/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/systemc/kundu.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:40:57,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:40:57,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:40:57,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:40:57,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:40:57,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:40:57,091 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:40:57,092 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:40:57,093 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:40:57,094 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:40:57,094 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:40:57,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:40:57,095 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:40:57,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:40:57,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:40:57,097 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:40:57,098 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:40:57,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:40:57,099 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:40:57,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:40:57,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:40:57,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:40:57,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:40:57,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:40:57,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 06:40:57,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 06:40:57,105 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 06:40:57,106 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 06:40:57,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 06:40:57,106 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 06:40:57,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 06:40:57,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 06:40:57,108 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 06:40:57,108 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 06:40:57,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 06:40:57,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 06:40:57,109 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 06:40:57,109 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 06:40:57,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:40:57,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:40:57,110 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:40:57,111 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 06:40:57,126 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:40:57,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:40:57,126 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:40:57,126 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:40:57,127 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:40:57,127 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:40:57,128 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:40:57,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:40:57,129 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:40:57,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:40:57,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:40:57,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:40:57,129 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:40:57,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:40:57,129 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:40:57,130 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:40:57,130 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:40:57,130 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:40:57,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:40:57,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:40:57,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:40:57,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:40:57,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:40:57,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:40:57,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:40:57,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:40:57,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:40:57,131 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:40:57,131 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:40:57,131 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:40:57,131 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:40:57,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:40:57,132 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:40:57,132 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:40:57,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:40:57,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:40:57,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:40:57,381 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:40:57,382 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:40:57,383 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/kundu.cil.c [2022-01-10 06:40:57,450 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7254b3b0d/3dfa9edd48d945ab85d0176c372cda8d/FLAG75bc6574c [2022-01-10 06:40:57,778 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:40:57,778 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/kundu.cil.c [2022-01-10 06:40:57,806 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7254b3b0d/3dfa9edd48d945ab85d0176c372cda8d/FLAG75bc6574c [2022-01-10 06:40:58,185 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7254b3b0d/3dfa9edd48d945ab85d0176c372cda8d [2022-01-10 06:40:58,187 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:40:58,189 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:40:58,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:40:58,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:40:58,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:40:58,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:40:58" (1/1) ... [2022-01-10 06:40:58,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c25f237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:58, skipping insertion in model container [2022-01-10 06:40:58,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:40:58" (1/1) ... [2022-01-10 06:40:58,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:40:58,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:40:58,374 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/systemc/kundu.cil.c[635,648] [2022-01-10 06:40:58,435 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:40:58,448 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:40:58,455 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/systemc/kundu.cil.c[635,648] [2022-01-10 06:40:58,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:40:58,506 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:40:58,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:58 WrapperNode [2022-01-10 06:40:58,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:40:58,507 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:40:58,507 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:40:58,507 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:40:58,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:58" (1/1) ... [2022-01-10 06:40:58,531 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:58" (1/1) ... [2022-01-10 06:40:58,551 INFO L137 Inliner]: procedures = 34, calls = 40, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 304 [2022-01-10 06:40:58,552 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:40:58,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:40:58,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:40:58,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:40:58,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:58" (1/1) ... [2022-01-10 06:40:58,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:58" (1/1) ... [2022-01-10 06:40:58,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:58" (1/1) ... [2022-01-10 06:40:58,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:58" (1/1) ... [2022-01-10 06:40:58,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:58" (1/1) ... [2022-01-10 06:40:58,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:58" (1/1) ... [2022-01-10 06:40:58,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:58" (1/1) ... [2022-01-10 06:40:58,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:40:58,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:40:58,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:40:58,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:40:58,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:58" (1/1) ... [2022-01-10 06:40:58,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:40:58,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:40:58,621 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 06:40:58,626 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 06:40:58,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:40:58,647 INFO L130 BoogieDeclarations]: Found specification of procedure write_data [2022-01-10 06:40:58,647 INFO L138 BoogieDeclarations]: Found implementation of procedure write_data [2022-01-10 06:40:58,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:40:58,648 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-01-10 06:40:58,648 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-01-10 06:40:58,648 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-01-10 06:40:58,648 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-01-10 06:40:58,649 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-01-10 06:40:58,651 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-01-10 06:40:58,652 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-01-10 06:40:58,652 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-01-10 06:40:58,652 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-01-10 06:40:58,652 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-01-10 06:40:58,652 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-01-10 06:40:58,652 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-01-10 06:40:58,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:40:58,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:40:58,754 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:40:58,755 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:40:59,110 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:40:59,125 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:40:59,125 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-10 06:40:59,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:40:59 BoogieIcfgContainer [2022-01-10 06:40:59,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:40:59,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:40:59,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:40:59,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:40:59,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:40:58" (1/3) ... [2022-01-10 06:40:59,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e543664 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:40:59, skipping insertion in model container [2022-01-10 06:40:59,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:58" (2/3) ... [2022-01-10 06:40:59,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e543664 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:40:59, skipping insertion in model container [2022-01-10 06:40:59,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:40:59" (3/3) ... [2022-01-10 06:40:59,135 INFO L111 eAbstractionObserver]: Analyzing ICFG kundu.cil.c [2022-01-10 06:40:59,138 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:40:59,138 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:40:59,176 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:40:59,181 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 06:40:59,181 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:40:59,194 INFO L276 IsEmpty]: Start isEmpty. Operand has 135 states, 108 states have (on average 1.5185185185185186) internal successors, (164), 112 states have internal predecessors, (164), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-01-10 06:40:59,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 06:40:59,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:59,200 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] [2022-01-10 06:40:59,201 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:59,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:59,205 INFO L85 PathProgramCache]: Analyzing trace with hash -2012698059, now seen corresponding path program 1 times [2022-01-10 06:40:59,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:59,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821297116] [2022-01-10 06:40:59,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:40:59,217 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:59,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:59,219 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 06:40:59,220 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 06:40:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:40:59,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:40:59,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:59,418 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 06:40:59,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:40:59,419 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:59,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821297116] [2022-01-10 06:40:59,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821297116] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:40:59,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:40:59,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:40:59,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128331783] [2022-01-10 06:40:59,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:40:59,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:40:59,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:40:59,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:40:59,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:40:59,460 INFO L87 Difference]: Start difference. First operand has 135 states, 108 states have (on average 1.5185185185185186) internal successors, (164), 112 states have internal predecessors, (164), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:40:59,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:40:59,525 INFO L93 Difference]: Finished difference Result 261 states and 392 transitions. [2022-01-10 06:40:59,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:40:59,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2022-01-10 06:40:59,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:40:59,536 INFO L225 Difference]: With dead ends: 261 [2022-01-10 06:40:59,536 INFO L226 Difference]: Without dead ends: 128 [2022-01-10 06:40:59,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 57 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 06:40:59,542 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 179 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 185 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 06:40:59,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 185 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:40:59,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-10 06:40:59,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-01-10 06:40:59,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 103 states have (on average 1.4466019417475728) internal successors, (149), 106 states have internal predecessors, (149), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-10 06:40:59,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 182 transitions. [2022-01-10 06:40:59,578 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 182 transitions. Word has length 59 [2022-01-10 06:40:59,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:40:59,579 