/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.09.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 08:23:49,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 08:23:49,031 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 08:23:49,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 08:23:49,088 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 08:23:49,093 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 08:23:49,094 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 08:23:49,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 08:23:49,096 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 08:23:49,097 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 08:23:49,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 08:23:49,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 08:23:49,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 08:23:49,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 08:23:49,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 08:23:49,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 08:23:49,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 08:23:49,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 08:23:49,103 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 08:23:49,104 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 08:23:49,105 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 08:23:49,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 08:23:49,108 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 08:23:49,109 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 08:23:49,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 08:23:49,117 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 08:23:49,117 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 08:23:49,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 08:23:49,118 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 08:23:49,119 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 08:23:49,119 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 08:23:49,120 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 08:23:49,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 08:23:49,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 08:23:49,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 08:23:49,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 08:23:49,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 08:23:49,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 08:23:49,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 08:23:49,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 08:23:49,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 08:23:49,124 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 08:23:49,146 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 08:23:49,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 08:23:49,147 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 08:23:49,147 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 08:23:49,147 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 08:23:49,148 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 08:23:49,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 08:23:49,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 08:23:49,148 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 08:23:49,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 08:23:49,148 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 08:23:49,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 08:23:49,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 08:23:49,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 08:23:49,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 08:23:49,149 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 08:23:49,149 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 08:23:49,149 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 08:23:49,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 08:23:49,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 08:23:49,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 08:23:49,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 08:23:49,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 08:23:49,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:23:49,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 08:23:49,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 08:23:49,150 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 08:23:49,150 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 08:23:49,151 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 08:23:49,151 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 08:23:49,151 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 08:23:49,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 08:23:49,151 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 08:23:49,151 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 08:23:49,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 08:23:49,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 08:23:49,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 08:23:49,326 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 08:23:49,331 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 08:23:49,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.09.cil-1.c [2022-01-10 08:23:49,393 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42edd9cd5/b34eb86c1da84d9f9c68decf28afe5b0/FLAG8f877d5d3 [2022-01-10 08:23:49,764 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 08:23:49,765 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.09.cil-1.c [2022-01-10 08:23:49,774 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42edd9cd5/b34eb86c1da84d9f9c68decf28afe5b0/FLAG8f877d5d3 [2022-01-10 08:23:49,784 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42edd9cd5/b34eb86c1da84d9f9c68decf28afe5b0 [2022-01-10 08:23:49,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 08:23:49,786 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 08:23:49,787 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 08:23:49,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 08:23:49,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 08:23:49,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:23:49" (1/1) ... [2022-01-10 08:23:49,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@587377ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:49, skipping insertion in model container [2022-01-10 08:23:49,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:23:49" (1/1) ... [2022-01-10 08:23:49,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 08:23:49,857 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 08:23:49,975 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.09.cil-1.c[911,924] [2022-01-10 08:23:50,021 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.09.cil-1.c[8416,8429] [2022-01-10 08:23:50,073 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:23:50,086 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 08:23:50,105 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.09.cil-1.c[911,924] [2022-01-10 08:23:50,120 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.09.cil-1.c[8416,8429] [2022-01-10 08:23:50,157 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:23:50,182 INFO L208 MainTranslator]: Completed translation [2022-01-10 08:23:50,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:50 WrapperNode [2022-01-10 08:23:50,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 08:23:50,184 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 08:23:50,184 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 08:23:50,184 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 08:23:50,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:50" (1/1) ... [2022-01-10 08:23:50,203 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:50" (1/1) ... [2022-01-10 08:23:50,233 INFO L137 Inliner]: procedures = 74, calls = 88, calls flagged for inlining = 42, calls inlined = 42, statements flattened = 870 [2022-01-10 08:23:50,233 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 08:23:50,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 08:23:50,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 08:23:50,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 08:23:50,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:50" (1/1) ... [2022-01-10 08:23:50,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:50" (1/1) ... [2022-01-10 08:23:50,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:50" (1/1) ... [2022-01-10 08:23:50,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:50" (1/1) ... [2022-01-10 08:23:50,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:50" (1/1) ... [2022-01-10 08:23:50,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:50" (1/1) ... [2022-01-10 08:23:50,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:50" (1/1) ... [2022-01-10 08:23:50,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 08:23:50,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 08:23:50,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 08:23:50,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 08:23:50,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:50" (1/1) ... [2022-01-10 08:23:50,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:23:50,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:23:50,313 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 08:23:50,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 08:23:50,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 08:23:50,337 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-01-10 08:23:50,337 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-01-10 08:23:50,337 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-01-10 08:23:50,337 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-01-10 08:23:50,337 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-01-10 08:23:50,337 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-01-10 08:23:50,337 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-01-10 08:23:50,337 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-01-10 08:23:50,337 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-01-10 08:23:50,338 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-01-10 08:23:50,338 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-01-10 08:23:50,338 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-01-10 08:23:50,338 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-01-10 08:23:50,338 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-01-10 08:23:50,338 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-01-10 08:23:50,338 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-01-10 08:23:50,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 08:23:50,338 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-01-10 08:23:50,338 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-01-10 08:23:50,338 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-01-10 08:23:50,338 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-01-10 08:23:50,338 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-01-10 08:23:50,339 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-01-10 08:23:50,339 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-01-10 08:23:50,339 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-01-10 08:23:50,339 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-01-10 08:23:50,339 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-01-10 08:23:50,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 08:23:50,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 08:23:50,339 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-01-10 08:23:50,339 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-01-10 08:23:50,438 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 08:23:50,439 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 08:23:50,986 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1bv32 == ~q_free~0); [2022-01-10 08:23:50,986 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1bv32 == ~q_free~0;~c_dr_st~0 := 2bv32;~c_dr_pc~0 := 2bv32;~a_t~0 := do_read_c_~a~0#1; [2022-01-10 08:23:51,034 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 08:23:51,049 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 08:23:51,050 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2022-01-10 08:23:51,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:23:51 BoogieIcfgContainer [2022-01-10 08:23:51,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 08:23:51,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 08:23:51,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 08:23:51,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 08:23:51,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:23:49" (1/3) ... [2022-01-10 08:23:51,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@615f5ea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:23:51, skipping insertion in model container [2022-01-10 08:23:51,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:50" (2/3) ... [2022-01-10 08:23:51,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@615f5ea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:23:51, skipping insertion in model container [2022-01-10 08:23:51,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:23:51" (3/3) ... [2022-01-10 08:23:51,058 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.09.cil-1.c [2022-01-10 08:23:51,061 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 08:23:51,062 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 08:23:51,106 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 08:23:51,113 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 08:23:51,113 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 08:23:51,136 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 368 states have (on average 1.625) internal successors, (598), 374 states have internal predecessors, (598), 39 states have call successors, (39), 14 states have call predecessors, (39), 14 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2022-01-10 08:23:51,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:23:51,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:51,143 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] [2022-01-10 08:23:51,143 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:51,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:51,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1177923463, now seen corresponding path program 1 times [2022-01-10 08:23:51,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:51,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304152309] [2022-01-10 08:23:51,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:51,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:51,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:51,177 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:51,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 08:23:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:51,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:51,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:51,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:51,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:51,418 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:51,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304152309] [2022-01-10 08:23:51,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304152309] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:51,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:51,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:51,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926444043] [2022-01-10 08:23:51,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:51,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:51,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:51,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:51,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:51,454 INFO L87 Difference]: Start difference. First operand has 424 states, 368 states have (on average 1.625) internal successors, (598), 374 states have internal predecessors, (598), 39 states have call successors, (39), 14 states have call predecessors, (39), 14 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:51,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:51,570 INFO L93 Difference]: Finished difference Result 824 states and 1311 transitions. [2022-01-10 08:23:51,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:51,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-01-10 08:23:51,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:51,587 INFO L225 Difference]: With dead ends: 824 [2022-01-10 08:23:51,588 INFO L226 Difference]: Without dead ends: 414 [2022-01-10 08:23:51,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:51,595 INFO L933 BasicCegarLoop]: 636 mSDtfsCounter, 154 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:51,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 1113 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:51,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-01-10 08:23:51,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 414. [2022-01-10 08:23:51,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 360 states have (on average 1.5361111111111112) internal successors, (553), 364 states have internal predecessors, (553), 39 states have call successors, (39), 14 states have call predecessors, (39), 13 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-01-10 08:23:51,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 629 transitions. [2022-01-10 08:23:51,683 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 629 transitions. Word has length 65 [2022-01-10 08:23:51,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:51,686 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 629 transitions. [2022-01-10 08:23:51,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:51,687 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 629 transitions. [2022-01-10 08:23:51,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:23:51,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:51,689 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:23:51,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:51,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:51,892 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:51,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:51,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1137248713, now seen corresponding path program 1 times [2022-01-10 08:23:51,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:51,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533512842] [2022-01-10 08:23:51,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:51,894 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:51,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:51,895 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:51,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 08:23:51,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:51,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 08:23:52,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:52,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:52,136 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:52,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533512842] [2022-01-10 08:23:52,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533512842] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:52,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:52,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:23:52,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304224408] [2022-01-10 08:23:52,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:52,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:52,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:52,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:52,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:52,139 INFO L87 Difference]: Start difference. First operand 414 states and 629 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:52,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:52,753 INFO L93 Difference]: Finished difference Result 637 states and 950 transitions. [2022-01-10 08:23:52,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:23:52,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-01-10 08:23:52,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:52,758 INFO L225 Difference]: With dead ends: 637 [2022-01-10 08:23:52,759 INFO L226 Difference]: Without dead ends: 533 [2022-01-10 08:23:52,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:23:52,760 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 451 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 1643 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:52,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 1643 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 08:23:52,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-01-10 08:23:52,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 526. [2022-01-10 08:23:52,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 450 states have (on average 1.508888888888889) internal successors, (679), 456 states have internal predecessors, (679), 52 states have call successors, (52), 21 states have call predecessors, (52), 22 states have return successors, (55), 51 states have call predecessors, (55), 50 states have call successors, (55) [2022-01-10 08:23:52,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 786 transitions. [2022-01-10 08:23:52,801 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 786 transitions. Word has length 65 [2022-01-10 08:23:52,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:52,802 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 786 transitions. [2022-01-10 08:23:52,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:52,802 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 786 transitions. [2022-01-10 08:23:52,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:23:52,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:52,807 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:23:52,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:53,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:53,014 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:53,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:53,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1619378553, now seen corresponding path program 1 times [2022-01-10 08:23:53,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:53,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053253255] [2022-01-10 08:23:53,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:53,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:53,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:53,016 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:53,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 08:23:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:53,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:23:53,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:53,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:53,185 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:53,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053253255] [2022-01-10 08:23:53,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053253255] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:53,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:53,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:23:53,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171820693] [2022-01-10 08:23:53,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:53,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:53,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:53,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:53,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:53,186 INFO L87 Difference]: Start difference. First operand 526 states and 786 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:53,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:53,749 INFO L93 Difference]: Finished difference Result 982 states and 1444 transitions. [2022-01-10 08:23:53,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:23:53,749 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-01-10 08:23:53,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:53,753 INFO L225 Difference]: With dead ends: 982 [2022-01-10 08:23:53,753 INFO L226 Difference]: Without dead ends: 771 [2022-01-10 08:23:53,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:23:53,755 INFO L933 BasicCegarLoop]: 631 mSDtfsCounter, 443 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:53,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 1582 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 08:23:53,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-01-10 08:23:53,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 763. [2022-01-10 08:23:53,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 639 states have (on average 1.4663536776212833) internal successors, (937), 653 states have internal predecessors, (937), 78 states have call successors, (78), 35 states have call predecessors, (78), 44 states have return successors, (101), 79 states have call predecessors, (101), 76 states have call successors, (101) [2022-01-10 08:23:53,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1116 transitions. [2022-01-10 08:23:53,813 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1116 transitions. Word has length 65 [2022-01-10 08:23:53,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:53,813 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 1116 transitions. [2022-01-10 08:23:53,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:53,813 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1116 transitions. [2022-01-10 08:23:53,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:23:53,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:53,816 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:23:53,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:54,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:54,023 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:54,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:54,024 