/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/seq-mthreaded/pals_STARTPALS_Triplicated.2.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:46:05,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:46:05,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:46:05,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:46:05,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:46:05,149 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:46:05,150 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:46:05,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:46:05,152 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:46:05,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:46:05,161 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:46:05,162 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:46:05,162 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:46:05,163 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:46:05,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:46:05,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:46:05,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:46:05,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:46:05,166 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:46:05,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:46:05,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:46:05,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:46:05,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:46:05,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:46:05,185 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 06:46:05,185 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 06:46:05,185 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 06:46:05,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 06:46:05,186 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 06:46:05,187 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 06:46:05,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 06:46:05,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 06:46:05,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 06:46:05,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 06:46:05,189 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 06:46:05,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 06:46:05,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 06:46:05,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 06:46:05,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:46:05,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:46:05,191 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:46:05,198 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 06:46:05,218 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:46:05,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:46:05,219 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:46:05,219 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:46:05,225 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:46:05,225 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:46:05,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:46:05,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:46:05,225 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:46:05,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:46:05,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:46:05,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:46:05,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:46:05,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:46:05,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:46:05,226 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:46:05,227 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:46:05,227 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:46:05,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:46:05,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:46:05,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:46:05,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:46:05,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:46:05,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:46:05,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:46:05,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:46:05,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:46:05,229 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:46:05,229 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:46:05,229 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:46:05,229 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:46:05,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:46:05,229 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:46:05,229 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:46:05,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:46:05,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:46:05,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:46:05,446 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:46:05,447 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:46:05,448 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_Triplicated.2.ufo.UNBOUNDED.pals.c [2022-01-10 06:46:05,487 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e990430ce/da44ad06a8b24150a02ccb2d51208635/FLAG03abbbaf8 [2022-01-10 06:46:05,896 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:46:05,896 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_Triplicated.2.ufo.UNBOUNDED.pals.c [2022-01-10 06:46:05,904 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e990430ce/da44ad06a8b24150a02ccb2d51208635/FLAG03abbbaf8 [2022-01-10 06:46:06,267 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e990430ce/da44ad06a8b24150a02ccb2d51208635 [2022-01-10 06:46:06,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:46:06,271 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:46:06,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:46:06,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:46:06,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:46:06,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:46:06" (1/1) ... [2022-01-10 06:46:06,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e547e3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:06, skipping insertion in model container [2022-01-10 06:46:06,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:46:06" (1/1) ... [2022-01-10 06:46:06,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:46:06,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:46:06,488 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_Triplicated.2.ufo.UNBOUNDED.pals.c[11921,11934] [2022-01-10 06:46:06,491 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:46:06,497 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:46:06,564 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_Triplicated.2.ufo.UNBOUNDED.pals.c[11921,11934] [2022-01-10 06:46:06,565 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:46:06,578 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:46:06,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:06 WrapperNode [2022-01-10 06:46:06,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:46:06,580 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:46:06,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:46:06,580 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:46:06,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:06" (1/1) ... [2022-01-10 06:46:06,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:06" (1/1) ... [2022-01-10 06:46:06,611 INFO L137 Inliner]: procedures = 28, calls = 51, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 378 [2022-01-10 06:46:06,612 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:46:06,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:46:06,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:46:06,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:46:06,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:06" (1/1) ... [2022-01-10 06:46:06,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:06" (1/1) ... [2022-01-10 06:46:06,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:06" (1/1) ... [2022-01-10 06:46:06,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:06" (1/1) ... [2022-01-10 06:46:06,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:06" (1/1) ... [2022-01-10 06:46:06,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:06" (1/1) ... [2022-01-10 06:46:06,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:06" (1/1) ... [2022-01-10 06:46:06,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:46:06,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:46:06,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:46:06,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:46:06,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:06" (1/1) ... [2022-01-10 06:46:06,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:46:06,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:46:06,664 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 06:46:06,688 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 06:46:06,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:46:06,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:46:06,714 INFO L130 BoogieDeclarations]: Found specification of procedure write_history_bool [2022-01-10 06:46:06,714 INFO L138 BoogieDeclarations]: Found implementation of procedure write_history_bool [2022-01-10 06:46:06,714 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-01-10 06:46:06,715 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-01-10 06:46:06,715 INFO L130 BoogieDeclarations]: Found specification of procedure read_history_int8 [2022-01-10 06:46:06,715 INFO L138 BoogieDeclarations]: Found implementation of procedure read_history_int8 [2022-01-10 06:46:06,715 INFO L130 BoogieDeclarations]: Found specification of procedure read_history_bool [2022-01-10 06:46:06,715 INFO L138 BoogieDeclarations]: Found implementation of procedure read_history_bool [2022-01-10 06:46:06,715 INFO L130 BoogieDeclarations]: Found specification of procedure add_history_type [2022-01-10 06:46:06,715 INFO L138 BoogieDeclarations]: Found implementation of procedure add_history_type [2022-01-10 06:46:06,715 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-10 06:46:06,715 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-10 06:46:06,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:46:06,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:46:06,804 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:46:06,805 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:46:07,126 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:46:07,133 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:46:07,133 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 06:46:07,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:46:07 BoogieIcfgContainer [2022-01-10 06:46:07,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:46:07,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:46:07,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:46:07,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:46:07,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:46:06" (1/3) ... [2022-01-10 06:46:07,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c3c19e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:46:07, skipping insertion in model container [2022-01-10 06:46:07,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:06" (2/3) ... [2022-01-10 06:46:07,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c3c19e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:46:07, skipping insertion in model container [2022-01-10 06:46:07,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:46:07" (3/3) ... [2022-01-10 06:46:07,147 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_Triplicated.2.ufo.UNBOUNDED.pals.c [2022-01-10 06:46:07,150 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:46:07,150 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:46:07,191 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:46:07,195 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 06:46:07,195 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:46:07,223 INFO L276 IsEmpty]: Start isEmpty. Operand has 186 states, 141 states have (on average 1.5886524822695036) internal successors, (224), 146 states have internal predecessors, (224), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-01-10 06:46:07,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 06:46:07,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:07,228 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:07,228 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:07,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:07,232 INFO L85 PathProgramCache]: Analyzing trace with hash 535506886, now seen corresponding path program 1 times [2022-01-10 06:46:07,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:07,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438647705] [2022-01-10 06:46:07,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:07,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:07,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:07,243 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 06:46:07,260 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 06:46:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:07,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:07,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:07,410 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 06:46:07,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:07,412 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:07,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438647705] [2022-01-10 06:46:07,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438647705] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:07,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:07,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:07,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437976193] [2022-01-10 06:46:07,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:07,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:07,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:07,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:07,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:07,445 INFO L87 Difference]: Start difference. First operand has 186 states, 141 states have (on average 1.5886524822695036) internal successors, (224), 146 states have internal predecessors, (224), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:07,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:07,542 INFO L93 Difference]: Finished difference Result 373 states and 641 transitions. [2022-01-10 06:46:07,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:07,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-10 06:46:07,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:07,552 INFO L225 Difference]: With dead ends: 373 [2022-01-10 06:46:07,553 INFO L226 Difference]: Without dead ends: 190 [2022-01-10 06:46:07,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 06:46:07,559 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 18 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:07,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 829 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:07,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-10 06:46:07,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2022-01-10 06:46:07,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 143 states have (on average 1.5384615384615385) internal successors, (220), 147 states have internal predecessors, (220), 37 states have call successors, (37), 7 states have call predecessors, (37), 7 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-01-10 06:46:07,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 294 transitions. [2022-01-10 06:46:07,596 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 294 transitions. Word has length 15 [2022-01-10 06:46:07,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:07,597 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 294 transitions. [2022-01-10 06:46:07,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:07,597 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 294 transitions. [2022-01-10 06:46:07,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 06:46:07,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:07,598 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:07,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:07,805 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 06:46:07,805 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:07,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:07,806 INFO L85 PathProgramCache]: Analyzing trace with hash -355990154, now seen corresponding path program 1 times [2022-01-10 06:46:07,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:07,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647757043] [2022-01-10 06:46:07,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:07,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:07,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:07,808 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 06:46:07,850 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 06:46:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:07,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:07,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:07,962 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 06:46:07,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:07,963 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:07,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647757043] [2022-01-10 06:46:07,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647757043] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:07,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:07,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:07,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369368113] [2022-01-10 06:46:07,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:07,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:07,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:07,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:07,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:07,965 INFO L87 Difference]: Start difference. First operand 188 states and 294 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:08,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:08,029 INFO L93 Difference]: Finished difference Result 389 states and 611 transitions. [2022-01-10 06:46:08,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:08,033 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-10 06:46:08,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:08,035 INFO L225 Difference]: With dead ends: 389 [2022-01-10 06:46:08,035 INFO L226 Difference]: Without dead ends: 204 [2022-01-10 06:46:08,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 06:46:08,037 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 25 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:08,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 850 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:08,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-01-10 