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 182 transitions. [2022-01-10 06:40:59,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:40:59,579 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 182 transitions. [2022-01-10 06:40:59,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 06:40:59,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:59,581 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] [2022-01-10 06:40:59,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 06:40:59,781 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 06:40:59,782 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:59,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:59,783 INFO L85 PathProgramCache]: Analyzing trace with hash 743929207, now seen corresponding path program 1 times [2022-01-10 06:40:59,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:59,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640601147] [2022-01-10 06:40:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:40:59,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:59,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:59,785 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 06:40:59,787 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 06:40:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:40:59,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:40:59,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:59,974 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 06:40:59,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:40:59,974 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:59,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640601147] [2022-01-10 06:40:59,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640601147] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:40:59,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:40:59,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:40:59,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836438010] [2022-01-10 06:40:59,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:40:59,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:40:59,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:40:59,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:40:59,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:40:59,977 INFO L87 Difference]: Start difference. First operand 128 states and 182 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:41:00,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:00,030 INFO L93 Difference]: Finished difference Result 359 states and 512 transitions. [2022-01-10 06:41:00,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:41:00,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2022-01-10 06:41:00,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:00,035 INFO L225 Difference]: With dead ends: 359 [2022-01-10 06:41:00,035 INFO L226 Difference]: Without dead ends: 242 [2022-01-10 06:41:00,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 57 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 06:41:00,037 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 159 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:00,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 382 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:00,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-10 06:41:00,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 236. [2022-01-10 06:41:00,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 194 states have (on average 1.443298969072165) internal successors, (280), 198 states have internal predecessors, (280), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-10 06:41:00,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 335 transitions. [2022-01-10 06:41:00,064 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 335 transitions. Word has length 59 [2022-01-10 06:41:00,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:00,064 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 335 transitions. [2022-01-10 06:41:00,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:41:00,065 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 335 transitions. [2022-01-10 06:41:00,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 06:41:00,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:00,066 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] [2022-01-10 06:41:00,073 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 06:41:00,269 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 06:41:00,270 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:00,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:00,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1652507784, now seen corresponding path program 1 times [2022-01-10 06:41:00,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:00,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990217110] [2022-01-10 06:41:00,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:00,271 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:00,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:00,279 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 06:41:00,311 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 06:41:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:00,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:41:00,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:00,470 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 06:41:00,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:00,471 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:00,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990217110] [2022-01-10 06:41:00,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [990217110] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:00,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:00,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:41:00,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510897176] [2022-01-10 06:41:00,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:00,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:41:00,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:00,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:41:00,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:41:00,478 INFO L87 Difference]: Start difference. First operand 236 states and 335 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:41:00,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:00,535 INFO L93 Difference]: Finished difference Result 500 states and 721 transitions. [2022-01-10 06:41:00,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:41:00,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2022-01-10 06:41:00,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:00,542 INFO L225 Difference]: With dead ends: 500 [2022-01-10 06:41:00,542 INFO L226 Difference]: Without dead ends: 275 [2022-01-10 06:41:00,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 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 06:41:00,549 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 106 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 787 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 06:41:00,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 787 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:00,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-01-10 06:41:00,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 239. [2022-01-10 06:41:00,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 197 states have (on average 1.4314720812182742) internal successors, (282), 201 states have internal predecessors, (282), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-10 06:41:00,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 337 transitions. [2022-01-10 06:41:00,578 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 337 transitions. Word has length 59 [2022-01-10 06:41:00,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:00,578 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 337 transitions. [2022-01-10 06:41:00,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:41:00,579 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 337 transitions. [2022-01-10 06:41:00,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 06:41:00,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:00,580 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] [2022-01-10 06:41:00,595 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 06:41:00,786 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 06:41:00,786 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:00,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:00,787 INFO L85 PathProgramCache]: Analyzing trace with hash 797092346, now seen corresponding path program 1 times [2022-01-10 06:41:00,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:00,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1241250126] [2022-01-10 06:41:00,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:00,788 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:00,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:00,789 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 06:41:00,810 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 06:41:00,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:00,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:41:00,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:41:00,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:00,986 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:00,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1241250126] [2022-01-10 06:41:00,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1241250126] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:00,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:00,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:41:00,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431740403] [2022-01-10 06:41:00,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:00,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:41:00,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:00,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:41:00,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:41:00,991 INFO L87 Difference]: Start difference. First operand 239 states and 337 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:41:01,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:01,029 INFO L93 Difference]: Finished difference Result 517 states and 747 transitions. [2022-01-10 06:41:01,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:41:01,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2022-01-10 06:41:01,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:01,032 INFO L225 Difference]: With dead ends: 517 [2022-01-10 06:41:01,033 INFO L226 Difference]: Without dead ends: 289 [2022-01-10 06:41:01,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 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 06:41:01,038 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 66 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 743 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 06:41:01,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 743 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:01,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-01-10 06:41:01,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 245. [2022-01-10 06:41:01,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 203 states have (on average 1.4187192118226601) internal successors, (288), 207 states have internal predecessors, (288), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-10 06:41:01,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 343 transitions. [2022-01-10 06:41:01,057 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 343 transitions. Word has length 59 [2022-01-10 06:41:01,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:01,057 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 343 transitions. [2022-01-10 06:41:01,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:41:01,058 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 343 transitions. [2022-01-10 06:41:01,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 06:41:01,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:01,059 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] [2022-01-10 06:41:01,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-01-10 06:41:01,265 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 06:41:01,266 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:01,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:01,266 INFO L85 PathProgramCache]: Analyzing trace with hash 724705788, now seen corresponding path program 1 times [2022-01-10 06:41:01,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:01,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542853547] [2022-01-10 06:41:01,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:01,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:01,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:01,268 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 06:41:01,270 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 06:41:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:01,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:41:01,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:01,468 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 06:41:01,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:01,469 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:01,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542853547] [2022-01-10 06:41:01,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542853547] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:01,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:01,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:41:01,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025821215] [2022-01-10 06:41:01,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:01,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:41:01,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:01,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:41:01,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:41:01,471 INFO L87 Difference]: Start difference. First operand 245 states and 343 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:41:01,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:01,509 INFO L93 Difference]: Finished difference Result 704 states and 986 transitions. [2022-01-10 06:41:01,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:41:01,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2022-01-10 06:41:01,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:01,511 INFO L225 Difference]: With dead ends: 704 [2022-01-10 06:41:01,511 INFO L226 Difference]: Without dead ends: 470 [2022-01-10 06:41:01,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 57 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 06:41:01,513 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 141 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 370 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 06:41:01,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 370 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:01,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-01-10 06:41:01,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 449. [2022-01-10 06:41:01,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 373 states have (on average 1.3914209115281502) internal successors, (519), 378 states have internal predecessors, (519), 51 states have call successors, (51), 25 states have call predecessors, (51), 24 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2022-01-10 06:41:01,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 618 transitions. [2022-01-10 06:41:01,531 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 618 transitions. Word has length 59 [2022-01-10 06:41:01,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:01,532 