INFO L85 PathProgramCache]: Analyzing trace with hash 512989127, now seen corresponding path program 1 times [2022-01-10 08:23:54,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:54,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2116245792] [2022-01-10 08:23:54,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:54,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:54,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:54,026 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:54,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 08:23:54,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:54,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:54,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:54,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:54,227 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:54,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2116245792] [2022-01-10 08:23:54,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2116245792] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:54,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:54,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:54,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804098906] [2022-01-10 08:23:54,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:54,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:54,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:54,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:54,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:54,230 INFO L87 Difference]: Start difference. First operand 763 states and 1116 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:54,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:54,293 INFO L93 Difference]: Finished difference Result 1599 states and 2273 transitions. [2022-01-10 08:23:54,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:54,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-01-10 08:23:54,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:54,298 INFO L225 Difference]: With dead ends: 1599 [2022-01-10 08:23:54,299 INFO L226 Difference]: Without dead ends: 1165 [2022-01-10 08:23:54,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:54,301 INFO L933 BasicCegarLoop]: 660 mSDtfsCounter, 593 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:54,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 789 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:54,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-01-10 08:23:54,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1153. [2022-01-10 08:23:54,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 951 states have (on average 1.4279705573080967) internal successors, (1358), 975 states have internal predecessors, (1358), 118 states have call successors, (118), 63 states have call predecessors, (118), 82 states have return successors, (158), 119 states have call predecessors, (158), 116 states have call successors, (158) [2022-01-10 08:23:54,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1634 transitions. [2022-01-10 08:23:54,355 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1634 transitions. Word has length 65 [2022-01-10 08:23:54,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:54,355 INFO L470 AbstractCegarLoop]: Abstraction has 1153 states and 1634 transitions. [2022-01-10 08:23:54,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:54,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1634 transitions. [2022-01-10 08:23:54,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 08:23:54,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:54,356 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:23:54,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:54,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:54,563 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:54,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:54,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1995101688, now seen corresponding path program 1 times [2022-01-10 08:23:54,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:54,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221484585] [2022-01-10 08:23:54,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:54,564 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:54,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:54,565 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:54,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 08:23:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:54,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:23:54,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:54,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:54,737 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:54,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221484585] [2022-01-10 08:23:54,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221484585] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:54,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:54,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 08:23:54,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366541846] [2022-01-10 08:23:54,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:54,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:23:54,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:54,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:23:54,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:23:54,739 INFO L87 Difference]: Start difference. First operand 1153 states and 1634 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:54,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:54,783 INFO L93 Difference]: Finished difference Result 2017 states and 2828 transitions. [2022-01-10 08:23:54,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:23:54,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-01-10 08:23:54,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:54,787 INFO L225 Difference]: With dead ends: 2017 [2022-01-10 08:23:54,787 INFO L226 Difference]: Without dead ends: 1193 [2022-01-10 08:23:54,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:23:54,789 INFO L933 BasicCegarLoop]: 628 mSDtfsCounter, 7 mSDsluCounter, 2505 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 3133 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:54,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 3133 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:54,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2022-01-10 08:23:54,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1173. [2022-01-10 08:23:54,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 967 states have (on average 1.4167528438469492) internal successors, (1370), 991 states have internal predecessors, (1370), 118 states have call successors, (118), 63 states have call predecessors, (118), 86 states have return successors, (162), 123 states have call predecessors, (162), 116 states have call successors, (162) [2022-01-10 08:23:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1650 transitions. [2022-01-10 08:23:54,821 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1650 transitions. Word has length 66 [2022-01-10 08:23:54,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:54,821 INFO L470 AbstractCegarLoop]: Abstraction has 1173 states and 1650 transitions. [2022-01-10 08:23:54,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:54,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1650 transitions. [2022-01-10 08:23:54,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 08:23:54,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:54,822 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:23:54,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:55,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:55,031 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:55,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:55,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1270506310, now seen corresponding path program 1 times [2022-01-10 08:23:55,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:55,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929843129] [2022-01-10 08:23:55,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:55,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:55,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:55,034 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:55,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 08:23:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:55,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:55,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:55,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:55,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:55,193 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:55,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929843129] [2022-01-10 08:23:55,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929843129] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:55,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:55,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:55,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285471942] [2022-01-10 08:23:55,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:55,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:55,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:55,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:55,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:55,195 INFO L87 Difference]: Start difference. First operand 1173 states and 1650 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:55,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:55,264 INFO L93 Difference]: Finished difference Result 2789 states and 3830 transitions. [2022-01-10 08:23:55,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:55,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-01-10 08:23:55,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:55,271 INFO L225 Difference]: With dead ends: 2789 [2022-01-10 08:23:55,271 INFO L226 Difference]: Without dead ends: 1945 [2022-01-10 08:23:55,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:55,273 INFO L933 BasicCegarLoop]: 636 mSDtfsCounter, 579 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:55,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 768 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:55,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2022-01-10 08:23:55,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1929. [2022-01-10 08:23:55,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1563 states have (on average 1.3755598208573256) internal successors, (2150), 1607 states have internal predecessors, (2150), 198 states have call successors, (198), 119 states have call predecessors, (198), 166 states have return successors, (280), 207 states have call predecessors, (280), 196 states have call successors, (280) [2022-01-10 08:23:55,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 2628 transitions. [2022-01-10 08:23:55,323 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 2628 transitions. Word has length 66 [2022-01-10 08:23:55,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:55,324 INFO L470 AbstractCegarLoop]: Abstraction has 1929 states and 2628 transitions. [2022-01-10 08:23:55,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:55,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 2628 transitions. [2022-01-10 08:23:55,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 08:23:55,326 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:55,326 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:23:55,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:55,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:55,533 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:55,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:55,533 INFO L85 PathProgramCache]: Analyzing trace with hash 550313543, now seen corresponding path program 1 times [2022-01-10 08:23:55,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:55,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387526829] [2022-01-10 08:23:55,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:55,534 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:55,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:55,535 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:55,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 08:23:55,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:55,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:23:55,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 08:23:55,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:55,704 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:55,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387526829] [2022-01-10 08:23:55,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387526829] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:55,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:55,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 08:23:55,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235242884] [2022-01-10 08:23:55,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:55,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:23:55,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:55,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:23:55,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:23:55,706 INFO L87 Difference]: Start difference. First operand 1929 states and 2628 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:55,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:55,763 INFO L93 Difference]: Finished difference Result 3585 states and 4848 transitions. [2022-01-10 08:23:55,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:23:55,763 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 83 [2022-01-10 08:23:55,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:55,770 INFO L225 Difference]: With dead ends: 3585 [2022-01-10 08:23:55,770 INFO L226 Difference]: Without dead ends: 1985 [2022-01-10 08:23:55,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:23:55,774 INFO L933 BasicCegarLoop]: 626 mSDtfsCounter, 4 mSDsluCounter, 2498 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3124 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:55,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 3124 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:55,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2022-01-10 08:23:55,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1969. [2022-01-10 08:23:55,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1595 states have (on average 1.3630094043887147) internal successors, (2174), 1639 states have internal predecessors, (2174), 198 states have call successors, (198), 119 states have call predecessors, (198), 174 states have return successors, (288), 215 states have call predecessors, (288), 196 states have call successors, (288) [2022-01-10 08:23:55,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 2660 transitions. [2022-01-10 08:23:55,821 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 2660 transitions. Word has length 83 [2022-01-10 08:23:55,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:55,822 INFO L470 AbstractCegarLoop]: Abstraction has 1969 states and 2660 transitions. [2022-01-10 08:23:55,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:55,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 2660 transitions. [2022-01-10 08:23:55,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 08:23:55,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:55,824 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:23:55,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:56,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:56,031 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:56,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:56,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1443799881, now seen corresponding path program 1 times [2022-01-10 08:23:56,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:56,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602557013] [2022-01-10 08:23:56,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:56,035 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:56,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:56,037 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:56,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 08:23:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:56,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:56,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:56,247 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 08:23:56,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:56,248 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:56,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602557013] [2022-01-10 08:23:56,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602557013] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:56,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:56,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:56,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471757794] [2022-01-10 08:23:56,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:56,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:23:56,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:56,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:23:56,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:23:56,249 INFO L87 Difference]: Start difference. First operand 1969 states and 2660 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:23:56,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:56,509 INFO L93 Difference]: Finished difference Result 4441 states and 5948 transitions. [2022-01-10 08:23:56,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:23:56,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 83 [2022-01-10 08:23:56,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:56,519 INFO L225 Difference]: With dead ends: 4441 [2022-01-10 08:23:56,519 INFO L226 Difference]: Without dead ends: 2805 [2022-01-10 08:23:56,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:56,523 INFO L933 BasicCegarLoop]: 599 mSDtfsCounter, 865 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:56,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 953 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:23:56,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2022-01-10 08:23:56,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2801. [2022-01-10 08:23:56,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2801 states, 2243 states have (on average 1.3294694605439143) internal successors, (2982), 2311 states have internal predecessors, (2982), 286 states have call successors, (286), 175 states have call predecessors, (286), 270 states have return successors, (466), 319 states have call predecessors, (466), 284 states have call successors, (466) [2022-01-10 08:23:56,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2801 states to 2801 states and 3734 transitions. [2022-01-10 08:23:56,586 INFO L78 Accepts]: Start accepts. Automaton has 2801 states and 3734 transitions. Word has length 83 [2022-01-10 08:23:56,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:56,587 INFO L470 AbstractCegarLoop]: Abstraction has 2801 states and 3734 transitions. [2022-01-10 08:23:56,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:23:56,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2801 states and 3734 transitions. [2022-01-10 08:23:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-10 08:23:56,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:56,589 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:23:56,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:56,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:56,797 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:56,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:56,797 INFO L85 PathProgramCache]: Analyzing trace with hash 2006462429, now seen corresponding path program 1 times [2022-01-10 08:23:56,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:56,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200444844] [2022-01-10 08:23:56,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:56,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:56,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:56,799 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:56,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 08:23:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:56,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:56,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:56,969 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:56,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:56,969 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:56,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200444844] [2022-01-10 08:23:56,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200444844] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:56,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:56,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:56,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474268738] [2022-01-10 08:23:56,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:56,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:56,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:56,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:56,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:56,971 INFO L87 Difference]: Start difference. First operand 2801 states and 3734 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 08:23:57,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:57,101 INFO L93 Difference]: Finished difference Result 7605 states and 10014 transitions. [2022-01-10 08:23:57,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:57,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 85 [2022-01-10 08:23:57,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:57,119 INFO L225 Difference]: With dead ends: 7605 [2022-01-10 08:23:57,120 INFO L226 Difference]: Without dead ends: 4007 [2022-01-10 08:23:57,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:57,130 INFO L933 BasicCegarLoop]: 746 mSDtfsCounter, 116 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:57,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 1366 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:57,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2022-01-10 08:23:57,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 4007. [2022-01-10 08:23:57,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4007 states, 3187 states have (on average 1.3144022591779103) internal successors, (4189), 3285 states have internal predecessors, (4189), 410 states have call successors, (410), 259 states have call predecessors, (410), 408 states have return successors, (717), 467 states have call predecessors, (717), 408 states have call successors, (717) [2022-01-10 08:23:57,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4007 states to 4007 states and 5316 transitions. [2022-01-10 08:23:57,253 INFO L78 Accepts]: Start accepts. Automaton has 4007 states and 5316 transitions. Word has length 85 [2022-01-10 08:23:57,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:57,254 INFO L470 AbstractCegarLoop]: Abstraction has 4007 states and 5316 transitions. [2022-01-10 08:23:57,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 08:23:57,254 INFO L276 IsEmpty]: Start isEmpty. Operand 4007 states and 5316 transitions. [2022-01-10 08:23:57,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-10 08:23:57,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:57,264 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:23:57,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:57,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:57,475 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:57,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:57,476 INFO L85 PathProgramCache]: Analyzing trace with hash -516000905, now seen corresponding path program 1 times [2022-01-10 08:23:57,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:57,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599922888] [2022-01-10 08:23:57,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:57,476 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:57,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:57,478 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:57,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 08:23:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:57,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:23:57,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 08:23:57,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:57,785 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:57,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599922888] [2022-01-10 08:23:57,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599922888] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:57,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:57,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 08:23:57,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733911458] [2022-01-10 08:23:57,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:57,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:23:57,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:57,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:23:57,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:23:57,787 INFO L87 Difference]: Start difference. First operand 4007 states and 5316 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 08:23:57,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:57,879 INFO L93 Difference]: Finished difference Result 6963 states and 9232 transitions. [2022-01-10 08:23:57,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:23:57,879 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 155 [2022-01-10 08:23:57,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:57,889 INFO L225 Difference]: With dead ends: 6963 [2022-01-10 08:23:57,889 INFO L226 Difference]: Without dead