06:46:08,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 201. [2022-01-10 06:46:08,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 154 states have (on average 1.5194805194805194) internal successors, (234), 158 states have internal predecessors, (234), 38 states have call successors, (38), 8 states have call predecessors, (38), 8 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-01-10 06:46:08,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 310 transitions. [2022-01-10 06:46:08,066 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 310 transitions. Word has length 16 [2022-01-10 06:46:08,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:08,067 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 310 transitions. [2022-01-10 06:46:08,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:08,067 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 310 transitions. [2022-01-10 06:46:08,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 06:46:08,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:08,075 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] [2022-01-10 06:46:08,092 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 06:46:08,282 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 06:46:08,282 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:08,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:08,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1515048690, now seen corresponding path program 1 times [2022-01-10 06:46:08,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:08,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753534054] [2022-01-10 06:46:08,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:08,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:08,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:08,285 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 06:46:08,287 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 06:46:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:08,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:46:08,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:08,383 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 06:46:08,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:08,384 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:08,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753534054] [2022-01-10 06:46:08,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753534054] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:08,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:08,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:46:08,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069268342] [2022-01-10 06:46:08,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:08,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:46:08,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:08,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:46:08,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:08,391 INFO L87 Difference]: Start difference. First operand 201 states and 310 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:46:08,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:08,430 INFO L93 Difference]: Finished difference Result 421 states and 657 transitions. [2022-01-10 06:46:08,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:46:08,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-10 06:46:08,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:08,437 INFO L225 Difference]: With dead ends: 421 [2022-01-10 06:46:08,437 INFO L226 Difference]: Without dead ends: 230 [2022-01-10 06:46:08,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 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 06:46:08,440 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 22 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:08,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 574 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:08,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-10 06:46:08,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 203. [2022-01-10 06:46:08,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 156 states have (on average 1.5128205128205128) internal successors, (236), 160 states have internal predecessors, (236), 38 states have call successors, (38), 8 states have call predecessors, (38), 8 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-01-10 06:46:08,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 312 transitions. [2022-01-10 06:46:08,481 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 312 transitions. Word has length 24 [2022-01-10 06:46:08,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:08,481 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 312 transitions. [2022-01-10 06:46:08,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:46:08,481 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 312 transitions. [2022-01-10 06:46:08,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-10 06:46:08,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:08,489 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] [2022-01-10 06:46:08,497 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 06:46:08,695 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 06:46:08,695 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:08,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:08,696 INFO L85 PathProgramCache]: Analyzing trace with hash 257838497, now seen corresponding path program 1 times [2022-01-10 06:46:08,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:08,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705944410] [2022-01-10 06:46:08,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:08,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:08,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:08,700 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 06:46:08,710 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 06:46:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:08,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:46:08,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:46:08,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:08,814 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:08,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705944410] [2022-01-10 06:46:08,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705944410] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:08,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:08,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:46:08,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277340072] [2022-01-10 06:46:08,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:08,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:46:08,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:08,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:46:08,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:08,819 INFO L87 Difference]: Start difference. First operand 203 states and 312 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 06:46:08,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:08,853 INFO L93 Difference]: Finished difference Result 503 states and 792 transitions. [2022-01-10 06:46:08,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:08,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2022-01-10 06:46:08,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:08,856 INFO L225 Difference]: With dead ends: 503 [2022-01-10 06:46:08,856 INFO L226 Difference]: Without dead ends: 316 [2022-01-10 06:46:08,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:08,862 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 128 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:08,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 1214 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:08,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-01-10 06:46:08,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 207. [2022-01-10 06:46:08,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 159 states have (on average 1.5031446540880504) internal successors, (239), 163 states have internal predecessors, (239), 38 states have call successors, (38), 8 states have call predecessors, (38), 9 states have return successors, (39), 39 states have call predecessors, (39), 38 states have call successors, (39) [2022-01-10 06:46:08,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 316 transitions. [2022-01-10 06:46:08,887 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 316 transitions. Word has length 32 [2022-01-10 06:46:08,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:08,887 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 316 transitions. [2022-01-10 06:46:08,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 06:46:08,887 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 316 transitions. [2022-01-10 06:46:08,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 06:46:08,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:08,888 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] [2022-01-10 06:46:08,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:09,094 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 06:46:09,094 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:09,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:09,097 INFO L85 PathProgramCache]: Analyzing trace with hash -559699066, now seen corresponding path program 1 times [2022-01-10 06:46:09,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:09,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [663515490] [2022-01-10 06:46:09,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:09,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:09,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:09,107 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 06:46:09,111 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 06:46:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:09,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:46:09,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:09,258 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 06:46:09,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:09,258 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:09,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [663515490] [2022-01-10 06:46:09,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [663515490] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:09,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:09,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:46:09,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5166365] [2022-01-10 06:46:09,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:09,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:46:09,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:09,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:46:09,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:46:09,260 INFO L87 Difference]: Start difference. First operand 207 states and 316 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 06:46:09,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:09,318 INFO L93 Difference]: Finished difference Result 359 states and 554 transitions. [2022-01-10 06:46:09,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:46:09,318 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-01-10 06:46:09,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:09,321 INFO L225 Difference]: With dead ends: 359 [2022-01-10 06:46:09,321 INFO L226 Difference]: Without dead ends: 203 [2022-01-10 06:46:09,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 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 06:46:09,322 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 128 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:09,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1232 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:09,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-10 06:46:09,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-01-10 06:46:09,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 156 states have (on average 1.4807692307692308) internal successors, (231), 160 states have internal predecessors, (231), 38 states have call successors, (38), 8 states have call predecessors, (38), 8 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-01-10 06:46:09,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 307 transitions. [2022-01-10 06:46:09,346 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 307 transitions. Word has length 35 [2022-01-10 06:46:09,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:09,346 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 307 transitions. [2022-01-10 06:46:09,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 06:46:09,346 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 307 transitions. [2022-01-10 06:46:09,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 06:46:09,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:09,348 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] [2022-01-10 06:46:09,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:09,548 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 06:46:09,548 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:09,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:09,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1454829501, now seen corresponding path program 1 times [2022-01-10 06:46:09,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:09,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099550408] [2022-01-10 06:46:09,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:09,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:09,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:09,551 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 06:46:09,552 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 06:46:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:09,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:09,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:09,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:46:09,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:46:09,714 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:09,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099550408] [2022-01-10 06:46:09,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099550408] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:09,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:09,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 06:46:09,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310173308] [2022-01-10 06:46:09,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:09,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:46:09,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:09,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:46:09,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:46:09,716 INFO L87 Difference]: Start difference. First operand 203 states and 307 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:46:09,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:09,756 INFO L93 Difference]: Finished difference Result 454 states and 701 transitions. [2022-01-10 06:46:09,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:09,756 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2022-01-10 06:46:09,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:09,758 INFO L225 Difference]: With dead ends: 454 [2022-01-10 06:46:09,758 INFO L226 Difference]: Without dead ends: 262 [2022-01-10 06:46:09,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:46:09,759 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 118 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:09,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 905 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:09,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-01-10 06:46:09,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 256. [2022-01-10 06:46:09,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 199 states have (on average 1.4572864321608041) internal successors, (290), 203 states have internal predecessors, (290), 48 states have call successors, (48), 8 states have call predecessors, (48), 8 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-01-10 06:46:09,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 386 transitions. [2022-01-10 06:46:09,768 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 386 transitions. Word has length 35 [2022-01-10 06:46:09,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:09,768 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 386 transitions. [2022-01-10 06:46:09,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:46:09,769 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 386 transitions. [2022-01-10 06:46:09,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 06:46:09,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:09,769 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:09,791 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 06:46:09,991 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 06:46:09,994 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:09,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:09,994 INFO L85 PathProgramCache]: Analyzing trace with hash -581068643, now seen corresponding path program 2 times [2022-01-10 06:46:09,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:09,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409635856] [2022-01-10 06:46:09,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:46:09,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:09,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:09,995 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 06:46:09,997 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 06:46:10,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 06:46:10,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:46:10,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:10,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-10 06:46:10,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:10,123 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:10,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409635856] [2022-01-10 06:46:10,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409635856] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:10,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:10,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:10,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285699373] [2022-01-10 06:46:10,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:10,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:10,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:10,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:10,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:10,124 INFO L87 Difference]: Start difference. First operand 256 states and 386 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 06:46:10,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:10,166 INFO L93 Difference]: Finished difference Result 481 states and 750 transitions. [2022-01-10 06:46:10,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:46:10,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2022-01-10 06:46:10,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:10,171 INFO L225 Difference]: With dead ends: 481 [2022-01-10 06:46:10,172 INFO L226 Difference]: Without dead ends: 254 [2022-01-10 06:46:10,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 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 06:46:10,174 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 13 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:10,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 781 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:10,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-10 06:46:10,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-01-10 06:46:10,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 198 states have (on average 1.4545454545454546) internal successors, (288), 202 states have internal predecessors, (288), 47 states have call successors, (47), 8 states have call predecessors, (47), 8 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-01-10 06:46:10,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 382 transitions. [2022-01-10 06:46:10,188 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 382 transitions. Word has length 57 [2022-01-10 06:46:10,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:10,188 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 382 transitions. [2022-01-10 06:46:10,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 06:46:10,189 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 382 transitions. [2022-01-10 06:46:10,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 06:46:10,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:10,190 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:10,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:10,396 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 06:46:10,397 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:10,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:10,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1268107058, now seen corresponding path program 1 times [2022-01-10 06:46:10,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:10,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2108403621] [2022-01-10 06:46:10,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:10,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:10,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:10,400 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 06:46:10,402 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 06:46:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:10,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:10,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-10 06:46:10,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:10,553 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:10,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2108403621] [2022-01-10 06:46:10,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2108403621] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:10,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:10,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:10,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854559663] [2022-01-10 06:46:10,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:10,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:10,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:10,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:10,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:10,571 INFO L87 Difference]: Start difference. First operand 254 states and 382 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 06:46:10,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:10,602 INFO L93 Difference]: Finished difference Result 488 states and 754 transitions. [2022-01-10 06:46:10,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:10,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2022-01-10 06:46:10,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:10,605 INFO L225 Difference]: With dead ends: 488 [2022-01-10 06:46:10,605 INFO L226 Difference]: Without dead ends: 263 [2022-01-10 06:46:10,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 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 06:46:10,606 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 19 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:10,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 816 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:10,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-01-10 06:46:10,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 261. [2022-01-10 06:46:10,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 204 states have (on average 1.4509803921568627) internal successors, (296), 208 states have internal predecessors, (296), 47 states have call successors, (47), 9 states have call predecessors, (47), 9 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-01-10 06:46:10,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 390 transitions. [2022-01-10 06:46:10,618 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 390 transitions. Word has length 57 [2022-01-10 06:46:10,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:10,620 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 390 transitions. [2022-01-10 06:46:10,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 06:46:10,620 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 390 transitions. [2022-01-10 06:46:10,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-10 06:46:10,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:10,621 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:10,627 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 06:46:10,827 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 06:46:10,827 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:10,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:10,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2085918136, now seen corresponding path program 1 times [2022-01-10 06:46:10,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:10,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [190136310] [2022-01-10 06:46:10,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:10,828 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:10,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:10,829 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 06:46:10,831 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 06:46:10,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:10,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:10,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 06:46:10,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:10,960 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:10,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [190136310] [2022-01-10 06:46:10,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [190136310] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:10,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:10,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:10,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574520] [2022-01-10 06:46:10,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:10,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:10,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:10,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:10,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:10,961 INFO L87 Difference]: Start difference. First operand 261 states and 390 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 06:46:10,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:10,988 INFO L93 Difference]: Finished difference Result 532 states and 806 transitions. [2022-01-10 06:46:10,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:10,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2022-01-10 06:46:10,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:10,990 INFO L225 Difference]: With dead ends: 532 [2022-01-10 06:46:10,990 INFO L226 Difference]: Without dead ends: 300 [2022-01-10 06:46:10,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 56 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 06:46:10,991 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 24 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:10,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 830 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:10,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-01-10 06:46:10,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 297. [2022-01-10 06:46:10,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 236 states have (on average 1.4110169491525424) internal successors, (333), 240 states have internal predecessors, (333), 50 states have call successors, (50), 10 states have call predecessors, (50), 10 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-01-10 06:46:10,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 433 transitions. [2022-01-10 06:46:10,999 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 433 transitions. Word has length 58 [2022-01-10 06:46:10,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:10,999 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 433 transitions. [2022-01-10 06:46:10,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 06:46:10,999 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 433 transitions. [2022-01-10 06:46:10,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 06:46:10,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:10,999 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:11,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:11,206 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 06:46:11,206 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:11,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:11,206 INFO L85 PathProgramCache]: Analyzing trace with hash 2083366662, now seen corresponding path program 1 times [2022-01-10 06:46:11,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:11,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226700866] [2022-01-10 06:46:11,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:11,207 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:11,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:11,208 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 06:46:11,210 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 06:46:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:11,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:46:11,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-10 06:46:11,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:11,328 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:11,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226700866] [2022-01-10 06:46:11,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226700866] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:11,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:11,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:46:11,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447131619] [2022-01-10 06:46:11,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:11,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:46:11,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:11,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:46:11,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:11,329 INFO L87 Difference]: Start difference. First operand 297 states and 433 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 06:46:11,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:11,346 INFO L93 Difference]: Finished difference Result 543 states and 805 transitions. [2022-01-10 06:46:11,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:11,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 76 [2022-01-10 06:46:11,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:11,347 INFO L225 Difference]: With dead ends: 543 [2022-01-10 06:46:11,347 INFO L226 Difference]: Without dead ends: 299 [2022-01-10 06:46:11,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:11,348 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 0 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1107 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 06:46:11,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1107 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:11,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-01-10 06:46:11,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 297. [2022-01-10 06:46:11,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 236 states have (on average 1.3983050847457628) internal successors, (330), 240 states have internal predecessors, (330), 50 states have call successors, (50), 10 states have call predecessors, (50), 10 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-01-10 06:46:11,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 430 transitions. [2022-01-10 06:46:11,355 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 430 transitions. Word has length 76 [2022-01-10 06:46:11,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:11,356 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 430 transitions. [2022-01-10 06:46:11,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 06:46:11,356 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 430 transitions. [2022-01-10 06:46:11,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-10 06:46:11,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:11,356 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:11,368 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 06:46:11,563 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 06:46:11,563 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:11,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:11,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1302977286, now seen corresponding path program 1 times [2022-01-10 06:46:11,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:11,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253161888] [2022-01-10 06:46:11,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:11,564 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:11,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:11,565 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 06:46:11,566 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 06:46:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:11,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:11,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-01-10 06:46:11,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:11,719 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:11,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253161888] [2022-01-10 06:46:11,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1253161888] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:11,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:11,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:11,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925817449] [2022-01-10 06:46:11,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:11,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:11,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:11,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:11,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:11,720 INFO L87 Difference]: Start difference. First operand 297 states and 430 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 06:46:11,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:11,745 INFO L93 Difference]: Finished difference Result 530 states and 789 transitions. [2022-01-10 06:46:11,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:46:11,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 105 [2022-01-10 06:46:11,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:11,747 INFO L225 Difference]: With dead ends: 530 [2022-01-10 06:46:11,747 INFO L226 Difference]: Without dead ends: 291 [2022-01-10 06:46:11,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 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 06:46:11,748 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 15 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:11,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 789 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:11,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-01-10 06:46:11,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2022-01-10 06:46:11,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 231 states have (on average 1.3766233766233766) internal successors, (318), 235 states have internal predecessors, (318), 49 states have call successors, (49), 10 states have call predecessors, (49), 10 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-01-10 06:46:11,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 416 transitions. [2022-01-10 06:46:11,755 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 416 transitions. Word has length 105 [2022-01-10 06:46:11,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:11,755 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 416 transitions. [2022-01-10 06:46:11,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 06:46:11,756 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 416 transitions. [2022-01-10 06:46:11,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-10 06:46:11,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:11,757 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 06:46:11,787 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 06:46:11,963 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 06:46:11,964 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:11,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:11,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1766564262, now seen corresponding path program 1 times [2022-01-10 06:46:11,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:11,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1696059897] [2022-01-10 06:46:11,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:11,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:11,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:11,966 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 06:46:11,967 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 06:46:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:12,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:12,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-01-10 06:46:12,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:12,277 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:12,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1696059897] [2022-01-10 06:46:12,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1696059897] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:12,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:12,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:12,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327738971] [2022-01-10 06:46:12,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:12,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:12,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:12,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:12,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:12,278 INFO L87 Difference]: Start difference. First operand 291 states and 416 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:46:12,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:12,337 INFO L93 