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 618 transitions. [2022-01-10 06:41:01,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:41:01,532 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 618 transitions. [2022-01-10 06:41:01,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-10 06:41:01,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:01,533 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] [2022-01-10 06:41:01,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-01-10 06:41:01,739 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 06:41:01,739 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:01,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:01,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1658073077, now seen corresponding path program 1 times [2022-01-10 06:41:01,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:01,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801316123] [2022-01-10 06:41:01,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:01,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:01,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:01,756 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 06:41:01,762 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 06:41:01,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:01,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:41:01,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:01,875 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 06:41:01,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:01,875 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:01,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801316123] [2022-01-10 06:41:01,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801316123] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:01,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:01,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:41:01,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98373480] [2022-01-10 06:41:01,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:01,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:41:01,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:01,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:41:01,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:41:01,877 INFO L87 Difference]: Start difference. First operand 449 states and 618 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:41:01,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:01,914 INFO L93 Difference]: Finished difference Result 901 states and 1257 transitions. [2022-01-10 06:41:01,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:41:01,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 60 [2022-01-10 06:41:01,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:01,917 INFO L225 Difference]: With dead ends: 901 [2022-01-10 06:41:01,917 INFO L226 Difference]: Without dead ends: 463 [2022-01-10 06:41:01,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 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 06:41:01,919 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 10 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:01,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 730 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:01,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-10 06:41:01,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 455. [2022-01-10 06:41:01,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 379 states have (on average 1.3799472295514512) internal successors, (523), 384 states have internal predecessors, (523), 51 states have call successors, (51), 25 states have call predecessors, (51), 24 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2022-01-10 06:41:01,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 622 transitions. [2022-01-10 06:41:01,935 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 622 transitions. Word has length 60 [2022-01-10 06:41:01,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:01,936 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 622 transitions. [2022-01-10 06:41:01,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:41:01,936 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 622 transitions. [2022-01-10 06:41:01,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-10 06:41:01,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:01,937 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] [2022-01-10 06:41:01,955 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 06:41:02,143 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 06:41:02,143 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:02,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:02,144 INFO L85 PathProgramCache]: Analyzing trace with hash -713666185, now seen corresponding path program 1 times [2022-01-10 06:41:02,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:02,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2094229397] [2022-01-10 06:41:02,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:02,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:02,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:02,146 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 06:41:02,147 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 06:41:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:02,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:41:02,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:02,300 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 06:41:02,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:02,300 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:02,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2094229397] [2022-01-10 06:41:02,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2094229397] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:02,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:02,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:41:02,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251816437] [2022-01-10 06:41:02,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:02,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:41:02,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:02,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:41:02,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:41:02,302 INFO L87 Difference]: Start difference. First operand 455 states and 622 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 06:41:02,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:02,374 INFO L93 Difference]: Finished difference Result 1312 states and 1796 transitions. [2022-01-10 06:41:02,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:41:02,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 60 [2022-01-10 06:41:02,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:02,380 INFO L225 Difference]: With dead ends: 1312 [2022-01-10 06:41:02,384 INFO L226 Difference]: Without dead ends: 869 [2022-01-10 06:41:02,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 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 06:41:02,386 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 106 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:02,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 731 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:02,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-01-10 06:41:02,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 853. [2022-01-10 06:41:02,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 713 states have (on average 1.3730715287517532) internal successors, (979), 726 states have internal predecessors, (979), 91 states have call successors, (91), 49 states have call predecessors, (91), 48 states have return successors, (88), 78 states have call predecessors, (88), 88 states have call successors, (88) [2022-01-10 06:41:02,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1158 transitions. [2022-01-10 06:41:02,426 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1158 transitions. Word has length 60 [2022-01-10 06:41:02,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:02,427 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 1158 transitions. [2022-01-10 06:41:02,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 06:41:02,427 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1158 transitions. [2022-01-10 06:41:02,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-10 06:41:02,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:02,428 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:41:02,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-01-10 06:41:02,635 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 06:41:02,635 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:02,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:02,636 INFO L85 PathProgramCache]: Analyzing trace with hash 196410881, now seen corresponding path program 1 times [2022-01-10 06:41:02,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:02,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [458618262] [2022-01-10 06:41:02,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:02,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:02,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:02,638 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 06:41:02,640 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 06:41:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:02,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:41:02,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:41:02,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:41:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:41:02,950 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:02,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [458618262] [2022-01-10 06:41:02,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [458618262] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 06:41:02,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:41:02,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2022-01-10 06:41:02,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778196730] [2022-01-10 06:41:02,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:02,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:41:02,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:02,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:41:02,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:41:02,951 INFO L87 Difference]: Start difference. First operand 853 states and 1158 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 06:41:03,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:03,117 INFO L93 Difference]: Finished difference Result 2562 states and 3491 transitions. [2022-01-10 06:41:03,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:41:03,117 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 71 [2022-01-10 06:41:03,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:03,123 INFO L225 Difference]: With dead ends: 2562 [2022-01-10 06:41:03,123 INFO L226 Difference]: Without dead ends: 1721 [2022-01-10 06:41:03,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:41:03,125 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 293 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 1337 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:03,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 1337 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:41:03,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-01-10 06:41:03,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1691. [2022-01-10 06:41:03,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1419 states have (on average 1.3706835799859056) internal successors, (1945), 1442 states have internal predecessors, (1945), 175 states have call successors, (175), 97 states have call predecessors, (175), 96 states have return successors, (172), 152 states have call predecessors, (172), 172 states have call successors, (172) [2022-01-10 06:41:03,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 2292 transitions. [2022-01-10 06:41:03,178 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 2292 transitions. Word has length 71 [2022-01-10 06:41:03,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:03,178 INFO L470 AbstractCegarLoop]: Abstraction has 1691 states and 2292 transitions. [2022-01-10 06:41:03,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 06:41:03,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 2292 transitions. [2022-01-10 06:41:03,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-10 06:41:03,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:03,179 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] [2022-01-10 06:41:03,225 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 06:41:03,384 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 06:41:03,386 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:03,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:03,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1507770521, now seen corresponding path program 1 times [2022-01-10 06:41:03,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:03,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2120094355] [2022-01-10 06:41:03,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:03,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:03,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:03,388 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 06:41:03,389 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 06:41:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:03,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:41:03,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:03,645 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 06:41:03,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:03,645 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:03,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2120094355] [2022-01-10 06:41:03,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2120094355] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:03,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:03,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:41:03,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903352429] [2022-01-10 06:41:03,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:03,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:41:03,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:03,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:41:03,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:41:03,647 INFO L87 Difference]: Start difference. First operand 1691 states and 2292 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 06:41:03,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:03,912 INFO L93 Difference]: Finished difference Result 5086 states and 6930 transitions. [2022-01-10 06:41:03,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:41:03,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 74 [2022-01-10 06:41:03,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:03,947 INFO L225 Difference]: With dead ends: 5086 [2022-01-10 06:41:03,947 INFO L226 Difference]: Without dead ends: 3407 [2022-01-10 06:41:03,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 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 06:41:03,968 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 177 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:03,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 555 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:41:03,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2022-01-10 06:41:04,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 3340. [2022-01-10 06:41:04,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3340 states, 2825 states have (on average 1.3408849557522124) internal successors, (3788), 2869 states have internal predecessors, (3788), 314 states have call successors, (314), 185 states have call predecessors, (314), 200 states have return successors, (400), 