ends: 3289 [2022-01-10 08:23:57,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-10 08:23:57,896 INFO L933 BasicCegarLoop]: 628 mSDtfsCounter, 37 mSDsluCounter, 2503 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3131 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:57,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 3131 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:57,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3289 states. [2022-01-10 08:23:57,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3289 to 2959. [2022-01-10 08:23:57,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2959 states, 2395 states have (on average 1.3106471816283924) internal successors, (3139), 2440 states have internal predecessors, (3139), 270 states have call successors, (270), 180 states have call predecessors, (270), 292 states have return successors, (494), 339 states have call predecessors, (494), 268 states have call successors, (494) [2022-01-10 08:23:57,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2959 states to 2959 states and 3903 transitions. [2022-01-10 08:23:57,969 INFO L78 Accepts]: Start accepts. Automaton has 2959 states and 3903 transitions. Word has length 155 [2022-01-10 08:23:57,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:57,969 INFO L470 AbstractCegarLoop]: Abstraction has 2959 states and 3903 transitions. [2022-01-10 08:23:57,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 08:23:57,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2959 states and 3903 transitions. [2022-01-10 08:23:57,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:23:57,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:57,976 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:23:57,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:58,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:58,183 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:58,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:58,184 INFO L85 PathProgramCache]: Analyzing trace with hash -971775259, now seen corresponding path program 1 times [2022-01-10 08:23:58,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:58,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690445535] [2022-01-10 08:23:58,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:58,184 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:58,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:58,185 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:58,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 08:23:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:58,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:58,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:58,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:58,450 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:58,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690445535] [2022-01-10 08:23:58,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690445535] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:58,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:58,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:58,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940840417] [2022-01-10 08:23:58,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:58,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:58,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:58,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:58,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:58,452 INFO L87 Difference]: Start difference. First operand 2959 states and 3903 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:58,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:58,519 INFO L93 Difference]: Finished difference Result 3248 states and 4353 transitions. [2022-01-10 08:23:58,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:58,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:23:58,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:58,533 INFO L225 Difference]: With dead ends: 3248 [2022-01-10 08:23:58,534 INFO L226 Difference]: Without dead ends: 2959 [2022-01-10 08:23:58,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:58,537 INFO L933 BasicCegarLoop]: 626 mSDtfsCounter, 457 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:58,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 782 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:58,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2959 states. [2022-01-10 08:23:58,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2959 to 2959. [2022-01-10 08:23:58,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2959 states, 2395 states have (on average 1.3102296450939457) internal successors, (3138), 2440 states have internal predecessors, (3138), 270 states have call successors, (270), 180 states have call predecessors, (270), 292 states have return successors, (494), 339 states have call predecessors, (494), 268 states have call successors, (494) [2022-01-10 08:23:58,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2959 states to 2959 states and 3902 transitions. [2022-01-10 08:23:58,645 INFO L78 Accepts]: Start accepts. Automaton has 2959 states and 3902 transitions. Word has length 145 [2022-01-10 08:23:58,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:58,646 INFO L470 AbstractCegarLoop]: Abstraction has 2959 states and 3902 transitions. [2022-01-10 08:23:58,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:58,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2959 states and 3902 transitions. [2022-01-10 08:23:58,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:23:58,655 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:58,655 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:23:58,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:58,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:58,868 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:58,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:58,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1646935385, now seen corresponding path program 1 times [2022-01-10 08:23:58,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:58,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [57375172] [2022-01-10 08:23:58,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:58,869 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:58,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:58,875 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:58,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 08:23:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:59,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:59,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:59,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:59,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:59,205 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:59,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [57375172] [2022-01-10 08:23:59,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [57375172] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:59,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:59,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:59,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547607160] [2022-01-10 08:23:59,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:59,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:59,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:59,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:59,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:59,207 INFO L87 Difference]: Start difference. First operand 2959 states and 3902 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:59,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:59,759 INFO L93 Difference]: Finished difference Result 3565 states and 4862 transitions. [2022-01-10 08:23:59,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:23:59,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:23:59,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:59,770 INFO L225 Difference]: With dead ends: 3565 [2022-01-10 08:23:59,770 INFO L226 Difference]: Without dead ends: 3280 [2022-01-10 08:23:59,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:23:59,773 INFO L933 BasicCegarLoop]: 651 mSDtfsCounter, 1091 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 1714 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:59,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1120 Valid, 1714 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 08:23:59,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2022-01-10 08:23:59,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 3257. [2022-01-10 08:23:59,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3257 states, 2668 states have (on average 1.338455772113943) internal successors, (3571), 2714 states have internal predecessors, (3571), 288 states have call successors, (288), 186 states have call predecessors, (288), 299 states have return successors, (513), 357 states have call predecessors, (513), 286 states have call successors, (513) [2022-01-10 08:23:59,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 4372 transitions. [2022-01-10 08:23:59,875 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 4372 transitions. Word has length 145 [2022-01-10 08:23:59,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:59,875 INFO L470 AbstractCegarLoop]: Abstraction has 3257 states and 4372 transitions. [2022-01-10 08:23:59,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:59,875 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 4372 transitions. [2022-01-10 08:23:59,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:23:59,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:59,881 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:23:59,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:00,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:00,090 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:00,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:00,090 INFO L85 PathProgramCache]: Analyzing trace with hash 96068139, now seen corresponding path program 1 times [2022-01-10 08:24:00,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:00,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731973871] [2022-01-10 08:24:00,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:00,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:00,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:00,100 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:00,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 08:24:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:00,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:00,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:00,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:00,373 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:00,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731973871] [2022-01-10 08:24:00,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731973871] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:00,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:00,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:00,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268611967] [2022-01-10 08:24:00,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:00,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:00,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:00,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:00,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:00,375 INFO L87 Difference]: Start difference. First operand 3257 states and 4372 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:00,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:00,724 INFO L93 Difference]: Finished difference Result 3840 states and 5292 transitions. [2022-01-10 08:24:00,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:24:00,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:00,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:00,741 INFO L225 Difference]: With dead ends: 3840 [2022-01-10 08:24:00,741 INFO L226 Difference]: Without dead ends: 3257 [2022-01-10 08:24:00,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:24:00,744 INFO L933 BasicCegarLoop]: 584 mSDtfsCounter, 830 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:00,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 1225 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:24:00,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2022-01-10 08:24:00,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 3257. [2022-01-10 08:24:00,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3257 states, 2668 states have (on average 1.3358320839580209) internal successors, (3564), 2714 states have internal predecessors, (3564), 288 states have call successors, (288), 186 states have call predecessors, (288), 299 states have return successors, (513), 357 states have call predecessors, (513), 286 states have call successors, (513) [2022-01-10 08:24:00,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 4365 transitions. [2022-01-10 08:24:00,856 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 4365 transitions. Word has length 145 [2022-01-10 08:24:00,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:00,857 INFO L470 AbstractCegarLoop]: Abstraction has 3257 states and 4365 transitions. [2022-01-10 08:24:00,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:00,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 4365 transitions. [2022-01-10 08:24:00,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:00,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:00,864 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:00,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:01,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:01,073 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:01,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:01,074 INFO L85 PathProgramCache]: Analyzing trace with hash 13746727, now seen corresponding path program 1 times [2022-01-10 08:24:01,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:01,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2104452176] [2022-01-10 08:24:01,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:01,075 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:01,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:01,076 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:01,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 08:24:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:01,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:01,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:01,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:01,390 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:01,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2104452176] [2022-01-10 08:24:01,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2104452176] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:01,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:01,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:01,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94348442] [2022-01-10 08:24:01,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:01,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:01,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:01,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:01,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:01,391 INFO L87 Difference]: Start difference. First operand 3257 states and 4365 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:01,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:01,757 INFO L93 Difference]: Finished difference Result 3840 states and 5278 transitions. [2022-01-10 08:24:01,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:24:01,757 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:01,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:01,767 INFO L225 Difference]: With dead ends: 3840 [2022-01-10 08:24:01,767 INFO L226 Difference]: Without dead ends: 3257 [2022-01-10 08:24:01,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:24:01,770 INFO L933 BasicCegarLoop]: 581 mSDtfsCounter, 824 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:01,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [853 Valid, 1218 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:24:01,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2022-01-10 08:24:01,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 3257. [2022-01-10 08:24:01,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3257 states, 2668 states have (on average 1.333208395802099) internal successors, (3557), 2714 states have internal predecessors, (3557), 288 states have call successors, (288), 186 states have call predecessors, (288), 299 states have return successors, (513), 357 states have call predecessors, (513), 286 states have call successors, (513) [2022-01-10 08:24:01,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 4358 transitions. [2022-01-10 08:24:01,879 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 4358 transitions. Word has length 145 [2022-01-10 08:24:01,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:01,880 INFO L470 AbstractCegarLoop]: Abstraction has 3257 states and 4358 transitions. [2022-01-10 08:24:01,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:01,880 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 4358 transitions. [2022-01-10 08:24:01,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:01,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:01,886 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:01,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:02,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:02,094 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:02,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:02,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1535111851, now seen corresponding path program 1 times [2022-01-10 08:24:02,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:02,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1680258376] [2022-01-10 08:24:02,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:02,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:02,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:02,096 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:02,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 08:24:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:02,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:02,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:02,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:02,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:02,377 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:02,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1680258376] [2022-01-10 08:24:02,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1680258376] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:02,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:02,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:02,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107581389] [2022-01-10 08:24:02,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:02,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:02,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:02,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:02,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:02,379 INFO L87 Difference]: Start difference. First operand 3257 states and 4358 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:02,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:02,762 INFO L93 Difference]: Finished difference Result 3840 states and 5264 transitions. [2022-01-10 08:24:02,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:24:02,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:02,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:02,777 INFO L225 Difference]: With dead ends: 3840 [2022-01-10 08:24:02,777 INFO L226 Difference]: Without dead ends: 3257 [2022-01-10 08:24:02,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:24:02,786 INFO L933 BasicCegarLoop]: 578 mSDtfsCounter, 818 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:02,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [847 Valid, 1211 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:24:02,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2022-01-10 08:24:02,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 3257. [2022-01-10 08:24:02,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3257 states, 2668 states have (on average 1.330584707646177) internal successors, (3550), 2714 states have internal predecessors, (3550), 288 states have call successors, (288), 186 states have call predecessors, (288), 299 states have return successors, (513), 357 states have call predecessors, (513), 286 states have call successors, (513) [2022-01-10 08:24:02,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 4351 transitions. [2022-01-10 08:24:02,912 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 4351 transitions. Word has length 145 [2022-01-10 08:24:02,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:02,913 INFO L470 AbstractCegarLoop]: Abstraction has 3257 states and 4351 transitions. [2022-01-10 08:24:02,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:02,913 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 4351 transitions. [2022-01-10 08:24:02,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:02,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:02,919 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:02,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:03,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:03,127 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:03,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:03,128 INFO L85 PathProgramCache]: Analyzing trace with hash -909663833, now seen corresponding path program 1 times [2022-01-10 08:24:03,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:03,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1466538856] [2022-01-10 08:24:03,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:03,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:03,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:03,130 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:03,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 08:24:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:03,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:03,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:03,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:03,397 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:03,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1466538856] [2022-01-10 08:24:03,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1466538856] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:03,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:03,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:03,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623065639] [2022-01-10 08:24:03,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:03,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:03,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:03,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:03,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:03,399 INFO L87 Difference]: Start difference. First operand 3257 states and 4351 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:03,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:03,806 INFO L93 Difference]: Finished difference Result 3840 states and 5250 transitions. [2022-01-10 08:24:03,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:24:03,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:03,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:03,830 INFO L225 Difference]: With dead ends: 3840 [2022-01-10 08:24:03,830 INFO L226 Difference]: Without dead ends: 3257 [2022-01-10 08:24:03,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:24:03,836 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 812 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 1204 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:03,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 1204 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:24:03,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2022-01-10 08:24:03,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 3257. [2022-01-10 08:24:03,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3257 states, 2668 states have (on average 1.327961019490255) internal successors, (3543), 2714 states have internal predecessors, (3543), 288 states have call successors, (288), 186 states have call predecessors, (288), 299 states have return successors, (513), 357 states have call predecessors, (513), 286 states have call successors, (513) [2022-01-10 08:24:04,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 4344 transitions. [2022-01-10 08:24:04,001 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 4344 transitions. Word has length 145 [2022-01-10 08:24:04,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:04,002 INFO L470 AbstractCegarLoop]: Abstraction has 3257 states and 4344 transitions. [2022-01-10 08:24:04,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:04,002 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 4344 transitions. [2022-01-10 08:24:04,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:04,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:04,008 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:04,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:04,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:04,216 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:04,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:04,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1265622229, now seen corresponding path program 1 times [2022-01-10 08:24:04,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:04,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380694466] [2022-01-10 08:24:04,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:04,217 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:04,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:04,218 