Difference]: Finished difference Result 527 states and 769 transitions. [2022-01-10 06:46:12,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:12,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 139 [2022-01-10 06:46:12,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:12,353 INFO L225 Difference]: With dead ends: 527 [2022-01-10 06:46:12,353 INFO L226 Difference]: Without dead ends: 274 [2022-01-10 06:46:12,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 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 06:46:12,354 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 35 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:12,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 750 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:12,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-01-10 06:46:12,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2022-01-10 06:46:12,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 217 states have (on average 1.368663594470046) internal successors, (297), 221 states have internal predecessors, (297), 46 states have call successors, (46), 10 states have call predecessors, (46), 10 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-01-10 06:46:12,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 389 transitions. [2022-01-10 06:46:12,361 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 389 transitions. Word has length 139 [2022-01-10 06:46:12,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:12,362 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 389 transitions. [2022-01-10 06:46:12,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:46:12,362 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 389 transitions. [2022-01-10 06:46:12,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-10 06:46:12,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:12,366 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 06:46:12,389 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 06:46:12,603 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 06:46:12,603 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:12,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:12,604 INFO L85 PathProgramCache]: Analyzing trace with hash 2084962764, now seen corresponding path program 1 times [2022-01-10 06:46:12,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:12,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997358884] [2022-01-10 06:46:12,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:12,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:12,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:12,611 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 06:46:12,612 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 06:46:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:12,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:12,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:12,886 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-01-10 06:46:12,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:12,886 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:12,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997358884] [2022-01-10 06:46:12,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997358884] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:12,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:12,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:12,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796197775] [2022-01-10 06:46:12,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:12,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:12,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:12,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:12,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:12,887 INFO L87 Difference]: Start difference. First operand 274 states and 389 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:46:12,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:12,929 INFO L93 Difference]: Finished difference Result 493 states and 715 transitions. [2022-01-10 06:46:12,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:12,929 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 143 [2022-01-10 06:46:12,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:12,930 INFO L225 Difference]: With dead ends: 493 [2022-01-10 06:46:12,931 INFO L226 Difference]: Without dead ends: 255 [2022-01-10 06:46:12,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 141 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 06:46:12,931 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 30 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:12,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 754 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:12,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-01-10 06:46:12,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2022-01-10 06:46:12,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 201 states have (on average 1.36318407960199) internal successors, (274), 205 states have internal predecessors, (274), 43 states have call successors, (43), 10 states have call predecessors, (43), 10 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-01-10 06:46:12,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 360 transitions. [2022-01-10 06:46:12,938 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 360 transitions. Word has length 143 [2022-01-10 06:46:12,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:12,938 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 360 transitions. [2022-01-10 06:46:12,938 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:46:12,938 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 360 transitions. [2022-01-10 06:46:12,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-10 06:46:12,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:12,939 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 06:46:12,953 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 06:46:13,146 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 06:46:13,146 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:13,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:13,146 INFO L85 PathProgramCache]: Analyzing trace with hash 599408529, now seen corresponding path program 1 times [2022-01-10 06:46:13,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:13,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272688393] [2022-01-10 06:46:13,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:13,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:13,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:13,148 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 06:46:13,190 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 06:46:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:13,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:13,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-01-10 06:46:13,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:13,451 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:13,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272688393] [2022-01-10 06:46:13,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272688393] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:13,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:13,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:13,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452573617] [2022-01-10 06:46:13,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:13,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:13,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:13,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:13,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:13,453 INFO L87 Difference]: Start difference. First operand 255 states and 360 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:46:13,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:13,493 INFO L93 Difference]: Finished difference Result 472 states and 679 transitions. [2022-01-10 06:46:13,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:13,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-01-10 06:46:13,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:13,495 INFO L225 Difference]: With dead ends: 472 [2022-01-10 06:46:13,495 INFO L226 Difference]: Without dead ends: 275 [2022-01-10 06:46:13,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 144 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 06:46:13,496 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 39 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:13,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 742 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:13,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-01-10 06:46:13,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-01-10 06:46:13,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 220 states have (on average 1.3363636363636364) internal successors, (294), 224 states have internal predecessors, (294), 43 states have call successors, (43), 11 states have call predecessors, (43), 11 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-01-10 06:46:13,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 380 transitions. [2022-01-10 06:46:13,502 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 380 transitions. Word has length 146 [2022-01-10 06:46:13,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:13,503 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 380 transitions. [2022-01-10 06:46:13,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:46:13,503 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 380 transitions. [2022-01-10 06:46:13,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-10 06:46:13,504 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:13,504 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 06:46:13,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-01-10 06:46:13,711 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 06:46:13,711 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:13,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:13,712 INFO L85 PathProgramCache]: Analyzing trace with hash 906721173, now seen corresponding path program 2 times [2022-01-10 06:46:13,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:13,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338968532] [2022-01-10 06:46:13,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:46:13,712 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:13,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:13,713 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 06:46:13,727 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 06:46:13,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 06:46:13,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:46:13,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:13,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-01-10 06:46:14,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:14,029 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:14,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338968532] [2022-01-10 06:46:14,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338968532] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:14,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:14,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:14,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211516836] [2022-01-10 06:46:14,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:14,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:14,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:14,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:14,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:14,031 INFO L87 Difference]: Start difference. First operand 275 states and 380 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-01-10 06:46:14,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:14,055 INFO L93 Difference]: Finished difference Result 429 states and 612 transitions. [2022-01-10 06:46:14,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:14,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 146 [2022-01-10 06:46:14,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:14,057 INFO L225 Difference]: With dead ends: 429 [2022-01-10 06:46:14,057 INFO L226 Difference]: Without dead ends: 281 [2022-01-10 06:46:14,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 143 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 06:46:14,060 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 6 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 803 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 06:46:14,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 803 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:14,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-01-10 06:46:14,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 279. [2022-01-10 06:46:14,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 223 states have (on average 1.3318385650224216) internal successors, (297), 227 states have internal predecessors, (297), 43 states have call successors, (43), 12 states have call predecessors, (43), 12 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-01-10 06:46:14,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 383 transitions. [2022-01-10 06:46:14,070 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 383 transitions. Word has length 146 [2022-01-10 06:46:14,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:14,070 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 383 transitions. [2022-01-10 06:46:14,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-01-10 06:46:14,070 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 383 transitions. [2022-01-10 06:46:14,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-10 06:46:14,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:14,073 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 06:46:14,097 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 06:46:14,283 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 06:46:14,283 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:14,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:14,284 INFO L85 PathProgramCache]: Analyzing trace with hash -216528285, now seen corresponding path program 1 times [2022-01-10 06:46:14,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:14,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903009665] [2022-01-10 06:46:14,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:14,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:14,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:14,307 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 06:46:14,308 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 06:46:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:14,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:46:14,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-01-10 06:46:14,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:14,554 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:14,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903009665] [2022-01-10 06:46:14,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903009665] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:14,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:14,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:46:14,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001677128] [2022-01-10 06:46:14,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:14,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:46:14,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:14,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:46:14,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:14,555 INFO L87 Difference]: Start difference. First operand 279 states and 383 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:46:14,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:14,573 INFO L93 Difference]: Finished difference Result 475 states and 665 transitions. [2022-01-10 06:46:14,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:14,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 155 [2022-01-10 06:46:14,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:14,574 INFO L225 Difference]: With dead ends: 475 [2022-01-10 06:46:14,574 INFO L226 Difference]: Without dead ends: 281 [2022-01-10 06:46:14,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:14,575 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 0 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:14,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1085 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:14,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-01-10 06:46:14,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 279. [2022-01-10 06:46:14,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 223 states have (on average 1.3183856502242153) internal successors, (294), 227 states have internal predecessors, (294), 43 states have call successors, (43), 12 states have call predecessors, (43), 12 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-01-10 06:46:14,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 380 transitions. [2022-01-10 06:46:14,586 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 380 transitions. Word has length 155 [2022-01-10 06:46:14,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:14,587 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 380 transitions. [2022-01-10 06:46:14,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:46:14,587 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 380 transitions. [2022-01-10 06:46:14,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-10 06:46:14,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:14,588 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 7, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 06:46:14,595 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 06:46:14,795 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 06:46:14,795 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:14,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:14,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1844935847, now seen corresponding path program 1 times [2022-01-10 06:46:14,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:14,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160458053] [2022-01-10 06:46:14,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:14,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:14,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:14,798 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 06:46:14,799 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 06:46:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:14,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:46:14,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:15,122 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2022-01-10 06:46:15,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:15,123 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:15,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160458053] [2022-01-10 06:46:15,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160458053] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:15,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:15,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:46:15,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511884805] [2022-01-10 