287 states have call predecessors, (400), 311 states have call successors, (400) [2022-01-10 06:41:04,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3340 states to 3340 states and 4502 transitions. [2022-01-10 06:41:04,160 INFO L78 Accepts]: Start accepts. Automaton has 3340 states and 4502 transitions. Word has length 74 [2022-01-10 06:41:04,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:04,173 INFO L470 AbstractCegarLoop]: Abstraction has 3340 states and 4502 transitions. [2022-01-10 06:41:04,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 06:41:04,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3340 states and 4502 transitions. [2022-01-10 06:41:04,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-10 06:41:04,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:04,178 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] [2022-01-10 06:41:04,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-01-10 06:41:04,387 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 06:41:04,388 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:04,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:04,388 INFO L85 PathProgramCache]: Analyzing trace with hash 775803095, now seen corresponding path program 1 times [2022-01-10 06:41:04,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:04,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1168037435] [2022-01-10 06:41:04,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:04,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:04,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:04,390 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 06:41:04,391 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 06:41:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:04,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:41:04,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:04,521 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 06:41:04,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:04,522 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:04,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1168037435] [2022-01-10 06:41:04,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1168037435] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:04,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:04,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:41:04,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377473277] [2022-01-10 06:41:04,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:04,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:41:04,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:04,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:41:04,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:41:04,523 INFO L87 Difference]: Start difference. First operand 3340 states and 4502 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 06:41:04,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:04,612 INFO L93 Difference]: Finished difference Result 6664 states and 8978 transitions. [2022-01-10 06:41:04,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:41:04,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 74 [2022-01-10 06:41:04,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:04,648 INFO L225 Difference]: With dead ends: 6664 [2022-01-10 06:41:04,648 INFO L226 Difference]: Without dead ends: 3335 [2022-01-10 06:41:04,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 72 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 06:41:04,654 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 173 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 180 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 06:41:04,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 180 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:04,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2022-01-10 06:41:04,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 3335. [2022-01-10 06:41:04,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3335 states, 2823 states have (on average 1.3404179950407369) internal successors, (3784), 2866 states have internal predecessors, (3784), 311 states have call successors, (311), 185 states have call predecessors, (311), 200 states have return successors, (396), 284 states have call predecessors, (396), 308 states have call successors, (396) [2022-01-10 06:41:04,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3335 states to 3335 states and 4491 transitions. [2022-01-10 06:41:04,751 INFO L78 Accepts]: Start accepts. Automaton has 3335 states and 4491 transitions. Word has length 74 [2022-01-10 06:41:04,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:04,751 INFO L470 AbstractCegarLoop]: Abstraction has 3335 states and 4491 transitions. [2022-01-10 06:41:04,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 06:41:04,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3335 states and 4491 transitions. [2022-01-10 06:41:04,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-10 06:41:04,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:04,752 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] [2022-01-10 06:41:04,773 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 06:41:04,959 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 06:41:04,959 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:04,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:04,960 INFO L85 PathProgramCache]: Analyzing trace with hash 71967124, now seen corresponding path program 1 times [2022-01-10 06:41:04,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:04,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284414321] [2022-01-10 06:41:04,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:04,960 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:04,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:04,961 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 06:41:04,978 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 06:41:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:05,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:41:05,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:05,164 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 06:41:05,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:05,165 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:05,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284414321] [2022-01-10 06:41:05,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1284414321] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:05,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:05,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:41:05,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317625310] [2022-01-10 06:41:05,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:05,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:41:05,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:05,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:41:05,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:41:05,166 INFO L87 Difference]: Start difference. First operand 3335 states and 4491 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 06:41:05,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:05,508 INFO L93 Difference]: Finished difference Result 7944 states and 10992 transitions. [2022-01-10 06:41:05,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:41:05,508 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 75 [2022-01-10 06:41:05,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:05,529 INFO L225 Difference]: With dead ends: 7944 [2022-01-10 06:41:05,529 INFO L226 Difference]: Without dead ends: 4621 [2022-01-10 06:41:05,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 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 06:41:05,538 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 398 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 1462 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:05,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 1462 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:41:05,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4621 states. [2022-01-10 06:41:05,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4621 to 3331. [2022-01-10 06:41:05,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3331 states, 2819 states have (on average 1.338063142958496) internal successors, (3772), 2862 states have internal predecessors, (3772), 311 states have call successors, (311), 185 states have call predecessors, (311), 200 states have return successors, (396), 284 states have call predecessors, (396), 308 states have call successors, (396) [2022-01-10 06:41:05,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3331 states to 3331 states and 4479 transitions. [2022-01-10 06:41:05,676 INFO L78 Accepts]: Start accepts. Automaton has 3331 states and 4479 transitions. Word has length 75 [2022-01-10 06:41:05,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:05,677 INFO L470 AbstractCegarLoop]: Abstraction has 3331 states and 4479 transitions. [2022-01-10 06:41:05,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 06:41:05,677 INFO L276 IsEmpty]: Start isEmpty. Operand 3331 states and 4479 transitions. [2022-01-10 06:41:05,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 06:41:05,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:05,678 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 06:41:05,686 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 06:41:05,885 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 06:41:05,885 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:05,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:05,885 INFO L85 PathProgramCache]: Analyzing trace with hash -494723516, now seen corresponding path program 1 times [2022-01-10 06:41:05,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:05,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [114466708] [2022-01-10 06:41:05,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:05,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:05,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:05,887 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 06:41:05,925 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 06:41:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:05,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:41:05,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:06,064 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:41:06,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:06,064 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:06,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [114466708] [2022-01-10 06:41:06,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [114466708] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:06,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:06,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:41:06,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730940725] [2022-01-10 06:41:06,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:06,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:41:06,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:06,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:41:06,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:41:06,066 INFO L87 Difference]: Start difference. First operand 3331 states and 4479 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-10 06:41:06,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:06,367 INFO L93 Difference]: Finished difference Result 10111 states and 13725 transitions. [2022-01-10 06:41:06,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:41:06,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 79 [2022-01-10 06:41:06,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:06,394 INFO L225 Difference]: With dead ends: 10111 [2022-01-10 06:41:06,395 INFO L226 Difference]: Without dead ends: 6792 [2022-01-10 06:41:06,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 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 06:41:06,406 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 208 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:06,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 441 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:41:06,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6792 states. [2022-01-10 06:41:06,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6792 to 6787. [2022-01-10 06:41:06,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6787 states, 5779 states have (on average 1.313722097248659) internal successors, (7592), 5870 states have internal predecessors, (7592), 591 states have call successors, (591), 361 states have call predecessors, (591), 416 states have return successors, (868), 556 states have call predecessors, (868), 588 states have call successors, (868) [2022-01-10 06:41:06,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6787 states to 6787 states and 9051 transitions. [2022-01-10 06:41:06,667 INFO L78 Accepts]: Start accepts. Automaton has 6787 states and 9051 transitions. Word has length 79 [2022-01-10 06:41:06,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:06,667 INFO L470 AbstractCegarLoop]: Abstraction has 6787 states and 9051 transitions. [2022-01-10 06:41:06,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-10 06:41:06,668 INFO L276 IsEmpty]: Start isEmpty. Operand 6787 states and 9051 transitions. [2022-01-10 06:41:06,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 06:41:06,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:06,669 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 06:41:06,677 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 06:41:06,876 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 06:41:06,876 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:06,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:06,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1561710612, now seen corresponding path program 1 times [2022-01-10 06:41:06,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:06,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236104816] [2022-01-10 06:41:06,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:06,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:06,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:06,878 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 06:41:06,919 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 06:41:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:06,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:41:06,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:41:07,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:07,034 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:07,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236104816] [2022-01-10 06:41:07,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236104816] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:07,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:07,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:41:07,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722070140] [2022-01-10 06:41:07,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:07,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:41:07,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:07,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:41:07,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:41:07,035 INFO L87 Difference]: Start difference. First operand 6787 states and 9051 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 06:41:07,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:07,398 INFO L93 Difference]: Finished difference Result 18663 states and 25036 transitions. [2022-01-10 06:41:07,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:41:07,398 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 81 [2022-01-10 06:41:07,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:07,454 INFO L225 Difference]: With dead ends: 18663 [2022-01-10 06:41:07,455 INFO L226 Difference]: Without dead ends: 11888 [2022-01-10 06:41:07,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 79 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 06:41:07,472 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 129 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:07,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 484 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:07,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11888 states. [2022-01-10 06:41:07,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11888 to 11885. [2022-01-10 06:41:07,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11885 states, 10061 states have (on average 1.3010635125733028) internal successors, (13090), 10221 states have internal predecessors, (13090), 1070 states have call successors, (1070), 654 states have call predecessors, (1070), 753 states have return successors, (1712), 1011 states have call predecessors, (1712), 1067 states have call successors, (1712) [2022-01-10 06:41:07,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11885 states to 11885 states and 15872 transitions. [2022-01-10 06:41:07,935 INFO L78 Accepts]: Start accepts. Automaton has 11885 states and 15872 transitions. Word has length 81 [2022-01-10 06:41:07,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:07,935 INFO L470 AbstractCegarLoop]: Abstraction has 11885 states and 15872 transitions. [2022-01-10 06:41:07,936 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 06:41:07,936 INFO L276 IsEmpty]: Start isEmpty. Operand 11885 states and 15872 transitions. [2022-01-10 06:41:07,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-10 06:41:07,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:07,939 INFO L514 BasicCegarLoop]: trace histogram [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 06:41:07,946 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 06:41:08,146 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 06:41:08,146 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:08,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:08,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1645371471, now seen corresponding path program 1 times [2022-01-10 06:41:08,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:08,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034736646] [2022-01-10 06:41:08,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:08,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:08,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:08,148 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 06:41:08,149 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 06:41:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:08,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:41:08,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:08,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:41:08,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:41:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:41:08,560 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:08,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034736646] [2022-01-10 06:41:08,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034736646] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 06:41:08,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:41:08,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-01-10 06:41:08,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96760147] [2022-01-10 06:41:08,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:08,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:41:08,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:08,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:41:08,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:41:08,562 INFO L87 Difference]: Start difference. First operand 11885 states and 15872 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 06:41:09,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:09,842 INFO L93 Difference]: Finished difference Result 32714 states and 43908 transitions. [2022-01-10 06:41:09,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:41:09,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 84 [2022-01-10 06:41:09,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:09,909 INFO L225 Difference]: With dead ends: 32714 [2022-01-10 06:41:09,909 INFO L226 Difference]: Without dead ends: 22724 [2022-01-10 06:41:09,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:41:09,937 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 771 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:09,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [771 Valid, 813 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:41:09,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22724 states. [2022-01-10 06:41:10,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22724 to 20145. [2022-01-10 06:41:10,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20145 states, 17143 states have (on average 1.3128390596745028) internal successors, (22506), 17371 states have internal predecessors, (22506), 1758 states have call successors, (1758), 1074 states have call predecessors, (1758), 1243 states have return successors, (2890), 1701 states have call predecessors, (2890), 1755 states have call successors, (2890) [2022-01-10 06:41:10,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20145 states to 20145 states and 27154 transitions. [2022-01-10 06:41:10,806 INFO L78 Accepts]: Start accepts. Automaton has 20145 states and 27154 transitions. Word has length 84 [2022-01-10 06:41:10,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:10,806 INFO L470 AbstractCegarLoop]: Abstraction has 20145 states and 27154 transitions. [2022-01-10 06:41:10,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 06:41:10,806 INFO L276 IsEmpty]: Start isEmpty. Operand 20145 states and 27154 transitions. [2022-01-10 06:41:10,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-10 06:41:10,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:10,810 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 06:41:10,829 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 06:41:11,019 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 06:41:11,019 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:11,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:11,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1168082145, now seen corresponding path program 1 times [2022-01-10 06:41:11,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:11,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330095676] [2022-01-10 06:41:11,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:11,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:11,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:11,021 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 06:41:11,067 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 06:41:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:11,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:41:11,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:41:11,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:41:11,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:41:11,400 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:11,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330095676] [2022-01-10 06:41:11,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330095676] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 06:41:11,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:41:11,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2022-01-10 06:41:11,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674721936] [2022-01-10 06:41:11,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:11,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:41:11,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:11,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:41:11,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:41:11,402 INFO L87 Difference]: Start difference. First operand 20145 states and 27154 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 06:41:13,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:13,005 INFO L93 Difference]: Finished difference Result 57583 states and 80735 transitions. [2022-01-10 06:41:13,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:41:13,006 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2022-01-10 06:41:13,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:13,161 INFO L225 Difference]: With dead ends: 57583 [2022-01-10 06:41:13,161 INFO L226 Difference]: Without dead ends: 40074 [2022-01-10 06:41:13,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 164 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:41:13,212 INFO L933 BasicCegarLoop]: 753 mSDtfsCounter, 620 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 2626 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:13,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 2626 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:41:13,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40074 states. [2022-01-10 06:41:14,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40074 to 26969. [2022-01-10 06:41:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26969 states, 23015 states have (on average 1.3209645883119705) internal successors, (30402), 23303 states have internal predecessors, (30402), 2314 states have call successors, (2314), 1414 states have call predecessors, (2314), 1639 states have return successors, (3866), 2253 states have call predecessors, (3866), 2311 states have call successors, (3866) [2022-01-10 06:41:14,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26969 states to 26969 states and 36582 transitions. [2022-01-10 06:41:14,438 INFO L78 Accepts]: Start accepts. Automaton has 26969 states and 36582 transitions. Word has length 87 [2022-01-10 06:41:14,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:14,439 INFO L470 AbstractCegarLoop]: Abstraction has 26969 states and 36582 transitions. [2022-01-10 06:41:14,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 06:41:14,439 INFO L276 IsEmpty]: Start isEmpty. Operand 26969 states and 36582 transitions. [2022-01-10 06:41:14,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-10 06:41:14,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:14,443 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 06:41:14,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-01-10 06:41:14,649 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 06:41:14,650 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:14,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:14,650 INFO L85 PathProgramCache]: Analyzing trace with hash 390646643, now seen corresponding path program 1 times [2022-01-10 06:41:14,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:14,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057968460] [2022-01-10 06:41:14,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:14,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:14,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:14,651 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 06:41:14,653 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 06:41:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:14,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:41:14,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:41:14,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:14,823 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:14,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057968460] [2022-01-10 06:41:14,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057968460] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:14,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:14,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:41:14,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554574605] [2022-01-10 06:41:14,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:14,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:41:14,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:14,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:41:14,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:41:14,824 INFO L87 Difference]: Start difference. First operand 26969 states and 36582 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 06:41:16,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:16,240 INFO L93 Difference]: Finished difference Result 54145 states and 73377 transitions. [2022-01-10 06:41:16,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:41:16,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 94 [2022-01-10 06:41:16,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:16,316 INFO L225 Difference]: With dead ends: 54145 [2022-01-10 06:41:16,316 INFO L226 Difference]: Without dead ends: 27192 [2022-01-10 06:41:16,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 92 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 06:41:16,350 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 126 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 469 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 06:41:16,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 469 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:16,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27192 states. [2022-01-10 06:41:17,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27192 to 27058. [2022-01-10 06:41:17,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27058 states, 23103 states have (on average 1.3097866077998528) internal successors, (30260), 23369 states have internal predecessors, (30260), 2292 states have call successors, (2292), 1437 states have call predecessors, (2292), 1662 states have return successors, (3454), 2253 states have call predecessors, (3454), 2289 states have call successors, (3454) [2022-01-10 06:41:17,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27058 states to 27058 states and 36006 transitions. [2022-01-10 06:41:17,396 INFO L78 Accepts]: Start accepts. Automaton has 27058 states and 36006 transitions. Word has length 94 [2022-01-10 06:41:17,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:17,397 INFO L470 AbstractCegarLoop]: Abstraction has 27058 states and 36006 transitions. [2022-01-10 06:41:17,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 06:41:17,397 INFO L276 IsEmpty]: Start isEmpty. Operand 27058 states and 36006 transitions. [2022-01-10 06:41:17,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-10 06:41:17,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:17,406 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 06:41:17,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-01-10 06:41:17,613 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 06:41:17,613 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:17,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:17,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1050949112, now seen corresponding path program 1 times [2022-01-10 06:41:17,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:17,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967796670] [2022-01-10 06:41:17,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:17,614 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:17,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:17,622 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 06:41:17,647 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 06:41:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:17,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:41:17,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:17,878 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 06:41:17,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:41:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 06:41:18,026 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:18,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967796670] [2022-01-10 