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:04,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 08:24:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:04,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:04,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:04,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:04,526 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:04,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380694466] [2022-01-10 08:24:04,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380694466] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:04,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:04,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:04,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404166057] [2022-01-10 08:24:04,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:04,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:04,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:04,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:04,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:04,527 INFO L87 Difference]: Start difference. First operand 3257 states and 4344 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:04,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:04,897 INFO L93 Difference]: Finished difference Result 3840 states and 5236 transitions. [2022-01-10 08:24:04,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:24:04,897 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:04,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:04,904 INFO L225 Difference]: With dead ends: 3840 [2022-01-10 08:24:04,904 INFO L226 Difference]: Without dead ends: 3257 [2022-01-10 08:24:04,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:24:04,906 INFO L933 BasicCegarLoop]: 572 mSDtfsCounter, 806 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:04,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 1197 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:24:04,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2022-01-10 08:24:05,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 3257. [2022-01-10 08:24:05,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3257 states, 2668 states have (on average 1.3253373313343328) internal successors, (3536), 2714 states have internal predecessors, (3536), 288 states have call successors, (288), 186 states have call predecessors, (288), 299 states have return successors, (513), 357 states have call predecessors, (513), 286 states have call successors, (513) [2022-01-10 08:24:05,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 4337 transitions. [2022-01-10 08:24:05,032 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 4337 transitions. Word has length 145 [2022-01-10 08:24:05,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:05,032 INFO L470 AbstractCegarLoop]: Abstraction has 3257 states and 4337 transitions. [2022-01-10 08:24:05,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:05,032 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 4337 transitions. [2022-01-10 08:24:05,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:05,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:05,039 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:05,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:05,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:05,248 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:05,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:05,248 INFO L85 PathProgramCache]: Analyzing trace with hash -307273433, now seen corresponding path program 1 times [2022-01-10 08:24:05,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:05,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757391609] [2022-01-10 08:24:05,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:05,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:05,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:05,250 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:05,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 08:24:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:05,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:05,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:05,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:05,537 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:05,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757391609] [2022-01-10 08:24:05,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757391609] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:05,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:05,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:05,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213721332] [2022-01-10 08:24:05,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:05,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:05,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:05,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:05,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:05,539 INFO L87 Difference]: Start difference. First operand 3257 states and 4337 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:05,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:05,971 INFO L93 Difference]: Finished difference Result 3840 states and 5222 transitions. [2022-01-10 08:24:05,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:24:05,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:05,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:05,986 INFO L225 Difference]: With dead ends: 3840 [2022-01-10 08:24:05,986 INFO L226 Difference]: Without dead ends: 3257 [2022-01-10 08:24:05,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:24:05,988 INFO L933 BasicCegarLoop]: 569 mSDtfsCounter, 800 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:05,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 1190 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:24:05,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2022-01-10 08:24:06,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 3257. [2022-01-10 08:24:06,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3257 states, 2668 states have (on average 1.3227136431784108) internal successors, (3529), 2714 states have internal predecessors, (3529), 288 states have call successors, (288), 186 states have call predecessors, (288), 299 states have return successors, (513), 357 states have call predecessors, (513), 286 states have call successors, (513) [2022-01-10 08:24:06,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 4330 transitions. [2022-01-10 08:24:06,111 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 4330 transitions. Word has length 145 [2022-01-10 08:24:06,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:06,112 INFO L470 AbstractCegarLoop]: Abstraction has 3257 states and 4330 transitions. [2022-01-10 08:24:06,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:06,112 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 4330 transitions. [2022-01-10 08:24:06,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:06,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:06,117 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:06,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:06,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:06,325 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:06,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:06,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1589445719, now seen corresponding path program 1 times [2022-01-10 08:24:06,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:06,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762489107] [2022-01-10 08:24:06,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:06,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:06,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:06,327 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:06,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 08:24:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:06,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:06,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:06,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:06,616 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:06,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762489107] [2022-01-10 08:24:06,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762489107] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:06,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:06,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:06,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640790963] [2022-01-10 08:24:06,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:06,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:06,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:06,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:06,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:06,618 INFO L87 Difference]: Start difference. First operand 3257 states and 4330 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:07,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:07,013 INFO L93 Difference]: Finished difference Result 3840 states and 5208 transitions. [2022-01-10 08:24:07,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:24:07,013 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:07,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:07,021 INFO L225 Difference]: With dead ends: 3840 [2022-01-10 08:24:07,022 INFO L226 Difference]: Without dead ends: 3257 [2022-01-10 08:24:07,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:24:07,024 INFO L933 BasicCegarLoop]: 566 mSDtfsCounter, 793 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:07,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [822 Valid, 1183 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:24:07,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2022-01-10 08:24:07,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 3257. [2022-01-10 08:24:07,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3257 states, 2668 states have (on average 1.3200899550224887) internal successors, (3522), 2714 states have internal predecessors, (3522), 288 states have call successors, (288), 186 states have call predecessors, (288), 299 states have return successors, (513), 357 states have call predecessors, (513), 286 states have call successors, (513) [2022-01-10 08:24:07,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 4323 transitions. [2022-01-10 08:24:07,151 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 4323 transitions. Word has length 145 [2022-01-10 08:24:07,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:07,151 INFO L470 AbstractCegarLoop]: Abstraction has 3257 states and 4323 transitions. [2022-01-10 08:24:07,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:07,151 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 4323 transitions. [2022-01-10 08:24:07,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:07,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:07,159 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:07,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:07,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:07,367 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:07,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:07,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1685118765, now seen corresponding path program 1 times [2022-01-10 08:24:07,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:07,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894430061] [2022-01-10 08:24:07,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:07,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:07,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:07,369 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:07,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 08:24:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:07,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:07,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:07,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:07,666 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:07,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894430061] [2022-01-10 08:24:07,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894430061] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:07,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:07,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:07,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437314447] [2022-01-10 08:24:07,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:07,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:07,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:07,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:07,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:07,668 INFO L87 Difference]: Start difference. First operand 3257 states and 4323 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:08,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:08,066 INFO L93 Difference]: Finished difference Result 3840 states and 5194 transitions. [2022-01-10 08:24:08,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:24:08,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:08,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:08,074 INFO L225 Difference]: With dead ends: 3840 [2022-01-10 08:24:08,074 INFO L226 Difference]: Without dead ends: 3257 [2022-01-10 08:24:08,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:24:08,077 INFO L933 BasicCegarLoop]: 563 mSDtfsCounter, 787 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:08,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [816 Valid, 1176 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:24:08,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2022-01-10 08:24:08,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 3257. [2022-01-10 08:24:08,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3257 states, 2668 states have (on average 1.3174662668665666) internal successors, (3515), 2714 states have internal predecessors, (3515), 288 states have call successors, (288), 186 states have call predecessors, (288), 299 states have return successors, (513), 357 states have call predecessors, (513), 286 states have call successors, (513) [2022-01-10 08:24:08,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 4316 transitions. [2022-01-10 08:24:08,222 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 4316 transitions. Word has length 145 [2022-01-10 08:24:08,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:08,222 INFO L470 AbstractCegarLoop]: Abstraction has 3257 states and 4316 transitions. [2022-01-10 08:24:08,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:08,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 4316 transitions. [2022-01-10 08:24:08,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:08,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:08,228 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:08,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:08,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:08,436 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:08,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:08,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1375107881, now seen corresponding path program 1 times [2022-01-10 08:24:08,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:08,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1569569117] [2022-01-10 08:24:08,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:08,437 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:08,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:08,438 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:08,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 08:24:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:08,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:08,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:08,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:08,702 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:08,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1569569117] [2022-01-10 08:24:08,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1569569117] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:08,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:08,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:08,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317798951] [2022-01-10 08:24:08,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:08,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:08,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:08,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:08,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:08,704 INFO L87 Difference]: Start difference. First operand 3257 states and 4316 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:09,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:09,222 INFO L93 Difference]: Finished difference Result 3990 states and 5412 transitions. [2022-01-10 08:24:09,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:24:09,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:09,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:09,231 INFO L225 Difference]: With dead ends: 3990 [2022-01-10 08:24:09,231 INFO L226 Difference]: Without dead ends: 3407 [2022-01-10 08:24:09,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:24:09,234 INFO L933 BasicCegarLoop]: 560 mSDtfsCounter, 877 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:09,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [906 Valid, 1168 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:24:09,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2022-01-10 08:24:09,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 3407. [2022-01-10 08:24:09,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3407 states, 2812 states have (on average 1.3193456614509247) internal successors, (3710), 2858 states have internal predecessors, (3710), 290 states have call successors, (290), 190 states have call predecessors, (290), 303 states have return successors, (515), 359 states have call predecessors, (515), 288 states have call successors, (515) [2022-01-10 08:24:09,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3407 states to 3407 states and 4515 transitions. [2022-01-10 08:24:09,394 INFO L78 Accepts]: Start accepts. Automaton has 3407 states and 4515 transitions. Word has length 145 [2022-01-10 08:24:09,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:09,395 INFO L470 AbstractCegarLoop]: Abstraction has 3407 states and 4515 transitions. [2022-01-10 08:24:09,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:09,395 INFO L276 IsEmpty]: Start isEmpty. Operand 3407 states and 4515 transitions. [2022-01-10 08:24:09,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:09,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:09,401 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:09,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:09,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:09,609 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:09,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:09,609 INFO L85 PathProgramCache]: Analyzing trace with hash 395276205, now seen corresponding path program 1 times [2022-01-10 08:24:09,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:09,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916109149] [2022-01-10 08:24:09,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:09,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:09,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:09,611 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:09,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 08:24:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:09,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:09,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:09,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:09,870 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:09,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916109149] [2022-01-10 08:24:09,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916109149] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:09,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:09,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:09,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174364972] [2022-01-10 08:24:09,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:09,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:09,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:09,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:09,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:09,871 INFO L87 Difference]: Start difference. First operand 3407 states and 4515 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:10,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:10,349 INFO L93 Difference]: Finished difference Result 4290 states and 5810 transitions. [2022-01-10 08:24:10,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:24:10,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:10,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:10,359 INFO L225 Difference]: With dead ends: 4290 [2022-01-10 08:24:10,359 INFO L226 Difference]: Without dead ends: 3557 [2022-01-10 08:24:10,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:24:10,362 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 870 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:10,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [899 Valid, 1162 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:24:10,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2022-01-10 08:24:10,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 3557. [2022-01-10 08:24:10,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3557 states, 2956 states have (on average 1.3196887686062246) internal successors, (3901), 3002 states have internal predecessors, (3901), 292 states have call successors, (292), 194 states have call predecessors, (292), 307 states have return successors, (517), 361 states have call predecessors, (517), 290 states have call successors, (517) [2022-01-10 08:24:10,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3557 states to 3557 states and 4710 transitions. [2022-01-10 08:24:10,515 INFO L78 Accepts]: Start accepts. Automaton has 3557 states and 4710 transitions. Word has length 145 [2022-01-10 08:24:10,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:10,515 INFO L470 AbstractCegarLoop]: Abstraction has 3557 states and 4710 transitions. [2022-01-10 08:24:10,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:10,516 INFO L276 IsEmpty]: Start isEmpty. Operand 3557 states and 4710 transitions. [2022-01-10 08:24:10,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:10,521 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:10,521 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:10,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:10,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:10,732 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:10,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:10,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1760612906, now seen corresponding path program 1 times [2022-01-10 08:24:10,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:10,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1427476826] [2022-01-10 08:24:10,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:10,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:10,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:10,734 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:10,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 08:24:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:10,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:10,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:11,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:11,016 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:11,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1427476826] [2022-01-10 08:24:11,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1427476826] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:11,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:11,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:11,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378657078] [2022-01-10 08:24:11,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:11,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:11,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:11,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:11,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:11,017 INFO L87 Difference]: Start difference. First operand 3557 states and 4710 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:11,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:11,515 INFO L93 Difference]: Finished difference Result 4590 states and 6200 transitions. [2022-01-10 08:24:11,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:24:11,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:11,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:11,523 INFO L225 Difference]: With dead ends: 4590 [2022-01-10 08:24:11,523 INFO L226 Difference]: Without dead ends: 3707 [2022-01-10 08:24:11,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:24:11,526 INFO L933 BasicCegarLoop]: 553 mSDtfsCounter, 864 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:11,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 1153 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:24:11,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3707 states. [2022-01-10 08:24:11,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3707 to 3707. [2022-01-10 08:24:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3707 states, 3100 states have (on average 1.3187096774193547) internal successors, (4088), 3146 states have internal predecessors, (4088), 294 states have call successors, (294), 198 states have call predecessors, (294), 311 states have return successors, (519), 363 states have call predecessors, (519), 292 states have call successors, (519) [2022-01-10 