06:46:15,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:15,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:46:15,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:15,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:46:15,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:15,124 INFO L87 Difference]: Start difference. First operand 279 states and 380 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:46:15,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:15,137 INFO L93 Difference]: Finished difference Result 438 states and 615 transitions. [2022-01-10 06:46:15,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:15,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 188 [2022-01-10 06:46:15,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:15,139 INFO L225 Difference]: With dead ends: 438 [2022-01-10 06:46:15,139 INFO L226 Difference]: Without dead ends: 279 [2022-01-10 06:46:15,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:15,140 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 0 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:15,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1082 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:15,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-01-10 06:46:15,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2022-01-10 06:46:15,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 223 states have (on average 1.304932735426009) internal successors, (291), 227 states have internal predecessors, (291), 43 states have call successors, (43), 12 states have call predecessors, (43), 12 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-01-10 06:46:15,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 377 transitions. [2022-01-10 06:46:15,147 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 377 transitions. Word has length 188 [2022-01-10 06:46:15,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:15,147 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 377 transitions. [2022-01-10 06:46:15,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:46:15,147 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 377 transitions. [2022-01-10 06:46:15,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-10 06:46:15,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:15,149 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 06:46:15,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:15,356 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 06:46:15,357 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:15,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:15,357 INFO L85 PathProgramCache]: Analyzing trace with hash -699308438, now seen corresponding path program 1 times [2022-01-10 06:46:15,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:15,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305513402] [2022-01-10 06:46:15,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:15,358 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:15,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:15,359 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 06:46:15,361 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 06:46:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:15,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:15,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:15,735 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 138 proven. 14 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-01-10 06:46:15,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2022-01-10 06:46:16,043 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:16,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305513402] [2022-01-10 06:46:16,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305513402] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 06:46:16,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:46:16,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-01-10 06:46:16,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025371977] [2022-01-10 06:46:16,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:16,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:16,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:16,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:16,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:16,045 INFO L87 Difference]: Start difference. First operand 279 states and 377 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 06:46:16,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:16,068 INFO L93 Difference]: Finished difference Result 463 states and 644 transitions. [2022-01-10 06:46:16,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:46:16,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 195 [2022-01-10 06:46:16,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:16,069 INFO L225 Difference]: With dead ends: 463 [2022-01-10 06:46:16,069 INFO L226 Difference]: Without dead ends: 279 [2022-01-10 06:46:16,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 385 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 06:46:16,070 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 22 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:16,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 748 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:16,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-01-10 06:46:16,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2022-01-10 06:46:16,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 223 states have (on average 1.2780269058295963) internal successors, (285), 227 states have internal predecessors, (285), 43 states have call successors, (43), 12 states have call predecessors, (43), 12 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-01-10 06:46:16,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 371 transitions. [2022-01-10 06:46:16,076 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 371 transitions. Word has length 195 [2022-01-10 06:46:16,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:16,076 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 371 transitions. [2022-01-10 06:46:16,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 06:46:16,077 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 371 transitions. [2022-01-10 06:46:16,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-10 06:46:16,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:16,078 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 06:46:16,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:16,278 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 06:46:16,279 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:16,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:16,279 INFO L85 PathProgramCache]: Analyzing trace with hash -855668969, now seen corresponding path program 1 times [2022-01-10 06:46:16,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:16,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687303036] [2022-01-10 06:46:16,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:16,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:16,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:16,281 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 06:46:16,298 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 06:46:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:16,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:16,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-01-10 06:46:16,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:16,706 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:16,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687303036] [2022-01-10 06:46:16,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687303036] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:16,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:16,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:16,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497572016] [2022-01-10 06:46:16,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:16,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:16,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:16,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:16,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:16,707 INFO L87 Difference]: Start difference. First operand 279 states and 371 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-01-10 06:46:16,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:16,735 INFO L93 Difference]: Finished difference Result 438 states and 607 transitions. [2022-01-10 06:46:16,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:16,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 219 [2022-01-10 06:46:16,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:16,737 INFO L225 Difference]: With dead ends: 438 [2022-01-10 06:46:16,737 INFO L226 Difference]: Without dead ends: 286 [2022-01-10 06:46:16,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 217 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 06:46:16,738 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 7 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:16,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 799 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:16,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-01-10 06:46:16,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2022-01-10 06:46:16,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 227 states have (on average 1.2731277533039647) internal successors, (289), 231 states have internal predecessors, (289), 43 states have call successors, (43), 13 states have call predecessors, (43), 13 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-01-10 06:46:16,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 375 transitions. [2022-01-10 06:46:16,744 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 375 transitions. Word has length 219 [2022-01-10 06:46:16,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:16,744 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 375 transitions. [2022-01-10 06:46:16,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-01-10 06:46:16,744 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 375 transitions. [2022-01-10 06:46:16,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-01-10 06:46:16,746 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:16,746 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:16,754 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 06:46:16,953 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 06:46:16,954 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:16,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:16,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1462568680, now seen corresponding path program 1 times [2022-01-10 06:46:16,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:16,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848544362] [2022-01-10 06:46:16,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:16,955 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:16,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:16,956 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 06:46:16,959 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 06:46:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:17,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:17,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2022-01-10 06:46:17,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:17,371 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:17,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848544362] [2022-01-10 06:46:17,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848544362] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:17,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:17,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:17,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389580605] [2022-01-10 06:46:17,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:17,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:17,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:17,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:17,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:17,372 INFO L87 Difference]: Start difference. First operand 284 states and 375 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2022-01-10 06:46:17,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:17,393 INFO L93 Difference]: Finished difference Result 440 states and 605 transitions. [2022-01-10 06:46:17,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:46:17,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) Word has length 229 [2022-01-10 06:46:17,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:17,395 INFO L225 Difference]: With dead ends: 440 [2022-01-10 06:46:17,395 INFO L226 Difference]: Without dead ends: 283 [2022-01-10 06:46:17,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 227 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 06:46:17,396 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 7 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 785 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 06:46:17,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 785 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:17,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-10 06:46:17,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2022-01-10 06:46:17,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 227 states have (on average 1.2599118942731278) internal successors, (286), 230 states have internal predecessors, (286), 42 states have call successors, (42), 13 states have call predecessors, (42), 13 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-01-10 06:46:17,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 370 transitions. [2022-01-10 06:46:17,401 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 370 transitions. Word has length 229 [2022-01-10 06:46:17,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:17,402 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 370 transitions. [2022-01-10 06:46:17,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2022-01-10 06:46:17,402 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 370 transitions. [2022-01-10 06:46:17,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-10 06:46:17,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:17,403 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 06:46:17,425 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 06:46:17,611 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 06:46:17,611 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:17,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:17,612 INFO L85 PathProgramCache]: Analyzing trace with hash 888305907, now seen corresponding path program 1 times [2022-01-10 06:46:17,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:17,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514756022] [2022-01-10 06:46:17,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:17,612 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:17,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:17,625 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 06:46:17,627 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 06:46:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:17,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:17,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2022-01-10 06:46:18,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:18,091 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:18,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514756022] [2022-01-10 06:46:18,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514756022] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:18,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:18,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:46:18,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332255580] [2022-01-10 06:46:18,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:18,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:46:18,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:18,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:46:18,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:18,093 INFO L87 Difference]: Start difference. First operand 283 states and 370 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-01-10 06:46:18,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:18,100 INFO L93 Difference]: Finished difference Result 481 states and 666 transitions. [2022-01-10 06:46:18,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:46:18,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 239 [2022-01-10 06:46:18,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:18,102 INFO L225 Difference]: With dead ends: 481 [2022-01-10 06:46:18,102 INFO L226 Difference]: Without dead ends: 325 [2022-01-10 06:46:18,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 237 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 06:46:18,103 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 123 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:18,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 522 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:18,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-01-10 06:46:18,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 282. [2022-01-10 06:46:18,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 227 states have (on average 1.2555066079295154) internal successors, (285), 229 states have internal predecessors, (285), 41 states have call successors, (41), 13 states have call predecessors, (41), 13 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-01-10 06:46:18,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 367 transitions. [2022-01-10 06:46:18,113 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 367 transitions. Word has length 239 [2022-01-10 06:46:18,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:18,113 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 367 transitions. [2022-01-10 06:46:18,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-01-10 06:46:18,114 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 367 transitions. [2022-01-10 06:46:18,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-01-10 06:46:18,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:18,116 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:18,151 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 06:46:18,324 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 06:46:18,324 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:18,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:18,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1279032433, now seen corresponding path program 1 times [2022-01-10 06:46:18,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:18,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1991523261] [2022-01-10 06:46:18,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:18,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:18,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:18,326 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 06:46:18,328 