06:41:18,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967796670] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:41:18,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:41:18,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-01-10 06:41:18,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874217099] [2022-01-10 06:41:18,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:41:18,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:41:18,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:18,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:41:18,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:41:18,028 INFO L87 Difference]: Start difference. First operand 27058 states and 36006 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-01-10 06:41:19,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:19,368 INFO L93 Difference]: Finished difference Result 51628 states and 68828 transitions. [2022-01-10 06:41:19,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:41:19,369 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 96 [2022-01-10 06:41:19,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:19,452 INFO L225 Difference]: With dead ends: 51628 [2022-01-10 06:41:19,452 INFO L226 Difference]: Without dead ends: 27218 [2022-01-10 06:41:19,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:41:19,503 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 230 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:19,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 1279 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:41:19,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27218 states. [2022-01-10 06:41:20,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27218 to 25126. [2022-01-10 06:41:20,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25126 states, 21459 states have (on average 1.3095204809170977) internal successors, (28101), 21689 states have internal predecessors, (28101), 2130 states have call successors, (2130), 1329 states have call predecessors, (2130), 1536 states have return successors, (3214), 2109 states have call predecessors, (3214), 2127 states have call successors, (3214) [2022-01-10 06:41:20,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25126 states to 25126 states and 33445 transitions. [2022-01-10 06:41:20,655 INFO L78 Accepts]: Start accepts. Automaton has 25126 states and 33445 transitions. Word has length 96 [2022-01-10 06:41:20,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:20,655 INFO L470 AbstractCegarLoop]: Abstraction has 25126 states and 33445 transitions. [2022-01-10 06:41:20,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-01-10 06:41:20,656 INFO L276 IsEmpty]: Start isEmpty. Operand 25126 states and 33445 transitions. [2022-01-10 06:41:20,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-10 06:41:20,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:20,660 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:41:20,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-01-10 06:41:20,866 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 06:41:20,867 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:20,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:20,867 INFO L85 PathProgramCache]: Analyzing trace with hash -536746609, now seen corresponding path program 1 times [2022-01-10 06:41:20,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:20,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535604710] [2022-01-10 06:41:20,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:20,868 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:20,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:20,869 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 06:41:20,870 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 06:41:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:20,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:41:20,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:21,069 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:41:21,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:21,070 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:21,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535604710] [2022-01-10 06:41:21,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535604710] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:21,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:21,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:41:21,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867738786] [2022-01-10 06:41:21,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:21,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:41:21,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:21,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:41:21,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:41:21,071 INFO L87 Difference]: Start difference. First operand 25126 states and 33445 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:41:22,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:22,176 INFO L93 Difference]: Finished difference Result 50575 states and 67123 transitions. [2022-01-10 06:41:22,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:41:22,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 97 [2022-01-10 06:41:22,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:22,247 INFO L225 Difference]: With dead ends: 50575 [2022-01-10 06:41:22,248 INFO L226 Difference]: Without dead ends: 25465 [2022-01-10 06:41:22,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 95 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 06:41:22,287 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 155 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:22,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 422 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:41:22,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25465 states. [2022-01-10 06:41:23,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25465 to 25462. [2022-01-10 06:41:23,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25462 states, 21627 states have (on average 1.3003190456373976) internal successors, (28122), 22025 states have internal predecessors, (28122), 2130 states have call successors, (2130), 1329 states have call predecessors, (2130), 1704 states have return successors, (3214), 2109 states have call predecessors, (3214), 2127 states have call successors, (3214) [2022-01-10 06:41:23,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25462 states to 25462 states and 33466 transitions. [2022-01-10 06:41:23,469 INFO L78 Accepts]: Start accepts. Automaton has 25462 states and 33466 transitions. Word has length 97 [2022-01-10 06:41:23,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:23,469 INFO L470 AbstractCegarLoop]: Abstraction has 25462 states and 33466 transitions. [2022-01-10 06:41:23,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:41:23,469 INFO L276 IsEmpty]: Start isEmpty. Operand 25462 states and 33466 transitions. [2022-01-10 06:41:23,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-10 06:41:23,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:23,474 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:41:23,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-01-10 06:41:23,681 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 06:41:23,681 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:23,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:23,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1531440307, now seen corresponding path program 1 times [2022-01-10 06:41:23,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:23,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975220649] [2022-01-10 06:41:23,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:23,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:23,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:23,694 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 06:41:23,696 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 06:41:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:23,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:41:23,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-10 06:41:23,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:23,870 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:23,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975220649] [2022-01-10 06:41:23,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975220649] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:23,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:23,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:41:23,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859536495] [2022-01-10 06:41:23,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:23,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:41:23,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:23,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:41:23,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:41:23,873 INFO L87 Difference]: Start difference. First operand 25462 states and 33466 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 06:41:24,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:24,742 INFO L93 Difference]: Finished difference Result 27316 states and 35761 transitions. [2022-01-10 06:41:24,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:41:24,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 97 [2022-01-10 06:41:24,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:24,816 INFO L225 Difference]: With dead ends: 27316 [2022-01-10 06:41:24,816 INFO L226 Difference]: Without dead ends: 25458 [2022-01-10 06:41:24,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 95 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 06:41:24,831 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 171 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 179 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 06:41:24,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 179 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:24,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25458 states. [2022-01-10 06:41:25,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25458 to 24937. [2022-01-10 06:41:25,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24937 states, 21189 states have (on average 1.3006748784746802) internal successors, (27560), 21580 states have internal predecessors, (27560), 2079 states have call successors, (2079), 1299 states have call predecessors, (2079), 1668 states have return successors, (3151), 2058 states have call predecessors, (3151), 2076 states have call successors, (3151) [2022-01-10 06:41:25,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24937 states to 24937 states and 32790 transitions. [2022-01-10 06:41:25,865 INFO L78 Accepts]: Start accepts. Automaton has 24937 states and 32790 transitions. Word has length 97 [2022-01-10 06:41:25,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:25,865 INFO L470 AbstractCegarLoop]: Abstraction has 24937 states and 32790 transitions. [2022-01-10 06:41:25,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 06:41:25,865 INFO L276 IsEmpty]: Start isEmpty. Operand 24937 states and 32790 transitions. [2022-01-10 06:41:25,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-10 06:41:25,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:25,869 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:41:25,889 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 06:41:26,076 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 06:41:26,076 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:26,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:26,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1743423476, now seen corresponding path program 1 times [2022-01-10 06:41:26,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:26,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384891313] [2022-01-10 06:41:26,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:26,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:26,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:26,078 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 06:41:26,079 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 06:41:26,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:26,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:41:26,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:41:26,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:26,266 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:26,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384891313] [2022-01-10 06:41:26,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384891313] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:26,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:26,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:41:26,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541677866] [2022-01-10 06:41:26,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:26,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:41:26,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:26,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:41:26,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:41:26,267 INFO L87 Difference]: Start difference. First operand 24937 states and 32790 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:41:27,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:27,284 INFO L93 Difference]: Finished difference Result 52309 states and 68540 transitions. [2022-01-10 06:41:27,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:41:27,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 98 [2022-01-10 06:41:27,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:27,347 INFO L225 Difference]: With dead ends: 52309 [2022-01-10 06:41:27,347 INFO L226 Difference]: Without dead ends: 27384 [2022-01-10 06:41:27,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 96 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 06:41:27,385 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 130 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:27,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 469 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:27,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27384 states. [2022-01-10 06:41:28,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27384 to 27379. [2022-01-10 06:41:28,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27379 states, 23519 states have (on average 1.2906586164377738) internal successors, (30355), 23956 states have internal predecessors, (30355), 2079 states have call successors, (2079), 1365 states have call predecessors, (2079), 1780 states have return successors, (2974), 2058 states have call predecessors, (2974), 2076 states have call successors, (2974) [2022-01-10 06:41:28,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27379 states to 27379 states and 35408 transitions. [2022-01-10 06:41:28,531 INFO L78 Accepts]: Start accepts. Automaton has 27379 states and 35408 transitions. Word has length 98 [2022-01-10 06:41:28,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:28,532 INFO L470 AbstractCegarLoop]: Abstraction has 27379 states and 35408 transitions. [2022-01-10 06:41:28,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:41:28,532 INFO L276 IsEmpty]: Start isEmpty. Operand 27379 states and 35408 transitions. [2022-01-10 06:41:28,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-10 06:41:28,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:28,538 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 06:41:28,555 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 06:41:28,744 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 06:41:28,744 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:28,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:28,745 INFO L85 PathProgramCache]: Analyzing trace with hash 148957247, now seen corresponding path program 1 times [2022-01-10 06:41:28,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:28,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035625] [2022-01-10 