08:24:11,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3707 states to 3707 states and 4901 transitions. [2022-01-10 08:24:11,692 INFO L78 Accepts]: Start accepts. Automaton has 3707 states and 4901 transitions. Word has length 145 [2022-01-10 08:24:11,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:11,692 INFO L470 AbstractCegarLoop]: Abstraction has 3707 states and 4901 transitions. [2022-01-10 08:24:11,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:11,693 INFO L276 IsEmpty]: Start isEmpty. Operand 3707 states and 4901 transitions. [2022-01-10 08:24:11,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:11,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:11,698 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:11,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:11,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:11,906 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:11,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:11,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1116018606, now seen corresponding path program 1 times [2022-01-10 08:24:11,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:11,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456884408] [2022-01-10 08:24:11,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:11,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:11,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:11,908 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:11,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 08:24:12,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:12,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:12,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:12,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:12,173 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:12,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456884408] [2022-01-10 08:24:12,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456884408] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:12,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:12,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:12,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060227297] [2022-01-10 08:24:12,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:12,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:12,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:12,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:12,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:12,174 INFO L87 Difference]: Start difference. First operand 3707 states and 4901 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:12,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:12,705 INFO L93 Difference]: Finished difference Result 4890 states and 6582 transitions. [2022-01-10 08:24:12,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:24:12,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:12,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:12,713 INFO L225 Difference]: With dead ends: 4890 [2022-01-10 08:24:12,713 INFO L226 Difference]: Without dead ends: 3857 [2022-01-10 08:24:12,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:24:12,717 INFO L933 BasicCegarLoop]: 550 mSDtfsCounter, 857 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:12,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 1146 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:24:12,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3857 states. [2022-01-10 08:24:12,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3857 to 3857. [2022-01-10 08:24:12,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3857 states, 3244 states have (on average 1.316584463625154) internal successors, (4271), 3290 states have internal predecessors, (4271), 296 states have call successors, (296), 202 states have call predecessors, (296), 315 states have return successors, (521), 365 states have call predecessors, (521), 294 states have call successors, (521) [2022-01-10 08:24:12,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 5088 transitions. [2022-01-10 08:24:12,864 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 5088 transitions. Word has length 145 [2022-01-10 08:24:12,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:12,864 INFO L470 AbstractCegarLoop]: Abstraction has 3857 states and 5088 transitions. [2022-01-10 08:24:12,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:12,864 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 5088 transitions. [2022-01-10 08:24:12,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:12,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:12,873 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:12,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:13,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:13,081 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:13,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:13,081 INFO L85 PathProgramCache]: Analyzing trace with hash 249266859, now seen corresponding path program 1 times [2022-01-10 08:24:13,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:13,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795992119] [2022-01-10 08:24:13,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:13,081 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:13,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:13,082 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:13,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 08:24:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:13,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:13,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:13,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:13,351 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:13,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795992119] [2022-01-10 08:24:13,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795992119] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:13,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:13,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:13,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634332961] [2022-01-10 08:24:13,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:13,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:13,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:13,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:13,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:13,352 INFO L87 Difference]: Start difference. First operand 3857 states and 5088 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:14,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:14,043 INFO L93 Difference]: Finished difference Result 5190 states and 6956 transitions. [2022-01-10 08:24:14,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:24:14,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:14,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:14,051 INFO L225 Difference]: With dead ends: 5190 [2022-01-10 08:24:14,051 INFO L226 Difference]: Without dead ends: 4007 [2022-01-10 08:24:14,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:24:14,054 INFO L933 BasicCegarLoop]: 547 mSDtfsCounter, 850 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:14,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [879 Valid, 1139 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 08:24:14,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2022-01-10 08:24:14,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 4007. [2022-01-10 08:24:14,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4007 states, 3388 states have (on average 1.3134592680047226) internal successors, (4450), 3434 states have internal predecessors, (4450), 298 states have call successors, (298), 206 states have call predecessors, (298), 319 states have return successors, (523), 367 states have call predecessors, (523), 296 states have call successors, (523) [2022-01-10 08:24:14,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4007 states to 4007 states and 5271 transitions. [2022-01-10 08:24:14,211 INFO L78 Accepts]: Start accepts. Automaton has 4007 states and 5271 transitions. Word has length 145 [2022-01-10 08:24:14,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:14,212 INFO L470 AbstractCegarLoop]: Abstraction has 4007 states and 5271 transitions. [2022-01-10 08:24:14,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:14,212 INFO L276 IsEmpty]: Start isEmpty. Operand 4007 states and 5271 transitions. [2022-01-10 08:24:14,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:14,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:14,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:14,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:14,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:14,425 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:14,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:14,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1054557422, now seen corresponding path program 1 times [2022-01-10 08:24:14,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:14,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065034447] [2022-01-10 08:24:14,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:14,426 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:14,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:14,427 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:14,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 08:24:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:14,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:14,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:14,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:14,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:14,738 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:14,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065034447] [2022-01-10 08:24:14,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065034447] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:14,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:14,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:14,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670132405] [2022-01-10 08:24:14,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:14,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:14,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:14,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:14,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:14,740 INFO L87 Difference]: Start difference. First operand 4007 states and 5271 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:15,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:15,294 INFO L93 Difference]: Finished difference Result 5490 states and 7322 transitions. [2022-01-10 08:24:15,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:24:15,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:15,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:15,302 INFO L225 Difference]: With dead ends: 5490 [2022-01-10 08:24:15,302 INFO L226 Difference]: Without dead ends: 4157 [2022-01-10 08:24:15,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:24:15,305 INFO L933 BasicCegarLoop]: 544 mSDtfsCounter, 842 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 1132 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:15,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 1132 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:24:15,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4157 states. [2022-01-10 08:24:15,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4157 to 4157. [2022-01-10 08:24:15,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4157 states, 3532 states have (on average 1.3094563986409966) internal successors, (4625), 3578 states have internal predecessors, (4625), 300 states have call successors, (300), 210 states have call predecessors, (300), 323 states have return successors, (525), 369 states have call predecessors, (525), 298 states have call successors, (525) [2022-01-10 08:24:15,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4157 states to 4157 states and 5450 transitions. [2022-01-10 08:24:15,474 INFO L78 Accepts]: Start accepts. Automaton has 4157 states and 5450 transitions. Word has length 145 [2022-01-10 08:24:15,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:15,474 INFO L470 AbstractCegarLoop]: Abstraction has 4157 states and 5450 transitions. [2022-01-10 08:24:15,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:15,474 INFO L276 IsEmpty]: Start isEmpty. Operand 4157 states and 5450 transitions. [2022-01-10 08:24:15,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:15,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:15,478 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:15,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-01-10 08:24:15,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:15,686 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:15,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:15,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1411822669, now seen corresponding path program 1 times [2022-01-10 08:24:15,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:15,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047404065] [2022-01-10 08:24:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:15,687 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:15,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:15,688 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:15,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 08:24:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:15,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:15,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:15,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:15,976 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:15,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047404065] [2022-01-10 08:24:15,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1047404065] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:15,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:15,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:15,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106325117] [2022-01-10 08:24:15,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:15,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:15,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:15,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:15,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:15,977 INFO L87 Difference]: Start difference. First operand 4157 states and 5450 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:16,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:16,552 INFO L93 Difference]: Finished difference Result 5790 states and 7680 transitions. [2022-01-10 08:24:16,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:24:16,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:16,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:16,563 INFO L225 Difference]: With dead ends: 5790 [2022-01-10 08:24:16,563 INFO L226 Difference]: Without dead ends: 4307 [2022-01-10 08:24:16,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:24:16,568 INFO L933 BasicCegarLoop]: 541 mSDtfsCounter, 835 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:16,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [864 Valid, 1125 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:24:16,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4307 states. [2022-01-10 08:24:16,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4307 to 4307. [2022-01-10 08:24:16,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4307 states, 3676 states have (on average 1.3046789989118608) internal successors, (4796), 3722 states have internal predecessors, (4796), 302 states have call successors, (302), 214 states have call predecessors, (302), 327 states have return successors, (527), 371 states have call predecessors, (527), 300 states have call successors, (527) [2022-01-10 08:24:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4307 states to 4307 states and 5625 transitions. [2022-01-10 08:24:16,798 INFO L78 Accepts]: Start accepts. Automaton has 4307 states and 5625 transitions. Word has length 145 [2022-01-10 08:24:16,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:16,799 INFO L470 AbstractCegarLoop]: Abstraction has 4307 states and 5625 transitions. [2022-01-10 08:24:16,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:16,799 INFO L276 IsEmpty]: Start isEmpty. Operand 4307 states and 5625 transitions. [2022-01-10 08:24:16,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:16,804 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:16,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:16,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:17,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:17,013 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:17,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:17,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1128833967, now seen corresponding path program 1 times [2022-01-10 08:24:17,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:17,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578372896] [2022-01-10 08:24:17,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:17,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:17,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:17,015 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:17,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-01-10 08:24:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:17,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:17,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:17,277 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 08:24:17,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:17,277 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:17,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578372896] [2022-01-10 08:24:17,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578372896] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:17,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:17,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:17,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147554824] [2022-01-10 08:24:17,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:17,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:17,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:17,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:17,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:17,278 INFO L87 Difference]: Start difference. First operand 4307 states and 5625 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:17,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:17,917 INFO L93 Difference]: Finished difference Result 6090 states and 8030 transitions. [2022-01-10 08:24:17,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:24:17,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:17,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:17,926 INFO L225 Difference]: With dead ends: 6090 [2022-01-10 08:24:17,926 INFO L226 Difference]: Without dead ends: 4457 [2022-01-10 08:24:17,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:24:17,929 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 828 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:17,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 1118 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:24:17,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4457 states. [2022-01-10 08:24:18,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4457 to 4457. [2022-01-10 08:24:18,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4457 states, 3820 states have (on average 1.2992146596858638) internal successors, (4963), 3866 states have internal predecessors, (4963), 304 states have call successors, (304), 218 states have call predecessors, (304), 331 states have return successors, (529), 373 states have call predecessors, (529), 302 states have call successors, (529) [2022-01-10 08:24:18,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4457 states to 4457 states and 5796 transitions. [2022-01-10 08:24:18,140 INFO L78 Accepts]: Start accepts. Automaton has 4457 states and 5796 transitions. Word has length 145 [2022-01-10 08:24:18,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:18,141 INFO L470 AbstractCegarLoop]: Abstraction has 4457 states and 5796 transitions. [2022-01-10 08:24:18,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:18,141 INFO L276 IsEmpty]: Start isEmpty. Operand 4457 states and 5796 transitions. [2022-01-10 08:24:18,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:18,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:18,146 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:18,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:18,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:18,354 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:18,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:18,355 INFO L85 PathProgramCache]: Analyzing trace with hash -864103180, now seen corresponding path program 1 times [2022-01-10 08:24:18,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:18,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234811310] [2022-01-10 08:24:18,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:18,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:18,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:18,356 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:18,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 08:24:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:18,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:18,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:18,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:18,633 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:18,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234811310] [2022-01-10 08:24:18,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234811310] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:18,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:18,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:18,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630861083] [2022-01-10 08:24:18,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:18,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:18,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:18,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:18,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:18,635 INFO L87 Difference]: Start difference. First operand 4457 states and 5796 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:19,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:19,241 INFO L93 Difference]: Finished difference Result 6390 states and 8372 transitions. [2022-01-10 08:24:19,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:24:19,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:19,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:19,249 INFO L225 Difference]: With dead ends: 6390 [2022-01-10 08:24:19,250 INFO L226 Difference]: Without dead ends: 4607 [2022-01-10 08:24:19,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:24:19,253 INFO L933 BasicCegarLoop]: 535 mSDtfsCounter, 821 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:19,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [850 Valid, 1111 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:24:19,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4607 states. [2022-01-10 08:24:19,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4607 to 4607. [2022-01-10 08:24:19,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4607 states, 3964 states have (on average 1.2931382441977801) internal successors, (5126), 4010 states have internal predecessors, (5126), 306 states have call successors, (306), 222 states have call predecessors, (306), 335 states have return successors, (531), 375 states have call predecessors, (531), 304 states have call successors, (531) [2022-01-10 08:24:19,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4607 states to 4607 states and 5963 transitions. [2022-01-10 08:24:19,459 INFO L78 Accepts]: Start accepts. Automaton has 4607 states and 5963 transitions. Word has length 145 [2022-01-10 08:24:19,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:19,459 INFO L470 AbstractCegarLoop]: Abstraction has 4607 states and 5963 transitions. [2022-01-10 08:24:19,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:19,460 INFO L276 IsEmpty]: Start isEmpty. Operand 4607 states and 5963 transitions. [2022-01-10 08:24:19,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:19,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:19,463 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:19,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:19,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:19,671 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:19,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:19,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1989934064, now seen corresponding path program 1 times [2022-01-10 08:24:19,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:19,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087547280] [2022-01-10 08:24:19,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:19,671 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:19,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:19,672 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:19,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 08:24:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:19,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:19,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:19,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:19,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:19,924 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:19,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087547280] [2022-01-10 08:24:19,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087547280] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:19,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:19,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:24:19,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486781482] [2022-01-10 