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 06:46:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:18,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:46:18,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2022-01-10 06:46:18,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:18,880 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:18,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1991523261] [2022-01-10 06:46:18,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1991523261] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:18,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:18,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:18,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089145662] [2022-01-10 06:46:18,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:18,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:46:18,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:18,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:46:18,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:18,882 INFO L87 Difference]: Start difference. First operand 282 states and 367 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (13), 3 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 06:46:19,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:19,079 INFO L93 Difference]: Finished difference Result 642 states and 870 transitions. [2022-01-10 06:46:19,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:46:19,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (13), 3 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 240 [2022-01-10 06:46:19,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:19,083 INFO L225 Difference]: With dead ends: 642 [2022-01-10 06:46:19,083 INFO L226 Difference]: Without dead ends: 487 [2022-01-10 06:46:19,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:46:19,084 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 567 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:19,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 850 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:46:19,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-01-10 06:46:19,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 478. [2022-01-10 06:46:19,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 380 states have (on average 1.305263157894737) internal successors, (496), 382 states have internal predecessors, (496), 70 states have call successors, (70), 27 states have call predecessors, (70), 27 states have return successors, (70), 69 states have call predecessors, (70), 70 states have call successors, (70) [2022-01-10 06:46:19,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 636 transitions. [2022-01-10 06:46:19,095 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 636 transitions. Word has length 240 [2022-01-10 06:46:19,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:19,095 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 636 transitions. [2022-01-10 06:46:19,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (13), 3 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 06:46:19,095 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 636 transitions. [2022-01-10 06:46:19,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-01-10 06:46:19,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:19,096 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 9, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:19,120 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 06:46:19,304 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 06:46:19,304 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:19,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:19,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1440781215, now seen corresponding path program 1 times [2022-01-10 06:46:19,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:19,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210515691] [2022-01-10 06:46:19,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:19,305 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:19,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:19,307 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 06:46:19,308 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 06:46:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:19,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:46:19,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2022-01-10 06:46:19,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:19,872 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:19,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210515691] [2022-01-10 06:46:19,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210515691] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:19,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:19,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:46:19,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661432535] [2022-01-10 06:46:19,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:19,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:46:19,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:19,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:46:19,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:19,874 INFO L87 Difference]: Start difference. First operand 478 states and 636 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:46:19,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:19,893 INFO L93 Difference]: Finished difference Result 1071 states and 1469 transitions. [2022-01-10 06:46:19,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:46:19,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 273 [2022-01-10 06:46:19,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:19,896 INFO L225 Difference]: With dead ends: 1071 [2022-01-10 06:46:19,896 INFO L226 Difference]: Without dead ends: 782 [2022-01-10 06:46:19,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 271 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 06:46:19,897 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 168 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 571 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 06:46:19,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 571 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:19,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-01-10 06:46:19,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 688. [2022-01-10 06:46:19,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 546 states have (on average 1.3296703296703296) internal successors, (726), 552 states have internal predecessors, (726), 100 states have call successors, (100), 41 states have call predecessors, (100), 41 states have return successors, (100), 96 states have call predecessors, (100), 100 states have call successors, (100) [2022-01-10 06:46:19,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 926 transitions. [2022-01-10 06:46:19,917 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 926 transitions. Word has length 273 [2022-01-10 06:46:19,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:19,917 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 926 transitions. [2022-01-10 06:46:19,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:46:19,917 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 926 transitions. [2022-01-10 06:46:19,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-01-10 06:46:19,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:19,919 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 9, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:19,945 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 06:46:20,130 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 06:46:20,130 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:20,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:20,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1894509391, now seen corresponding path program 1 times [2022-01-10 06:46:20,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:20,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256944323] [2022-01-10 06:46:20,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:20,131 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:20,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:20,132 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 06:46:20,134 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 06:46:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:20,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:46:20,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-01-10 06:46:20,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:20,588 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:20,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256944323] [2022-01-10 06:46:20,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256944323] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:20,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:20,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:46:20,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743028456] [2022-01-10 06:46:20,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:20,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:46:20,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:20,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:46:20,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:20,589 INFO L87 Difference]: Start difference. First operand 688 states and 926 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:46:20,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:20,640 INFO L93 Difference]: Finished difference Result 1593 states and 2197 transitions. [2022-01-10 06:46:20,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:46:20,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 274 [2022-01-10 06:46:20,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:20,644 INFO L225 Difference]: With dead ends: 1593 [2022-01-10 06:46:20,644 INFO L226 Difference]: Without dead ends: 1140 [2022-01-10 06:46:20,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 272 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 06:46:20,645 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 174 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 588 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 06:46:20,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 588 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:20,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-01-10 06:46:20,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 1051. [2022-01-10 06:46:20,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 829 states have (on average 1.3474065138721352) internal successors, (1117), 843 states have internal predecessors, (1117), 154 states have call successors, (154), 67 states have call predecessors, (154), 67 states have return successors, (154), 144 states have call predecessors, (154), 154 states have call successors, (154) [2022-01-10 06:46:20,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1425 transitions. [2022-01-10 06:46:20,704 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1425 transitions. Word has length 274 [2022-01-10 06:46:20,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:20,704 INFO L470 AbstractCegarLoop]: Abstraction has 1051 states and 1425 transitions. [2022-01-10 06:46:20,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:46:20,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1425 transitions. [2022-01-10 06:46:20,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-01-10 06:46:20,706 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:20,706 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 9, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 06:46:20,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:20,917 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 06:46:20,918 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:20,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:20,918 INFO L85 PathProgramCache]: Analyzing trace with hash -58219654, now seen corresponding path program 1 times [2022-01-10 06:46:20,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:20,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457388674] [2022-01-10 06:46:20,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:20,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:20,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:20,920 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 06:46:20,921 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 06:46:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:21,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:46:21,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2022-01-10 06:46:21,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:21,307 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:21,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457388674] [2022-01-10 06:46:21,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457388674] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:21,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:21,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:46:21,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539229700] [2022-01-10 06:46:21,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:21,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:46:21,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:21,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:46:21,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:21,309 INFO L87 Difference]: Start difference. First operand 1051 states and 1425 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 06:46:21,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:21,354 INFO L93 Difference]: Finished difference Result 2395 states and 3315 transitions. [2022-01-10 06:46:21,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:46:21,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 275 [2022-01-10 06:46:21,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:21,361 INFO L225 Difference]: With dead ends: 2395 [2022-01-10 06:46:21,361 INFO L226 Difference]: Without dead ends: 1732 [2022-01-10 06:46:21,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 273 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 06:46:21,363 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 183 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 607 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 06:46:21,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 607 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:21,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2022-01-10 06:46:21,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1631. [2022-01-10 06:46:21,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1277 states have (on average 1.3664839467501957) internal successors, (1745), 1305 states have internal predecessors, (1745), 246 states have call successors, (246), 107 states have call predecessors, (246), 107 states have return successors, (246), 226 states have call predecessors, (246), 246 states have call successors, (246) [2022-01-10 06:46:21,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 2237 transitions. [2022-01-10 06:46:21,411 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 2237 transitions. Word has length 275 [2022-01-10 06:46:21,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:21,413 INFO L470 AbstractCegarLoop]: Abstraction has 1631 states and 2237 transitions. [2022-01-10 06:46:21,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 06:46:21,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 2237 transitions. [2022-01-10 06:46:21,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-01-10 06:46:21,415 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:21,415 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 9, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 06:46:21,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-01-10 06:46:21,623 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 06:46:21,623 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:21,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:21,624 INFO L85 PathProgramCache]: Analyzing trace with hash -452586440, now seen corresponding path program 1 times [2022-01-10 06:46:21,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:21,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228543928] [2022-01-10 06:46:21,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:21,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:21,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:21,626 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 06:46:21,628 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 06:46:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:21,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:46:21,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:22,083 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2022-01-10 06:46:22,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:22,084 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:22,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228543928] [2022-01-10 06:46:22,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228543928] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:22,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:22,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:46:22,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990026298] [2022-01-10 06:46:22,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:22,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:46:22,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:22,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:46:22,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:22,085 INFO L87 Difference]: Start difference. First operand 1631 states and 2237 transitions. Second operand has 5 states, 4 states have (on average 25.25) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:46:22,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:22,146 INFO L93 Difference]: Finished difference Result 2618 states and 3627 transitions. [2022-01-10 06:46:22,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:22,147 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 25.25) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 275 [2022-01-10 06:46:22,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:22,153 INFO L225 Difference]: With dead ends: 2618 [2022-01-10 06:46:22,154 INFO L226 Difference]: Without dead ends: 1598 [2022-01-10 06:46:22,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:46:22,173 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 2 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:22,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1013 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:22,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1598 states. [2022-01-10 06:46:22,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1598 to 1598. [2022-01-10 06:46:22,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1249 states have (on average 1.3626901521216974) internal successors, (1702), 1274 states have internal predecessors, (1702), 244 states have call successors, (244), 105 states have call predecessors, (244), 104 states have return