:46:11,356 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:46:11,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:46:11,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1926746852, now seen corresponding path program 1 times [2022-01-10 07:46:11,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:46:11,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1472039075] [2022-01-10 07:46:11,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:46:11,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:46:11,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:46:11,358 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 07:46:11,359 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 07:46:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:46:11,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:46:11,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:46:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 07:46:11,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:46:11,669 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:46:11,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1472039075] [2022-01-10 07:46:11,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1472039075] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:46:11,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:46:11,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:46:11,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236045934] [2022-01-10 07:46:11,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:46:11,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:46:11,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:46:11,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:46:11,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:46:11,671 INFO L87 Difference]: Start difference. First operand 51576 states and 62397 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)