08:24:19,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:19,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:19,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:19,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:19,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:19,925 INFO L87 Difference]: Start difference. First operand 4607 states and 5963 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:20,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:20,149 INFO L93 Difference]: Finished difference Result 6805 states and 8853 transitions. [2022-01-10 08:24:20,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:24:20,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:20,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:20,159 INFO L225 Difference]: With dead ends: 6805 [2022-01-10 08:24:20,159 INFO L226 Difference]: Without dead ends: 4873 [2022-01-10 08:24:20,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:24:20,164 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 362 mSDsluCounter, 1858 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 2431 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:20,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 2431 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:20,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4873 states. [2022-01-10 08:24:20,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4873 to 4613. [2022-01-10 08:24:20,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 3970 states have (on average 1.2881612090680101) internal successors, (5114), 4016 states have internal predecessors, (5114), 306 states have call successors, (306), 222 states have call predecessors, (306), 335 states have return successors, (531), 375 states have call predecessors, (531), 304 states have call successors, (531) [2022-01-10 08:24:20,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 5951 transitions. [2022-01-10 08:24:20,377 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 5951 transitions. Word has length 145 [2022-01-10 08:24:20,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:20,377 INFO L470 AbstractCegarLoop]: Abstraction has 4613 states and 5951 transitions. [2022-01-10 08:24:20,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:20,377 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 5951 transitions. [2022-01-10 08:24:20,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:20,381 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:20,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:20,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:20,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:20,588 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:20,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:20,589 INFO L85 PathProgramCache]: Analyzing trace with hash -703962126, now seen corresponding path program 1 times [2022-01-10 08:24:20,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:20,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656249180] [2022-01-10 08:24:20,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:20,589 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:20,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:20,590 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:20,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-01-10 08:24:20,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:20,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:20,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:20,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:20,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:20,876 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:20,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656249180] [2022-01-10 08:24:20,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656249180] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:20,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:20,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:24:20,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287775934] [2022-01-10 08:24:20,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:20,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:20,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:20,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:20,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:20,877 INFO L87 Difference]: Start difference. First operand 4613 states and 5951 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:21,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:21,089 INFO L93 Difference]: Finished difference Result 6789 states and 8793 transitions. [2022-01-10 08:24:21,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:24:21,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:21,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:21,100 INFO L225 Difference]: With dead ends: 6789 [2022-01-10 08:24:21,101 INFO L226 Difference]: Without dead ends: 4851 [2022-01-10 08:24:21,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:24:21,106 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 323 mSDsluCounter, 1849 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 2424 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:21,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 2424 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:21,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4851 states. [2022-01-10 08:24:21,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4851 to 4619. [2022-01-10 08:24:21,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4619 states, 3976 states have (on average 1.2831991951710262) internal successors, (5102), 4022 states have internal predecessors, (5102), 306 states have call successors, (306), 222 states have call predecessors, (306), 335 states have return successors, (531), 375 states have call predecessors, (531), 304 states have call successors, (531) [2022-01-10 08:24:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4619 states to 4619 states and 5939 transitions. [2022-01-10 08:24:21,344 INFO L78 Accepts]: Start accepts. Automaton has 4619 states and 5939 transitions. Word has length 145 [2022-01-10 08:24:21,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:21,344 INFO L470 AbstractCegarLoop]: Abstraction has 4619 states and 5939 transitions. [2022-01-10 08:24:21,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:21,344 INFO L276 IsEmpty]: Start isEmpty. Operand 4619 states and 5939 transitions. [2022-01-10 08:24:21,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:21,348 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:21,348 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:21,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:21,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:21,556 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:21,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:21,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1650423156, now seen corresponding path program 1 times [2022-01-10 08:24:21,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:21,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042592731] [2022-01-10 08:24:21,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:21,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:21,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:21,558 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:21,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-01-10 08:24:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:21,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:21,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:21,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:21,807 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:21,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042592731] [2022-01-10 08:24:21,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042592731] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:21,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:21,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:24:21,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91485456] [2022-01-10 08:24:21,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:21,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:21,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:21,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:21,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:21,808 INFO L87 Difference]: Start difference. First operand 4619 states and 5939 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:22,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:22,048 INFO L93 Difference]: Finished difference Result 6773 states and 8733 transitions. [2022-01-10 08:24:22,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:24:22,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:22,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:22,059 INFO L225 Difference]: With dead ends: 6773 [2022-01-10 08:24:22,059 INFO L226 Difference]: Without dead ends: 4829 [2022-01-10 08:24:22,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:24:22,066 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 284 mSDsluCounter, 1828 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 2401 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:22,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 2401 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:22,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4829 states. [2022-01-10 08:24:22,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4829 to 4625. [2022-01-10 08:24:22,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4625 states, 3982 states have (on average 1.2782521346057258) internal successors, (5090), 4028 states have internal predecessors, (5090), 306 states have call successors, (306), 222 states have call predecessors, (306), 335 states have return successors, (531), 375 states have call predecessors, (531), 304 states have call successors, (531) [2022-01-10 08:24:22,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4625 states to 4625 states and 5927 transitions. [2022-01-10 08:24:22,315 INFO L78 Accepts]: Start accepts. Automaton has 4625 states and 5927 transitions. Word has length 145 [2022-01-10 08:24:22,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:22,315 INFO L470 AbstractCegarLoop]: Abstraction has 4625 states and 5927 transitions. [2022-01-10 08:24:22,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:22,315 INFO L276 IsEmpty]: Start isEmpty. Operand 4625 states and 5927 transitions. [2022-01-10 08:24:22,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:22,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:22,319 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:22,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:22,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:22,523 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:22,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:22,523 INFO L85 PathProgramCache]: Analyzing trace with hash -768061322, now seen corresponding path program 1 times [2022-01-10 08:24:22,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:22,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487619422] [2022-01-10 08:24:22,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:22,524 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:22,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:22,525 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:22,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-01-10 08:24:22,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:22,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:22,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:22,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:22,771 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:22,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487619422] [2022-01-10 08:24:22,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487619422] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:22,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:22,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:24:22,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4860341] [2022-01-10 08:24:22,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:22,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:22,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:22,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:22,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:22,772 INFO L87 Difference]: Start difference. First operand 4625 states and 5927 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:23,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:23,019 INFO L93 Difference]: Finished difference Result 6757 states and 8673 transitions. [2022-01-10 08:24:23,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:24:23,019 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:23,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:23,027 INFO L225 Difference]: With dead ends: 6757 [2022-01-10 08:24:23,027 INFO L226 Difference]: Without dead ends: 4807 [2022-01-10 08:24:23,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:24:23,031 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 245 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 2386 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:23,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 2386 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:23,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4807 states. [2022-01-10 08:24:23,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4807 to 4631. [2022-01-10 08:24:23,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4631 states, 3988 states have (on average 1.273319959879639) internal successors, (5078), 4034 states have internal predecessors, (5078), 306 states have call successors, (306), 222 states have call predecessors, (306), 335 states have return successors, (531), 375 states have call predecessors, (531), 304 states have call successors, (531) [2022-01-10 08:24:23,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4631 states to 4631 states and 5915 transitions. [2022-01-10 08:24:23,271 INFO L78 Accepts]: Start accepts. Automaton has 4631 states and 5915 transitions. Word has length 145 [2022-01-10 08:24:23,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:23,271 INFO L470 AbstractCegarLoop]: Abstraction has 4631 states and 5915 transitions. [2022-01-10 08:24:23,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:23,271 INFO L276 IsEmpty]: Start isEmpty. Operand 4631 states and 5915 transitions. [2022-01-10 08:24:23,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:23,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:23,275 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:23,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-01-10 08:24:23,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:23,476 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:23,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:23,476 INFO L85 PathProgramCache]: Analyzing trace with hash -527821576, now seen corresponding path program 1 times [2022-01-10 08:24:23,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:23,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1664010665] [2022-01-10 08:24:23,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:23,477 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:23,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:23,478 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:23,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-01-10 08:24:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:23,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:23,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:23,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:23,722 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:23,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1664010665] [2022-01-10 08:24:23,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1664010665] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:23,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:23,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:24:23,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534357993] [2022-01-10 08:24:23,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:23,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:23,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:23,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:23,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:23,724 INFO L87 Difference]: Start difference. First operand 4631 states and 5915 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:24,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:24,035 INFO L93 Difference]: Finished difference Result 6741 states and 8613 transitions. [2022-01-10 08:24:24,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:24:24,036 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:24,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:24,044 INFO L225 Difference]: With dead ends: 6741 [2022-01-10 08:24:24,044 INFO L226 Difference]: Without dead ends: 4785 [2022-01-10 08:24:24,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:24:24,048 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 206 mSDsluCounter, 1798 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 2371 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:24,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 2371 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:24,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4785 states. [2022-01-10 08:24:24,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4785 to 4637. [2022-01-10 08:24:24,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4637 states, 3994 states have (on average 1.2684026039058587) internal successors, (5066), 4040 states have internal predecessors, (5066), 306 states have call successors, (306), 222 states have call predecessors, (306), 335 states have return successors, (531), 375 states have call predecessors, (531), 304 states have call successors, (531) [2022-01-10 08:24:24,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 5903 transitions. [2022-01-10 08:24:24,305 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 5903 transitions. Word has length 145 [2022-01-10 08:24:24,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:24,305 INFO L470 AbstractCegarLoop]: Abstraction has 4637 states and 5903 transitions. [2022-01-10 08:24:24,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:24,305 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 5903 transitions. [2022-01-10 08:24:24,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:24,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:24,309 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:24,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:24,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:24,510 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:24,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:24,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1856103162, now seen corresponding path program 1 times [2022-01-10 08:24:24,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:24,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783099794] [2022-01-10 08:24:24,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:24,511 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:24,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:24,512 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:24,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-01-10 08:24:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:24,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:24,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:24,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:24,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:24,751 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:24,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783099794] [2022-01-10 08:24:24,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783099794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:24,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:24,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:24:24,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683785114] [2022-01-10 08:24:24,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:24,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:24,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:24,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:24,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:24,752 INFO L87 Difference]: Start difference. First operand 4637 states and 5903 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:25,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:25,007 INFO L93 Difference]: Finished difference Result 6697 states and 8513 transitions. [2022-01-10 08:24:25,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:24:25,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:25,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:25,015 INFO L225 Difference]: With dead ends: 6697 [2022-01-10 08:24:25,015 INFO L226 Difference]: Without dead ends: 4735 [2022-01-10 08:24:25,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:24:25,019 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 127 mSDsluCounter, 1763 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 2336 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:25,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 2336 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:25,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4735 states. [2022-01-10 08:24:25,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4735 to 4643. [2022-01-10 08:24:25,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4643 states, 4000 states have (on average 1.2635) internal successors, (5054), 4046 states have internal predecessors, (5054), 306 states have call successors, (306), 222 states have call predecessors, (306), 335 states have return successors, (531), 375 states have call predecessors, (531), 304 states have call successors, (531) [2022-01-10 08:24:25,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 5891 transitions. [2022-01-10 08:24:25,262 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 5891 transitions. Word has length 145 [2022-01-10 08:24:25,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:25,262 INFO L470 AbstractCegarLoop]: Abstraction has 4643 states and 5891 transitions. [2022-01-10 08:24:25,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:25,262 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 5891 transitions. [2022-01-10 08:24:25,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:25,267 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:25,267 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:25,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-01-10 08:24:25,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:25,474 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:25,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:25,474 INFO L85 PathProgramCache]: Analyzing trace with hash -477289476, now seen corresponding path program 1 times [2022-01-10 08:24:25,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:25,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27851697] [2022-01-10 08:24:25,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:25,474 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:25,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:25,475 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:25,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-01-10 08:24:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:25,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:25,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:25,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:25,720 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:25,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27851697] [2022-01-10 08:24:25,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27851697] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:25,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:25,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:24:25,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269218986] [2022-01-10 08:24:25,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:25,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:25,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:25,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:25,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:25,722 INFO L87 Difference]: Start difference. First operand 4643 states and 5891 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:25,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:25,980 INFO L93 Difference]: Finished difference Result 6681 states and 8453 transitions. [2022-01-10 08:24:25,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:24:25,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:25,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:25,989 INFO L225 Difference]: With dead ends: 6681 [2022-01-10 08:24:25,989 INFO L226 Difference]: Without dead ends: 4713 [2022-01-10 08:24:25,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:24:25,992 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 88 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 2321 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:25,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 2321 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:25,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4713 states. [2022-01-10 08:24:26,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4713 to 4649. [2022-01-10 08:24:26,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4649 states, 4006 states have (on average 1.2586120818771842) internal successors, (5042), 4052 states have internal predecessors, (5042), 306 states have call successors, (306), 222 states have call predecessors, (306), 335 states have return successors, (531), 375 states have call