successors, (243), 225 states have call predecessors, (243), 243 states have call successors, (243) [2022-01-10 06:46:22,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 2189 transitions. [2022-01-10 06:46:22,221 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 2189 transitions. Word has length 275 [2022-01-10 06:46:22,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:22,222 INFO L470 AbstractCegarLoop]: Abstraction has 1598 states and 2189 transitions. [2022-01-10 06:46:22,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 25.25) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:46:22,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 2189 transitions. [2022-01-10 06:46:22,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-01-10 06:46:22,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:22,226 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 9, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:22,253 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 06:46:22,435 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 06:46:22,435 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:22,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:22,435 INFO L85 PathProgramCache]: Analyzing trace with hash -258258846, now seen corresponding path program 1 times [2022-01-10 06:46:22,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:22,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942061671] [2022-01-10 06:46:22,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:22,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:22,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:22,437 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 06:46:22,463 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 06:46:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:22,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:46:22,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:23,006 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2022-01-10 06:46:23,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:23,007 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:23,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942061671] [2022-01-10 06:46:23,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942061671] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:23,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:23,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:23,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698178878] [2022-01-10 06:46:23,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:23,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:46:23,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:23,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:46:23,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:23,009 INFO L87 Difference]: Start difference. First operand 1598 states and 2189 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-01-10 06:46:23,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:23,187 INFO L93 Difference]: Finished difference Result 3075 states and 4223 transitions. [2022-01-10 06:46:23,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:23,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 279 [2022-01-10 06:46:23,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:23,193 INFO L225 Difference]: With dead ends: 3075 [2022-01-10 06:46:23,193 INFO L226 Difference]: Without dead ends: 1698 [2022-01-10 06:46:23,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:23,195 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 230 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:23,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 466 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:46:23,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2022-01-10 06:46:23,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1119. [2022-01-10 06:46:23,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 894 states have (on average 1.3232662192393736) internal successors, (1183), 909 states have internal predecessors, (1183), 146 states have call successors, (146), 79 states have call predecessors, (146), 78 states have return successors, (145), 137 states have call predecessors, (145), 145 states have call successors, (145) [2022-01-10 06:46:23,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1474 transitions. [2022-01-10 06:46:23,287 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1474 transitions. Word has length 279 [2022-01-10 06:46:23,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:23,287 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 1474 transitions. [2022-01-10 06:46:23,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-01-10 06:46:23,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1474 transitions. [2022-01-10 06:46:23,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-01-10 06:46:23,289 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:23,289 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 9, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:23,313 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 06:46:23,496 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 06:46:23,496 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:23,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:23,497 INFO L85 PathProgramCache]: Analyzing trace with hash 473708580, now seen corresponding path program 1 times [2022-01-10 06:46:23,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:23,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2062643587] [2022-01-10 06:46:23,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:23,497 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:23,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:23,498 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 06:46:23,500 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 06:46:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:23,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:23,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:23,905 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2022-01-10 06:46:23,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:23,906 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:23,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2062643587] [2022-01-10 06:46:23,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2062643587] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:23,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:23,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:23,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729608270] [2022-01-10 06:46:23,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:23,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:23,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:23,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:23,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:23,907 INFO L87 Difference]: Start difference. First operand 1119 states and 1474 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:46:23,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:23,994 INFO L93 Difference]: Finished difference Result 2252 states and 2981 transitions. [2022-01-10 06:46:23,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:23,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 279 [2022-01-10 06:46:23,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:23,998 INFO L225 Difference]: With dead ends: 2252 [2022-01-10 06:46:23,998 INFO L226 Difference]: Without dead ends: 1116 [2022-01-10 06:46:24,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 276 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 06:46:24,001 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 33 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:24,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 699 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:46:24,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-01-10 06:46:24,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1116. [2022-01-10 06:46:24,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 891 states have (on average 1.3041526374859709) internal successors, (1162), 906 states have internal predecessors, (1162), 146 states have call successors, (146), 79 states have call predecessors, (146), 78 states have return successors, (145), 137 states have call predecessors, (145), 145 states have call successors, (145) [2022-01-10 06:46:24,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 1453 transitions. [2022-01-10 06:46:24,024 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 1453 transitions. Word has length 279 [2022-01-10 06:46:24,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:24,025 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 1453 transitions. [2022-01-10 06:46:24,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:46:24,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 1453 transitions. [2022-01-10 06:46:24,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-01-10 06:46:24,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:24,027 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 9, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 06:46:24,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:24,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:24,234 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:24,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:24,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1459699789, now seen corresponding path program 1 times [2022-01-10 06:46:24,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:24,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425255552] [2022-01-10 06:46:24,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:24,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:24,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:24,256 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:24,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 06:46:24,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:24,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 06:46:24,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 54 proven. 100 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2022-01-10 06:46:24,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2022-01-10 06:46:25,383 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:25,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425255552] [2022-01-10 06:46:25,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425255552] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:25,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:25,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2022-01-10 06:46:25,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842034885] [2022-01-10 06:46:25,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:25,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 06:46:25,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:25,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 06:46:25,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-01-10 06:46:25,385 INFO L87 Difference]: Start difference. First operand 1116 states and 1453 transitions. Second operand has 21 states, 21 states have (on average 7.666666666666667) internal successors, (161), 18 states have internal predecessors, (161), 5 states have call successors, (35), 8 states have call predecessors, (35), 12 states have return successors, (35), 7 states have call predecessors, (35), 5 states have call successors, (35) [2022-01-10 06:46:26,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:26,849 INFO L93 Difference]: Finished difference Result 2234 states and 3066 transitions. [2022-01-10 06:46:26,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 06:46:26,859 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.666666666666667) internal successors, (161), 18 states have internal predecessors, (161), 5 states have call successors, (35), 8 states have call predecessors, (35), 12 states have return successors, (35), 7 states have call predecessors, (35), 5 states have call successors, (35) Word has length 280 [2022-01-10 06:46:26,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:26,863 INFO L225 Difference]: With dead ends: 2234 [2022-01-10 06:46:26,863 INFO L226 Difference]: Without dead ends: 1516 [2022-01-10 06:46:26,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 544 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 06:46:26,865 INFO L933 BasicCegarLoop]: 400 mSDtfsCounter, 763 mSDsluCounter, 4088 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 4488 SdHoareTripleChecker+Invalid, 2595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:26,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [801 Valid, 4488 Invalid, 2595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 06:46:26,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2022-01-10 06:46:26,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1078. [2022-01-10 06:46:26,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 862 states have (on average 1.296983758700696) internal successors, (1118), 877 states have internal predecessors, (1118), 138 states have call successors, (138), 76 states have call predecessors, (138), 77 states have return successors, (141), 131 states have call predecessors, (141), 137 states have call successors, (141) [2022-01-10 06:46:26,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1397 transitions. [2022-01-10 06:46:26,899 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1397 transitions. Word has length 280 [2022-01-10 06:46:26,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:26,899 INFO L470 AbstractCegarLoop]: Abstraction has 1078 states and 1397 transitions. [2022-01-10 06:46:26,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.666666666666667) internal successors, (161), 18 states have internal predecessors, (161), 5 states have call successors, (35), 8 states have call predecessors, (35), 12 states have return successors, (35), 7 states have call predecessors, (35), 5 states have call successors, (35) [2022-01-10 06:46:26,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1397 transitions. [2022-01-10 06:46:26,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-01-10 06:46:26,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:26,901 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 9, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 06:46:26,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:27,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:27,109 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:27,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:27,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1873653490, now seen corresponding path program 1 times [2022-01-10 06:46:27,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:27,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852775846] [2022-01-10 06:46:27,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:27,110 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:27,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:27,111 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:27,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 06:46:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:27,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:27,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2022-01-10 06:46:27,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:27,561 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:27,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852775846] [2022-01-10 06:46:27,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852775846] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:27,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:27,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:27,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368853562] [2022-01-10 06:46:27,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:27,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:27,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:27,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:27,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:27,563 INFO L87 Difference]: Start difference. First operand 1078 states and 1397 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:46:27,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:27,638 INFO L93 Difference]: Finished difference Result 1801 states and 2389 transitions. [2022-01-10 06:46:27,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:27,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 280 [2022-01-10 06:46:27,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:27,642 INFO L225 Difference]: With dead ends: 1801 [2022-01-10 06:46:27,642 INFO L226 Difference]: Without dead ends: 1070 [2022-01-10 06:46:27,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 278 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 06:46:27,643 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 30 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:27,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 699 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:46:27,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-01-10 06:46:27,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 1070. [2022-01-10 06:46:27,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 856 states have (on average 1.2827102803738317) internal successors, (1098), 871 states have internal predecessors, (1098), 138 states have call successors, (138), 76 states have call predecessors, (138), 75 states have return successors, (137), 129 states have call predecessors, (137), 137 states have call successors, (137) [2022-01-10 06:46:27,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1373 transitions. [2022-01-10 06:46:27,671 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1373 transitions. Word has length 280 [2022-01-10 06:46:27,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:27,671 INFO L470 AbstractCegarLoop]: Abstraction has 1070 states and 1373 transitions. [2022-01-10 06:46:27,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:46:27,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1373 transitions. [2022-01-10 06:46:27,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-10 06:46:27,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:27,673 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 9, 7, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 06:46:27,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:27,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:27,881 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:27,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:27,881 INFO L85 PathProgramCache]: Analyzing trace with hash 669747496, now seen corresponding path program 1 times [2022-01-10 06:46:27,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:27,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752843432] [2022-01-10 06:46:27,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:27,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:27,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:27,886 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:27,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-01-10 06:46:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:28,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 06:46:28,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 263 proven. 