06:41:28,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:28,745 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:28,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:28,746 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 06:41:28,747 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 06:41:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:28,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:41:28,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:28,965 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:41:28,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:28,965 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:28,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035625] [2022-01-10 06:41:28,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1035625] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:28,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:28,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:41:28,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849126343] [2022-01-10 06:41:28,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:28,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:41:28,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:28,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:41:28,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:41:28,967 INFO L87 Difference]: Start difference. First operand 27379 states and 35408 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:41:30,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:30,606 INFO L93 Difference]: Finished difference Result 71756 states and 93090 transitions. [2022-01-10 06:41:30,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:41:30,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 119 [2022-01-10 06:41:30,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:30,715 INFO L225 Difference]: With dead ends: 71756 [2022-01-10 06:41:30,715 INFO L226 Difference]: Without dead ends: 45150 [2022-01-10 06:41:30,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 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 06:41:30,760 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 108 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:30,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 378 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:30,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45150 states. [2022-01-10 06:41:32,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45150 to 43295. [2022-01-10 06:41:32,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43295 states, 37075 states have (on average 1.2962643290627107) internal successors, (48059), 37791 states have internal predecessors, (48059), 3352 states have call successors, (3352), 2188 states have call predecessors, (3352), 2867 states have return successors, (4757), 3316 states have call predecessors, (4757), 3349 states have call successors, (4757) [2022-01-10 06:41:32,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43295 states to 43295 states and 56168 transitions. [2022-01-10 06:41:32,602 INFO L78 Accepts]: Start accepts. Automaton has 43295 states and 56168 transitions. Word has length 119 [2022-01-10 06:41:32,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:32,602 INFO L470 AbstractCegarLoop]: Abstraction has 43295 states and 56168 transitions. [2022-01-10 06:41:32,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:41:32,603 INFO L276 IsEmpty]: Start isEmpty. Operand 43295 states and 56168 transitions. [2022-01-10 06:41:32,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-10 06:41:32,611 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:32,611 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:41:32,619 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 06:41:32,818 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 06:41:32,818 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:32,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:32,818 INFO L85 PathProgramCache]: Analyzing trace with hash 2068954160, now seen corresponding path program 1 times [2022-01-10 06:41:32,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:32,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982624045] [2022-01-10 06:41:32,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:32,819 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:32,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:32,820 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 06:41:32,821 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 06:41:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:32,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:41:32,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:33,071 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 06:41:33,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:33,071 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:33,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982624045] [2022-01-10 06:41:33,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982624045] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:33,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:33,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:41:33,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350310330] [2022-01-10 06:41:33,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:33,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:41:33,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:33,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:41:33,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:41:33,072 INFO L87 Difference]: Start difference. First operand 43295 states and 56168 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:41:35,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:35,627 INFO L93 Difference]: Finished difference Result 108741 states and 141291 transitions. [2022-01-10 06:41:35,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:41:35,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 136 [2022-01-10 06:41:35,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:35,883 INFO L225 Difference]: With dead ends: 108741 [2022-01-10 06:41:35,883 INFO L226 Difference]: Without dead ends: 65458 [2022-01-10 06:41:36,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 134 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 06:41:36,082 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 92 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 370 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 06:41:36,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 370 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:36,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65458 states. [2022-01-10 06:41:38,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65458 to 65453. [2022-01-10 06:41:38,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65453 states, 55766 states have (on average 1.2837929921457518) internal successors, (71592), 56741 states have internal predecessors, (71592), 5300 states have call successors, (5300), 3464 states have call predecessors, (5300), 4386 states have return successors, (7213), 5248 states have call predecessors, (7213), 5297 states have call successors, (7213) [2022-01-10 06:41:39,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65453 states to 65453 states and 84105 transitions. [2022-01-10 06:41:39,114 INFO L78 Accepts]: Start accepts. Automaton has 65453 states and 84105 transitions. Word has length 136 [2022-01-10 06:41:39,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:39,114 INFO L470 AbstractCegarLoop]: Abstraction has 65453 states and 84105 transitions. [2022-01-10 06:41:39,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:41:39,115 INFO L276 IsEmpty]: Start isEmpty. Operand 65453 states and 84105 transitions. [2022-01-10 06:41:39,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-10 06:41:39,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:39,125 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:41:39,133 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 06:41:39,331 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 06:41:39,331 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:39,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:39,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1702236170, now seen corresponding path program 1 times [2022-01-10 06:41:39,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:39,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026229843] [2022-01-10 06:41:39,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:39,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:39,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:39,334 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 06:41:39,335 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 06:41:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:39,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:41:39,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 06:41:39,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:39,579 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:39,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026229843] [2022-01-10 06:41:39,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026229843] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:39,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:39,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:41:39,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186932966] [2022-01-10 06:41:39,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:39,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:41:39,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:39,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:41:39,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:41:39,580 INFO L87 Difference]: Start difference. First operand 65453 states and 84105 transitions. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 5 states have internal predecessors, (107), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:41:41,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:41,571 INFO L93 Difference]: Finished difference Result 111989 states and 144479 transitions. [2022-01-10 06:41:41,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:41:41,572 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 5 states have internal predecessors, (107), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 144 [2022-01-10 06:41:41,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:41,693 INFO L225 Difference]: With dead ends: 111989 [2022-01-10 06:41:41,693 INFO L226 Difference]: Without dead ends: 46548 [2022-01-10 06:41:41,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 139 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 06:41:41,779 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 60 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:41,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 834 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:41,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46548 states. [2022-01-10 06:41:43,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46548 to 45083. [2022-01-10 06:41:43,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45083 states, 39811 states have (on average 1.2933108939740272) internal successors, (51488), 40255 states have internal predecessors, (51488), 2744 states have call successors, (2744), 1790 states have call predecessors, (2744), 2527 states have return successors, (3910), 3037 states have call predecessors, (3910), 2741 states have call successors, (3910) [2022-01-10 06:41:43,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45083 states to 45083 states and 58142 transitions. [2022-01-10 06:41:43,794 INFO L78 Accepts]: Start accepts. Automaton has 45083 states and 58142 transitions. Word has length 144 [2022-01-10 06:41:43,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:43,794 INFO L470 AbstractCegarLoop]: Abstraction has 45083 states and 58142 transitions. [2022-01-10 06:41:43,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 5 states have internal predecessors, (107), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:41:43,794 INFO L276 IsEmpty]: Start isEmpty. Operand 45083 states and 58142 transitions. [2022-01-10 06:41:43,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-10 06:41:43,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:43,809 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:41:43,829 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 06:41:44,016 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 06:41:44,016 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:44,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:44,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1051693338, now seen corresponding path program 1 times [2022-01-10 06:41:44,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:44,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384310132] [2022-01-10 06:41:44,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:44,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:44,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:44,018 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 06:41:44,019 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 06:41:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:44,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:41:44,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:44,420 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-01-10 06:41:44,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:44,420 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:44,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384310132] [2022-01-10 06:41:44,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384310132] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:44,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:44,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:41:44,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826756482] [2022-01-10 06:41:44,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:44,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:41:44,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:44,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:41:44,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:41:44,421 INFO L87 Difference]: Start difference. First operand 45083 states and 58142 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:41:46,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:46,068 INFO L93 Difference]: Finished difference Result 89688 states and 115742 transitions. [2022-01-10 06:41:46,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:41:46,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 156 [2022-01-10 06:41:46,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:46,165 INFO L225 Difference]: With dead ends: 89688 [2022-01-10 06:41:46,166 INFO L226 Difference]: Without dead ends: 44926 [2022-01-10 06:41:46,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:41:46,222 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 44 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:46,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 334 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:46,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44926 states. [2022-01-10 06:41:47,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44926 to 44904. [2022-01-10 06:41:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44904 states, 39656 states have (on average 1.29382691143837) internal successors, (51308), 40100 states have internal predecessors, (51308), 2732 states have call successors, (2732), 1778 states have call predecessors, (2732), 2515 states have return successors, (3898), 3025 states have call predecessors, (3898), 2729 states have call successors, (3898) [2022-01-10 06:41:48,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44904 states to 44904 states and 57938 transitions. [2022-01-10 06:41:48,084 INFO L78 Accepts]: Start accepts. Automaton has 44904 states and 57938 transitions. Word has length 156 [2022-01-10 06:41:48,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:48,084 INFO L470 AbstractCegarLoop]: Abstraction has 44904 states and 57938 transitions. [2022-01-10 06:41:48,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:41:48,085 INFO L276 IsEmpty]: Start isEmpty. Operand 44904 states and 57938 transitions. [2022-01-10 06:41:48,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-10 06:41:48,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:48,094 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:41:48,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-01-10 06:41:48,299 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 06:41:48,299 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:48,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:48,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1968698029, now seen corresponding path program 1 times [2022-01-10 06:41:48,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:48,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791084865] [2022-01-10 06:41:48,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:48,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:48,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:48,301 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 06:41:48,302 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 06:41:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:48,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:41:48,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 92 proven. 