predecessors, (531), 304 states have call successors, (531) [2022-01-10 08:24:26,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4649 states to 4649 states and 5879 transitions. [2022-01-10 08:24:26,237 INFO L78 Accepts]: Start accepts. Automaton has 4649 states and 5879 transitions. Word has length 145 [2022-01-10 08:24:26,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:26,237 INFO L470 AbstractCegarLoop]: Abstraction has 4649 states and 5879 transitions. [2022-01-10 08:24:26,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:26,237 INFO L276 IsEmpty]: Start isEmpty. Operand 4649 states and 5879 transitions. [2022-01-10 08:24:26,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:26,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:26,241 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:26,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-01-10 08:24:26,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:26,442 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:26,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:26,442 INFO L85 PathProgramCache]: Analyzing trace with hash 909495934, now seen corresponding path program 1 times [2022-01-10 08:24:26,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:26,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312051522] [2022-01-10 08:24:26,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:26,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:26,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:26,444 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:26,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-01-10 08:24:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:26,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:26,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:26,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:26,702 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:26,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312051522] [2022-01-10 08:24:26,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312051522] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:26,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:26,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:24:26,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411686049] [2022-01-10 08:24:26,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:26,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:26,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:26,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:26,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:26,703 INFO L87 Difference]: Start difference. First operand 4649 states and 5879 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:26,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:26,955 INFO L93 Difference]: Finished difference Result 6665 states and 8393 transitions. [2022-01-10 08:24:26,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:24:26,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:26,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:26,964 INFO L225 Difference]: With dead ends: 6665 [2022-01-10 08:24:26,964 INFO L226 Difference]: Without dead ends: 4691 [2022-01-10 08:24:26,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:24:26,967 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 49 mSDsluCounter, 1733 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 2306 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:26,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 2306 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:26,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2022-01-10 08:24:27,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 4655. [2022-01-10 08:24:27,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4012 states have (on average 1.2537387836490528) internal successors, (5030), 4058 states have internal predecessors, (5030), 306 states have call successors, (306), 222 states have call predecessors, (306), 335 states have return successors, (531), 375 states have call predecessors, (531), 304 states have call successors, (531) [2022-01-10 08:24:27,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 5867 transitions. [2022-01-10 08:24:27,201 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 5867 transitions. Word has length 145 [2022-01-10 08:24:27,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:27,201 INFO L470 AbstractCegarLoop]: Abstraction has 4655 states and 5867 transitions. [2022-01-10 08:24:27,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:27,201 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 5867 transitions. [2022-01-10 08:24:27,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:27,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:27,205 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:27,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:27,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:27,412 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:27,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:27,413 INFO L85 PathProgramCache]: Analyzing trace with hash 893977216, now seen corresponding path program 1 times [2022-01-10 08:24:27,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:27,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899890459] [2022-01-10 08:24:27,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:27,413 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:27,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:27,414 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:27,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-01-10 08:24:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:27,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:27,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:27,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:27,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:27,683 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:27,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899890459] [2022-01-10 08:24:27,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899890459] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:27,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:27,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:24:27,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225823219] [2022-01-10 08:24:27,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:27,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:27,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:27,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:27,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:27,684 INFO L87 Difference]: Start difference. First operand 4655 states and 5867 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:27,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:27,934 INFO L93 Difference]: Finished difference Result 6649 states and 8333 transitions. [2022-01-10 08:24:27,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:24:27,935 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:27,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:27,943 INFO L225 Difference]: With dead ends: 6649 [2022-01-10 08:24:27,943 INFO L226 Difference]: Without dead ends: 4669 [2022-01-10 08:24:27,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:24:27,946 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 10 mSDsluCounter, 1718 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2291 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:27,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 2291 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:27,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4669 states. [2022-01-10 08:24:28,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4669 to 4661. [2022-01-10 08:24:28,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4661 states, 4018 states have (on average 1.2488800398208064) internal successors, (5018), 4064 states have internal predecessors, (5018), 306 states have call successors, (306), 222 states have call predecessors, (306), 335 states have return successors, (531), 375 states have call predecessors, (531), 304 states have call successors, (531) [2022-01-10 08:24:28,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 5855 transitions. [2022-01-10 08:24:28,212 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 5855 transitions. Word has length 145 [2022-01-10 08:24:28,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:28,213 INFO L470 AbstractCegarLoop]: Abstraction has 4661 states and 5855 transitions. [2022-01-10 08:24:28,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:28,213 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 5855 transitions. [2022-01-10 08:24:28,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:28,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:28,216 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:28,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-01-10 08:24:28,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:28,417 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:28,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:28,417 INFO L85 PathProgramCache]: Analyzing trace with hash -3416062, now seen corresponding path program 1 times [2022-01-10 08:24:28,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:28,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [522190217] [2022-01-10 08:24:28,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:28,418 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:28,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:28,419 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:28,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-01-10 08:24:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:28,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:24:28,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:28,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:28,738 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:28,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [522190217] [2022-01-10 08:24:28,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [522190217] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:28,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:28,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:28,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812449472] [2022-01-10 08:24:28,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:28,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:28,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:28,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:28,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:28,739 INFO L87 Difference]: Start difference. First operand 4661 states and 5855 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:29,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:29,300 INFO L93 Difference]: Finished difference Result 6648 states and 8258 transitions. [2022-01-10 08:24:29,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:24:29,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:29,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:29,310 INFO L225 Difference]: With dead ends: 6648 [2022-01-10 08:24:29,310 INFO L226 Difference]: Without dead ends: 4661 [2022-01-10 08:24:29,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:24:29,314 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 656 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:29,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 1106 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:24:29,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2022-01-10 08:24:29,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 4661. [2022-01-10 08:24:29,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4661 states, 4018 states have (on average 1.2471378795420607) internal successors, (5011), 4064 states have internal predecessors, (5011), 306 states have call successors, (306), 222 states have call predecessors, (306), 335 states have return successors, (531), 375 states have call predecessors, (531), 304 states have call successors, (531) [2022-01-10 08:24:29,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 5848 transitions. [2022-01-10 08:24:29,615 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 5848 transitions. Word has length 145 [2022-01-10 08:24:29,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:29,615 INFO L470 AbstractCegarLoop]: Abstraction has 4661 states and 5848 transitions. [2022-01-10 08:24:29,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:29,615 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 5848 transitions. [2022-01-10 08:24:29,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:29,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:29,619 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:29,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-01-10 08:24:29,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:29,821 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:29,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:29,822 INFO L85 PathProgramCache]: Analyzing trace with hash 271343552, now seen corresponding path program 1 times [2022-01-10 08:24:29,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:29,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045005653] [2022-01-10 08:24:29,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:29,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:29,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:29,823 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:29,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-01-10 08:24:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:29,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:24:29,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:30,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:30,149 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:30,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045005653] [2022-01-10 08:24:30,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045005653] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:30,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:30,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:30,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052397782] [2022-01-10 08:24:30,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:30,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:30,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:30,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:30,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:30,151 INFO L87 Difference]: Start difference. First operand 4661 states and 5848 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:30,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:30,834 INFO L93 Difference]: Finished difference Result 6862 states and 8530 transitions. [2022-01-10 08:24:30,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:24:30,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2022-01-10 08:24:30,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:30,844 INFO L225 Difference]: With dead ends: 6862 [2022-01-10 08:24:30,844 INFO L226 Difference]: Without dead ends: 4875 [2022-01-10 08:24:30,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:24:30,848 INFO L933 BasicCegarLoop]: 568 mSDtfsCounter, 760 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:30,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [788 Valid, 1136 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:24:30,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-01-10 08:24:31,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 4805. [2022-01-10 08:24:31,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4805 states, 4160 states have (on average 1.2379807692307692) internal successors, (5150), 4206 states have internal predecessors, (5150), 306 states have call successors, (306), 224 states have call predecessors, (306), 337 states have return successors, (531), 375 states have call predecessors, (531), 304 states have call successors, (531) [2022-01-10 08:24:31,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4805 states to 4805 states and 5987 transitions. [2022-01-10 08:24:31,141 INFO L78 Accepts]: Start accepts. Automaton has 4805 states and 5987 transitions. Word has length 145 [2022-01-10 08:24:31,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:31,141 INFO L470 AbstractCegarLoop]: Abstraction has 4805 states and 5987 transitions. [2022-01-10 08:24:31,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:31,141 INFO L276 IsEmpty]: Start isEmpty. Operand 4805 states and 5987 transitions. [2022-01-10 08:24:31,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 08:24:31,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:31,145 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:31,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:31,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:31,345 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:31,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:31,346 INFO L85 PathProgramCache]: Analyzing trace with hash 137330046, now seen corresponding path program 1 times [2022-01-10 08:24:31,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:31,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268910263] [2022-01-10 08:24:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:31,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:31,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:31,348 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:31,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-01-10 08:24:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:31,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:24:31,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:31,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:31,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:31,639 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:31,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268910263] [2022-01-10 08:24:31,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268910263] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:31,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:31,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:24:31,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433975317] [2022-01-10 08:24:31,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:31,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:24:31,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:31,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:24:31,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:31,640 INFO L87 Difference]: Start difference. First operand 4805 states and 5987 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 08:24:32,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:32,055 INFO L93 Difference]: Finished difference Result 9028 states and 11038 transitions. [2022-01-10 08:24:32,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:24:32,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 145 [2022-01-10 08:24:32,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:32,069 INFO L225 Difference]: With dead ends: 9028 [2022-01-10 08:24:32,069 INFO L226 Difference]: Without dead ends: 6898 [2022-01-10 08:24:32,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:32,075 INFO L933 BasicCegarLoop]: 630 mSDtfsCounter, 417 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:32,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 1005 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:32,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6898 states. [2022-01-10 08:24:32,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6898 to 6896. [2022-01-10 08:24:32,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6896 states, 6145 states have (on average 1.2195280716029293) internal successors, (7494), 6194 states have internal predecessors, (7494), 361 states have call successors, (361), 274 states have call predecessors, (361), 388 states have return successors, (587), 428 states have call predecessors, (587), 359 states have call successors, (587) [2022-01-10 08:24:32,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6896 states to 6896 states and 8442 transitions. [2022-01-10 08:24:32,515 INFO L78 Accepts]: Start accepts. Automaton has 6896 states and 8442 transitions. Word has length 145 [2022-01-10 08:24:32,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:32,515 INFO L470 AbstractCegarLoop]: Abstraction has 6896 states and 8442 transitions. [2022-01-10 08:24:32,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 08:24:32,516 INFO L276 IsEmpty]: Start isEmpty. Operand 6896 states and 8442 transitions. [2022-01-10 08:24:32,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-10 08:24:32,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:32,520 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:32,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:32,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:32,728 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:32,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:32,729 INFO L85 PathProgramCache]: Analyzing trace with hash 471680014, now seen corresponding path program 1 times [2022-01-10 08:24:32,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:32,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024729248] [2022-01-10 08:24:32,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:32,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:32,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:32,730 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:32,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-01-10 08:24:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:32,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:24:32,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-10 08:24:33,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:33,038 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:33,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024729248] [2022-01-10 08:24:33,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024729248] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:33,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:33,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:24:33,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814402299] [2022-01-10 08:24:33,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:33,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:24:33,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:33,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:24:33,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:33,039 INFO L87 Difference]: Start difference. First operand 6896 states and 8442 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 08:24:33,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:33,548 INFO L93 Difference]: Finished difference Result 11018 states and 13925 transitions. [2022-01-10 08:24:33,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:24:33,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 159 [2022-01-10 08:24:33,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:33,562 INFO L225 Difference]: With dead ends: 11018 [2022-01-10 08:24:33,563 INFO L226 Difference]: Without dead ends: 8680 [2022-01-10 08:24:33,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:33,569 INFO L933 BasicCegarLoop]: 596 mSDtfsCounter, 68 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:33,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 1145 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:33,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8680 states. [2022-01-10 08:24:34,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8680 to 8652. [2022-01-10 08:24:34,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8652 states, 7563 states have (on average 1.2327118868174005) internal successors, (9323), 7648 states have internal predecessors, (9323), 517 states have call successors, (517), 382 states have call predecessors, (517), 570 states have return successors, (896), 622 states have call predecessors, (896), 515 states have call successors, (896) [2022-01-10 08:24:34,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8652 states to 8652 states and 10736 transitions. [2022-01-10 08:24:34,191 INFO L78 Accepts]: Start accepts. Automaton has 8652 states and 10736 transitions. Word has length 159 [2022-01-10 08:24:34,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:34,192 INFO L470 AbstractCegarLoop]: Abstraction has 8652 states and 10736 transitions. [2022-01-10 08:24:34,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 08:24:34,193 INFO L276 IsEmpty]: Start isEmpty. Operand 8652 states and 10736 transitions. [2022-01-10 08:24:34,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-10 08:24:34,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:34,198 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:34,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-01-10 08:24:34,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:34,400 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:34,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:34,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1664907067, now seen corresponding path program 1 times [2022-01-10 08:24:34,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:34,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847812610] [2022-01-10 08:24:34,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:34,401 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:34,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:34,402 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:34,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-01-10 08:24:34,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:34,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:24:34,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 08:24:34,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:34,653 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:34,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847812610] [2022-01-10 