11 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-01-10 06:41:48,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:41:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-10 06:41:48,976 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:48,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791084865] [2022-01-10 06:41:48,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791084865] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:41:48,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:41:48,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 06:41:48,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666951544] [2022-01-10 06:41:48,976 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:41:48,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:41:48,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:48,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:41:48,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:41:48,977 INFO L87 Difference]: Start difference. First operand 44904 states and 57938 transitions. Second operand has 6 states, 6 states have (on average 31.666666666666668) internal successors, (190), 6 states have internal predecessors, (190), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2022-01-10 06:41:51,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:51,830 INFO L93 Difference]: Finished difference Result 112097 states and 146021 transitions. [2022-01-10 06:41:51,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:41:51,831 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 31.666666666666668) internal successors, (190), 6 states have internal predecessors, (190), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 170 [2022-01-10 06:41:51,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:52,003 INFO L225 Difference]: With dead ends: 112097 [2022-01-10 06:41:52,003 INFO L226 Difference]: Without dead ends: 67482 [2022-01-10 06:41:52,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:41:52,059 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 963 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:52,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [963 Valid, 824 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:41:52,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67482 states. [2022-01-10 06:41:54,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67482 to 64824. [2022-01-10 06:41:54,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64824 states, 57325 states have (on average 1.2988573920628) internal successors, (74457), 58098 states have internal predecessors, (74457), 3811 states have call successors, (3811), 2466 states have call predecessors, (3811), 3687 states have return successors, (5652), 4259 states have call predecessors, (5652), 3808 states have call successors, (5652) [2022-01-10 06:41:54,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64824 states to 64824 states and 83920 transitions. [2022-01-10 06:41:54,930 INFO L78 Accepts]: Start accepts. Automaton has 64824 states and 83920 transitions. Word has length 170 [2022-01-10 06:41:54,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:54,930 INFO L470 AbstractCegarLoop]: Abstraction has 64824 states and 83920 transitions. [2022-01-10 06:41:54,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.666666666666668) internal successors, (190), 6 states have internal predecessors, (190), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2022-01-10 06:41:54,930 INFO L276 IsEmpty]: Start isEmpty. Operand 64824 states and 83920 transitions. [2022-01-10 06:41:54,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-10 06:41:54,934 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:54,935 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:41:54,941 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 06:41:55,142 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 06:41:55,142 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:55,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:55,143 INFO L85 PathProgramCache]: Analyzing trace with hash -116950749, now seen corresponding path program 1 times [2022-01-10 06:41:55,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:55,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239505431] [2022-01-10 06:41:55,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:55,143 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:55,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:55,144 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 06:41:55,145 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 06:41:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:55,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:41:55,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 06:41:55,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:55,442 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:55,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239505431] [2022-01-10 06:41:55,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239505431] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:55,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:55,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:41:55,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378165294] [2022-01-10 06:41:55,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:55,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:41:55,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:55,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:41:55,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:41:55,443 INFO L87 Difference]: Start difference. First operand 64824 states and 83920 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-01-10 06:41:57,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:57,884 INFO L93 Difference]: Finished difference Result 122121 states and 159990 transitions. [2022-01-10 06:41:57,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:41:57,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 176 [2022-01-10 06:41:57,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:58,028 INFO L225 Difference]: With dead ends: 122121 [2022-01-10 06:41:58,029 INFO L226 Difference]: Without dead ends: 57710 [2022-01-10 06:41:58,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 174 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 06:41:58,128 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 111 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 370 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 06:41:58,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 370 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:58,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57710 states. [2022-01-10 06:42:00,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57710 to 57710. [2022-01-10 06:42:00,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57710 states, 51102 states have (on average 1.284431137724551) internal successors, (65637), 51835 states have internal predecessors, (65637), 3324 states have call successors, (3324), 2153 states have call predecessors, (3324), 3283 states have return successors, (5003), 3721 states have call predecessors, (5003), 3321 states have call successors, (5003) [2022-01-10 06:42:00,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57710 states to 57710 states and 73964 transitions. [2022-01-10 06:42:00,789 INFO L78 Accepts]: Start accepts. Automaton has 57710 states and 73964 transitions. Word has length 176 [2022-01-10 06:42:00,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:42:00,790 INFO L470 AbstractCegarLoop]: Abstraction has 57710 states and 73964 transitions. [2022-01-10 06:42:00,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-01-10 06:42:00,790 INFO L276 IsEmpty]: Start isEmpty. Operand 57710 states and 73964 transitions. [2022-01-10 06:42:00,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-10 06:42:00,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:42:00,794 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:42:00,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-01-10 06:42:00,999 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 06:42:01,000 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:42:01,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:42:01,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1887251312, now seen corresponding path program 1 times [2022-01-10 06:42:01,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:42:01,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94192138] [2022-01-10 06:42:01,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:42:01,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:42:01,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:42:01,002 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 06:42:01,003 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 06:42:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:42:01,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:42:01,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:42:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-01-10 06:42:01,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:42:01,322 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:42:01,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94192138] [2022-01-10 06:42:01,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94192138] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:42:01,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:42:01,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:42:01,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326748704] [2022-01-10 06:42:01,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:42:01,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:42:01,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:42:01,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:42:01,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:42:01,323 INFO L87 Difference]: Start difference. First operand 57710 states and 73964 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-01-10 06:42:03,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:42:03,289 INFO L93 Difference]: Finished difference Result 105107 states and 135063 transitions. [2022-01-10 06:42:03,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:42:03,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 177 [2022-01-10 06:42:03,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:42:03,392 INFO L225 Difference]: With dead ends: 105107 [2022-01-10 06:42:03,392 INFO L226 Difference]: Without dead ends: 47425 [2022-01-10 06:42:03,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 175 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 06:42:03,459 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 64 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 365 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 06:42:03,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 365 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:42:03,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47425 states. [2022-01-10 06:42:05,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47425 to 47421. [2022-01-10 06:42:05,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47421 states, 42072 states have (on average 1.2878636622932116) internal successors, (54183), 42728 states have internal predecessors, (54183), 2652 states have call successors, (2652), 1725 states have call predecessors, (2652), 2696 states have return successors, (4068), 2967 states have call predecessors, (4068), 2649 states have call successors, (4068) [2022-01-10 06:42:05,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47421 states to 47421 states and 60903 transitions. [2022-01-10 06:42:05,529 INFO L78 Accepts]: Start accepts. Automaton has 47421 states and 60903 transitions. Word has length 177 [2022-01-10 06:42:05,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:42:05,531 INFO L470 AbstractCegarLoop]: Abstraction has 47421 states and 60903 transitions. [2022-01-10 06:42:05,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-01-10 06:42:05,532 INFO L276 IsEmpty]: Start isEmpty. Operand 47421 states and 60903 transitions. [2022-01-10 06:42:05,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-10 06:42:05,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:42:05,535 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:42:05,562 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 06:42:05,740 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 06:42:05,741 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:42:05,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:42:05,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1457011893, now seen corresponding path program 1 times [2022-01-10 06:42:05,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:42:05,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608468949] [2022-01-10 06:42:05,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:42:05,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:42:05,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:42:05,743 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 06:42:05,745 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 06:42:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:42:05,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:42:05,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:42:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-10 06:42:05,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:42:05,989 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:42:05,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608468949] [2022-01-10 06:42:05,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608468949] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:42:05,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:42:05,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:42:05,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879212536] [2022-01-10 06:42:05,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:42:05,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:42:05,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:42:05,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:42:05,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:42:05,990 INFO L87 Difference]: Start difference. First operand 47421 states and 60903 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15)