08:24:34,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847812610] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:34,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:34,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:24:34,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918639681] [2022-01-10 08:24:34,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:34,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:24:34,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:34,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:24:34,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:34,655 INFO L87 Difference]: Start difference. First operand 8652 states and 10736 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 08:24:35,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:35,321 INFO L93 Difference]: Finished difference Result 16384 states and 21293 transitions. [2022-01-10 08:24:35,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:24:35,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 160 [2022-01-10 08:24:35,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:35,342 INFO L225 Difference]: With dead ends: 16384 [2022-01-10 08:24:35,342 INFO L226 Difference]: Without dead ends: 12290 [2022-01-10 08:24:35,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:35,350 INFO L933 BasicCegarLoop]: 641 mSDtfsCounter, 102 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:35,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 1194 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:35,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12290 states. [2022-01-10 08:24:36,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12290 to 12214. [2022-01-10 08:24:36,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12214 states, 10425 states have (on average 1.236546762589928) internal successors, (12891), 10560 states have internal predecessors, (12891), 853 states have call successors, (853), 616 states have call predecessors, (853), 934 states have return successors, (1694), 1038 states have call predecessors, (1694), 851 states have call successors, (1694) [2022-01-10 08:24:36,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12214 states to 12214 states and 15438 transitions. [2022-01-10 08:24:36,068 INFO L78 Accepts]: Start accepts. Automaton has 12214 states and 15438 transitions. Word has length 160 [2022-01-10 08:24:36,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:36,068 INFO L470 AbstractCegarLoop]: Abstraction has 12214 states and 15438 transitions. [2022-01-10 08:24:36,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 08:24:36,068 INFO L276 IsEmpty]: Start isEmpty. Operand 12214 states and 15438 transitions. [2022-01-10 08:24:36,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-10 08:24:36,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:36,075 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:36,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-01-10 08:24:36,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:36,276 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:36,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:36,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1390000276, now seen corresponding path program 1 times [2022-01-10 08:24:36,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:36,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21658677] [2022-01-10 08:24:36,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:36,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:36,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:36,278 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:36,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-01-10 08:24:36,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:36,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:24:36,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-10 08:24:36,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:36,564 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:36,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21658677] [2022-01-10 08:24:36,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21658677] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:36,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:36,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:24:36,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210196961] [2022-01-10 08:24:36,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:36,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:24:36,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:36,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:24:36,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:36,565 INFO L87 Difference]: Start difference. First operand 12214 states and 15438 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-01-10 08:24:37,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:37,671 INFO L93 Difference]: Finished difference Result 27384 states and 35653 transitions. [2022-01-10 08:24:37,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:24:37,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 161 [2022-01-10 08:24:37,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:37,710 INFO L225 Difference]: With dead ends: 27384 [2022-01-10 08:24:37,710 INFO L226 Difference]: Without dead ends: 19728 [2022-01-10 08:24:37,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:37,725 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 72 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:37,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1150 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:37,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19728 states. [2022-01-10 08:24:38,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19728 to 19724. [2022-01-10 08:24:38,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19724 states, 16458 states have (on average 1.2407947502734233) internal successors, (20421), 16722 states have internal predecessors, (20421), 1561 states have call successors, (1561), 1102 states have call predecessors, (1561), 1703 states have return successors, (3168), 1900 states have call predecessors, (3168), 1559 states have call successors, (3168) [2022-01-10 08:24:38,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19724 states to 19724 states and 25150 transitions. [2022-01-10 08:24:38,902 INFO L78 Accepts]: Start accepts. Automaton has 19724 states and 25150 transitions. Word has length 161 [2022-01-10 08:24:38,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:38,902 INFO L470 AbstractCegarLoop]: Abstraction has 19724 states and 25150 transitions. [2022-01-10 08:24:38,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-01-10 08:24:38,903 INFO L276 IsEmpty]: Start isEmpty. Operand 19724 states and 25150 transitions. [2022-01-10 08:24:38,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-10 08:24:38,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:38,915 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:38,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-01-10 08:24:39,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:39,115 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:39,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:39,116 INFO L85 PathProgramCache]: Analyzing trace with hash 986984691, now seen corresponding path program 1 times [2022-01-10 08:24:39,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:39,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925143155] [2022-01-10 08:24:39,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:39,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:39,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:39,117 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:39,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-01-10 08:24:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:39,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:39,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:39,387 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-01-10 08:24:39,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:39,387 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:39,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925143155] [2022-01-10 08:24:39,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925143155] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:39,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:39,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:39,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309001494] [2022-01-10 08:24:39,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:39,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:39,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:39,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:39,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:39,389 INFO L87 Difference]: Start difference. First operand 19724 states and 25150 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 08:24:41,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:41,715 INFO L93 Difference]: Finished difference Result 49277 states and 63804 transitions. [2022-01-10 08:24:41,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:24:41,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 166 [2022-01-10 08:24:41,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:41,856 INFO L225 Difference]: With dead ends: 49277 [2022-01-10 08:24:41,856 INFO L226 Difference]: Without dead ends: 33796 [2022-01-10 08:24:41,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-10 08:24:41,878 INFO L933 BasicCegarLoop]: 541 mSDtfsCounter, 792 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:41,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 1146 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:24:41,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33796 states. [2022-01-10 08:24:43,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33796 to 33620. [2022-01-10 08:24:43,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33620 states, 27448 states have (on average 1.242203439230545) internal successors, (34096), 27935 states have internal predecessors, (34096), 2956 states have call successors, (2956), 2053 states have call predecessors, (2956), 3214 states have return successors, (5962), 3632 states have call predecessors, (5962), 2954 states have call successors, (5962) [2022-01-10 08:24:43,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33620 states to 33620 states and 43014 transitions. [2022-01-10 08:24:43,886 INFO L78 Accepts]: Start accepts. Automaton has 33620 states and 43014 transitions. Word has length 166 [2022-01-10 08:24:43,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:43,886 INFO L470 AbstractCegarLoop]: Abstraction has 33620 states and 43014 transitions. [2022-01-10 08:24:43,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 08:24:43,886 INFO L276 IsEmpty]: Start isEmpty. Operand 33620 states and 43014 transitions. [2022-01-10 08:24:43,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-10 08:24:43,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:43,902 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:43,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:44,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:44,103 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:44,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:44,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1183217739, now seen corresponding path program 1 times [2022-01-10 08:24:44,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:44,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649485845] [2022-01-10 08:24:44,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:44,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:44,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:44,105 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:44,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-01-10 08:24:44,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:44,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:24:44,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:44,434 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-01-10 08:24:44,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:44,435 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:44,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649485845] [2022-01-10 08:24:44,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649485845] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:44,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:44,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:24:44,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954793368] [2022-01-10 08:24:44,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:44,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:24:44,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:44,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:24:44,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:44,436 INFO L87 Difference]: Start difference. First operand 33620 states and 43014 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 08:24:46,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:46,682 INFO L93 Difference]: Finished difference Result 62832 states and 80794 transitions. [2022-01-10 08:24:46,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:24:46,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) Word has length 185 [2022-01-10 08:24:46,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:46,766 INFO L225 Difference]: With dead ends: 62832 [2022-01-10 08:24:46,766 INFO L226 Difference]: Without dead ends: 33528 [2022-01-10 08:24:46,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:46,805 INFO L933 BasicCegarLoop]: 647 mSDtfsCounter, 115 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:46,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 1188 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:46,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33528 states. [2022-01-10 08:24:48,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33528 to 33524. [2022-01-10 08:24:48,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33524 states, 27352 states have (on average 1.2272594325826265) internal successors, (33568), 27887 states have internal predecessors, (33568), 2956 states have call successors, (2956), 2053 states have call predecessors, (2956), 3214 states have return successors, (5386), 3584 states have call predecessors, (5386), 2954 states have call successors, (5386) [2022-01-10 08:24:48,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33524 states to 33524 states and 41910 transitions. [2022-01-10 08:24:48,857 INFO L78 Accepts]: Start accepts. Automaton has 33524 states and 41910 transitions. Word has length 185 [2022-01-10 08:24:48,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:48,858 INFO L470 AbstractCegarLoop]: Abstraction has 33524 states and 41910 transitions. [2022-01-10 08:24:48,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 08:24:48,858 INFO L276 IsEmpty]: Start isEmpty. Operand 33524 states and 41910 transitions. [2022-01-10 08:24:48,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-10 08:24:48,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:48,861 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:48,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-01-10 08:24:49,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:49,062 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:49,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:49,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1902557997, now seen corresponding path program 1 times [2022-01-10 08:24:49,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:49,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18900260] [2022-01-10 08:24:49,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:49,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:49,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:49,064 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:49,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-01-10 08:24:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:49,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:24:49,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 08:24:49,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:49,351 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:49,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18900260] [2022-01-10 08:24:49,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18900260] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:49,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:49,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:24:49,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737760395] [2022-01-10 08:24:49,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:49,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:24:49,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:49,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:24:49,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:49,352 INFO L87 Difference]: Start difference. First operand 33524 states and 41910 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-01-10 08:24:51,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:51,407 INFO L93 Difference]: Finished difference Result 52988 states and 67486 transitions. [2022-01-10 08:24:51,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:24:51,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 191 [2022-01-10 08:24:51,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:51,424 INFO L225 Difference]: With dead ends: 52988 [2022-01-10 08:24:51,425 INFO L226 Difference]: Without dead ends: 4240 [2022-01-10 08:24:51,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:51,478 INFO L933 BasicCegarLoop]: 672 mSDtfsCounter, 88 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:51,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1216 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:51,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4240 states. [2022-01-10 08:24:51,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4240 to 4240. [2022-01-10 08:24:51,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4240 states, 4023 states have (on average 1.1886651752423565) internal successors, (4782), 4028 states have internal predecessors, (4782), 114 states have call successors, (114), 100 states have call predecessors, (114), 102 states have return successors, (116), 112 states have call predecessors, (116), 114 states have call successors, (116) [2022-01-10 08:24:51,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4240 states to 4240 states and 5012 transitions. [2022-01-10 08:24:51,778 INFO L78 Accepts]: Start accepts. Automaton has 4240 states and 5012 transitions. Word has length 191 [2022-01-10 08:24:51,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:51,779 INFO L470 AbstractCegarLoop]: Abstraction has 4240 states and 5012 transitions. [2022-01-10 08:24:51,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-01-10 08:24:51,779 INFO L276 IsEmpty]: Start isEmpty. Operand 4240 states and 5012 transitions. [2022-01-10 08:24:51,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-01-10 08:24:51,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:51,781 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:51,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-01-10 08:24:51,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:51,982 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:51,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:51,982 INFO L85 PathProgramCache]: Analyzing trace with hash -2035274005, now seen corresponding path program 1 times [2022-01-10 08:24:51,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:51,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479475568] [2022-01-10 08:24:51,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:51,983 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:51,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:51,984 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:51,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-01-10 08:24:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:52,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:24:52,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:52,562 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 08:24:52,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:52,562 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:52,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479475568] [2022-01-10 08:24:52,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [479475568] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:52,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:52,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:24:52,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824188683] [2022-01-10 08:24:52,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:52,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:24:52,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:52,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:24:52,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:52,563 INFO L87 Difference]: Start difference. First operand 4240 states and 5012 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 08:24:53,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:53,116 INFO L93 Difference]: Finished difference Result 12299 states and 14607 transitions. [2022-01-10 08:24:53,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:24:53,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 236 [2022-01-10 08:24:53,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:53,131 INFO L225 Difference]: With dead ends: 12299 [2022-01-10 08:24:53,131 INFO L226 Difference]: Without dead ends: 8078 [2022-01-10 08:24:53,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:53,140 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 254 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:53,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 849 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:53,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8078 states. [2022-01-10 08:24:53,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8078 to 8068. [2022-01-10 08:24:53,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8068 states, 7655 states have (on average 1.1832789026779882) internal successors, (9058), 7664 states have internal predecessors, (9058), 216 states have call successors, (216), 192 states have call predecessors, (216), 196 states have return successors, (220), 212 states have call predecessors, (220), 216 states have call successors, (220) [2022-01-10 08:24:53,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8068 states to 8068 states and 9494 transitions. [2022-01-10 08:24:53,844 INFO L78 Accepts]: Start accepts. Automaton has 8068 states and 9494 transitions. Word has length 236 [2022-01-10 08:24:53,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:53,844 INFO L470 AbstractCegarLoop]: Abstraction has 8068 states and 9494 transitions. [2022-01-10 08:24:53,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 08:24:53,844 INFO L276 IsEmpty]: Start isEmpty. Operand 8068 states and 9494 transitions. [2022-01-10 08:24:53,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-01-10 08:24:53,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:53,847 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:53,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-01-10 08:24:54,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:54,049 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:54,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:54,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1099785326, now seen corresponding path program 1 times [2022-01-10 08:24:54,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:54,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001487616] [2022-01-10 08:24:54,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:54,050 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:54,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:54,051 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:54,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-01-10 08:24:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:54,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:24:54,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-01-10 08:24:54,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:54,530 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:54,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001487616] [2022-01-10 08:24:54,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001487616] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:54,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:54,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:54,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811309132] [2022-01-10 08:24:54,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:54,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:24:54,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:54,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:24:54,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:24:54,531 INFO L87 Difference]: Start difference. First operand 8068 states and 9494 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:24:55,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:55,861 INFO L93 Difference]: Finished difference Result 23998 states and 28214 transitions. [2022-01-10 08:24:55,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:24:55,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 236 [2022-01-10 08:24:55,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:55,899 INFO L225 Difference]: With dead ends: 23998 [2022-01-10 08:24:55,900 INFO L226 Difference]: Without dead ends: 15950 [2022-01-10 08:24:55,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:55,918 INFO L933 BasicCegarLoop]: 595 mSDtfsCounter, 530 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:55,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 1306 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:24:55,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15950 states.