113 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-01-10 06:46:28,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 65 proven. 126 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2022-01-10 06:46:29,167 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:29,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752843432] [2022-01-10 06:46:29,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752843432] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:29,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:29,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2022-01-10 06:46:29,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212252451] [2022-01-10 06:46:29,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:29,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 06:46:29,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:29,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 06:46:29,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-01-10 06:46:29,169 INFO L87 Difference]: Start difference. First operand 1070 states and 1373 transitions. Second operand has 21 states, 21 states have (on average 8.095238095238095) internal successors, (170), 18 states have internal predecessors, (170), 5 states have call successors, (35), 8 states have call predecessors, (35), 14 states have return successors, (35), 7 states have call predecessors, (35), 5 states have call successors, (35) [2022-01-10 06:46:30,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:30,437 INFO L93 Difference]: Finished difference Result 2037 states and 2733 transitions. [2022-01-10 06:46:30,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 06:46:30,438 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 8.095238095238095) internal successors, (170), 18 states have internal predecessors, (170), 5 states have call successors, (35), 8 states have call predecessors, (35), 14 states have return successors, (35), 7 states have call predecessors, (35), 5 states have call successors, (35) Word has length 290 [2022-01-10 06:46:30,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:30,441 INFO L225 Difference]: With dead ends: 2037 [2022-01-10 06:46:30,441 INFO L226 Difference]: Without dead ends: 1372 [2022-01-10 06:46:30,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 564 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 06:46:30,443 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 862 mSDsluCounter, 3055 mSDsCounter, 0 mSdLazyCounter, 2085 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 3409 SdHoareTripleChecker+Invalid, 2427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 2085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:30,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 3409 Invalid, 2427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 2085 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 06:46:30,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2022-01-10 06:46:30,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1076. [2022-01-10 06:46:30,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 861 states have (on average 1.278745644599303) internal successors, (1101), 876 states have internal predecessors, (1101), 138 states have call successors, (138), 77 states have call predecessors, (138), 76 states have return successors, (137), 129 states have call predecessors, (137), 137 states have call successors, (137) [2022-01-10 06:46:30,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1376 transitions. [2022-01-10 06:46:30,479 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1376 transitions. Word has length 290 [2022-01-10 06:46:30,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:30,480 INFO L470 AbstractCegarLoop]: Abstraction has 1076 states and 1376 transitions. [2022-01-10 06:46:30,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.095238095238095) internal successors, (170), 18 states have internal predecessors, (170), 5 states have call successors, (35), 8 states have call predecessors, (35), 14 states have return successors, (35), 7 states have call predecessors, (35), 5 states have call successors, (35) [2022-01-10 06:46:30,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1376 transitions. [2022-01-10 06:46:30,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-01-10 06:46:30,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:30,481 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 9, 8, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 06:46:30,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:30,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:30,689 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:30,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:30,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1207273797, now seen corresponding path program 1 times [2022-01-10 06:46:30,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:30,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714286787] [2022-01-10 06:46:30,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:30,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:30,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:30,691 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:30,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-01-10 06:46:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:30,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 06:46:30,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 373 proven. 82 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2022-01-10 06:46:31,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 119 proven. 80 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2022-01-10 06:46:31,747 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:31,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714286787] [2022-01-10 06:46:31,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714286787] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:31,747 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:31,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2022-01-10 06:46:31,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178553994] [2022-01-10 06:46:31,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:31,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 06:46:31,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:31,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 06:46:31,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-01-10 06:46:31,749 INFO L87 Difference]: Start difference. First operand 1076 states and 1376 transitions. Second operand has 19 states, 19 states have (on average 8.842105263157896) internal successors, (168), 16 states have internal predecessors, (168), 5 states have call successors, (35), 6 states have call predecessors, (35), 12 states have return successors, (35), 7 states have call predecessors, (35), 5 states have call successors, (35) [2022-01-10 06:46:32,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:32,894 INFO L93 Difference]: Finished difference Result 2128 states and 2837 transitions. [2022-01-10 06:46:32,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 06:46:32,894 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 8.842105263157896) internal successors, (168), 16 states have internal predecessors, (168), 5 states have call successors, (35), 6 states have call predecessors, (35), 12 states have return successors, (35), 7 states have call predecessors, (35), 5 states have call successors, (35) Word has length 301 [2022-01-10 06:46:32,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:32,899 INFO L225 Difference]: With dead ends: 2128 [2022-01-10 06:46:32,899 INFO L226 Difference]: Without dead ends: 1463 [2022-01-10 06:46:32,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 587 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 06:46:32,901 INFO L933 BasicCegarLoop]: 402 mSDtfsCounter, 800 mSDsluCounter, 2790 mSDsCounter, 0 mSdLazyCounter, 1925 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 3192 SdHoareTripleChecker+Invalid, 2183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:32,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [823 Valid, 3192 Invalid, 2183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1925 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 06:46:32,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2022-01-10 06:46:32,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 989. [2022-01-10 06:46:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 799 states have (on average 1.2728410513141426) internal successors, (1017), 812 states have internal predecessors, (1017), 118 states have call successors, (118), 72 states have call predecessors, (118), 71 states have return successors, (117), 111 states have call predecessors, (117), 117 states have call successors, (117) [2022-01-10 06:46:32,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1252 transitions. [2022-01-10 06:46:32,936 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1252 transitions. Word has length 301 [2022-01-10 06:46:32,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:32,937 INFO L470 AbstractCegarLoop]: Abstraction has 989 states and 1252 transitions. [2022-01-10 06:46:32,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.842105263157896) internal successors, (168), 16 states have internal predecessors, (168), 5 states have call successors, (35), 6 states have call predecessors, (35), 12 states have return successors, (35), 7 states have call predecessors, (35), 5 states have call successors, (35) [2022-01-10 06:46:32,937 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1252 transitions. [2022-01-10 06:46:32,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-01-10 06:46:32,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:32,939 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 9, 8, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:32,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:33,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:33,147 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:33,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:33,147 INFO L85 PathProgramCache]: Analyzing trace with hash -870893653, now seen corresponding path program 1 times [2022-01-10 06:46:33,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:33,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755050621] [2022-01-10 06:46:33,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:33,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:33,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:33,149 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:33,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-01-10 06:46:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:33,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:46:33,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2022-01-10 06:46:33,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:33,733 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:33,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755050621] [2022-01-10 06:46:33,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [755050621] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:33,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:33,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:46:33,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022733428] [2022-01-10 06:46:33,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:33,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:46:33,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:33,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:46:33,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:46:33,735 INFO L87 Difference]: Start difference. First operand 989 states and 1252 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2022-01-10 06:46:33,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:33,960 INFO L93 Difference]: Finished difference Result 2698 states and 3877 transitions. [2022-01-10 06:46:33,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:46:33,961 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 310 [2022-01-10 06:46:33,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:33,968 INFO L225 Difference]: With dead ends: 2698 [2022-01-10 06:46:33,968 INFO L226 Difference]: Without dead ends: 2110 [2022-01-10 06:46:33,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:46:33,969 INFO L933 BasicCegarLoop]: 717 mSDtfsCounter, 368 mSDsluCounter, 2220 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 2937 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:33,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 2937 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:46:33,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2022-01-10 06:46:34,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1034. [2022-01-10 06:46:34,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 835 states have (on average 1.280239520958084) internal successors, (1069), 848 states have internal predecessors, (1069), 127 states have call successors, (127), 72 states have call predecessors, (127), 71 states have return successors, (126), 120 states have call predecessors, (126), 126 states have call successors, (126) [2022-01-10 06:46:34,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1322 transitions. [2022-01-10 06:46:34,013 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1322 transitions. Word has length 310 [2022-01-10 06:46:34,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:34,013 INFO L470 AbstractCegarLoop]: Abstraction has 1034 states and 1322 transitions. [2022-01-10 06:46:34,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2022-01-10 06:46:34,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1322 transitions. [2022-01-10 06:46:34,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-01-10 06:46:34,015 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:34,015 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 9, 8, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:34,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-01-10 06:46:34,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:34,223 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:34,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:34,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1593658663, now seen corresponding path program 1 times [2022-01-10 06:46:34,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:34,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279410480] [2022-01-10 06:46:34,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:34,224 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:34,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:34,225 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:34,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-01-10 06:46:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:34,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:46:34,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:35,107 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 27 proven. 174 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2022-01-10 06:46:35,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2022-01-10 06:46:35,609 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:35,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279410480] [2022-01-10 06:46:35,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279410480] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:35,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:35,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-01-10 06:46:35,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528303658] [2022-01-10 06:46:35,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:35,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 06:46:35,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:35,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 06:46:35,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-01-10 06:46:35,611 INFO L87 Difference]: Start difference. First operand 1034 states and 1322 transitions. Second operand has 19 states, 19 states have (on average 11.631578947368421) internal successors, (221), 17 states have internal predecessors, (221), 7 states have call successors, (41), 5 states have call predecessors, (41), 7 states have return successors, (40), 9 states have call predecessors, (40), 7 states have call successors, (40) [2022-01-10 06:46:38,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:38,078 INFO L93 Difference]: Finished difference Result 3824 states and 5360 transitions. [2022-01-10 06:46:38,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-10 06:46:38,079 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 11.631578947368421) internal successors, (221), 17 states have internal predecessors, (221), 7 states have call successors, (41), 5 states have call predecessors, (41), 7 states have return successors, (40), 9 states have call predecessors, (40), 7 states have call successors, (40) Word has length 310 [2022-01-10 06:46:38,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:38,089 INFO L225 Difference]: With dead ends: 3824 [2022-01-10 06:46:38,089 INFO L226 Difference]: Without dead ends: 3192 [2022-01-10 06:46:38,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 607 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=360, Invalid=1896, Unknown=0, NotChecked=0, Total=2256 [2022-01-10 06:46:38,091 INFO L933 BasicCegarLoop]: 407 mSDtfsCounter, 2395 mSDsluCounter, 4390 mSDsCounter, 0 mSdLazyCounter, 2780 mSolverCounterSat, 1334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2404 SdHoareTripleChecker+Valid, 4797 SdHoareTripleChecker+Invalid, 4114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1334 IncrementalHoareTripleChecker+Valid, 2780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:38,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2404 Valid, 4797 Invalid, 4114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1334 Valid, 2780 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-10 06:46:38,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2022-01-10 06:46:38,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 1570. [2022-01-10 06:46:38,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1248 states have (on average 1.2860576923076923) internal successors, (1605), 1268 states have internal predecessors, (1605), 209 states have call successors, (209), 110 states have call predecessors, (209), 112 states have return successors, (244), 198 states have call predecessors, (244), 208 states have call successors, (244) [2022-01-10 06:46:38,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 2058 transitions. [2022-01-10 06:46:38,191 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 2058 transitions. Word has length 310 [2022-01-10 06:46:38,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:38,191 INFO L470 AbstractCegarLoop]: Abstraction has 1570 states and 2058 transitions. [2022-01-10 06:46:38,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.631578947368421) internal successors, (221), 17 states have internal predecessors, (221), 7 states have call successors, (41), 5 states have call predecessors, (41), 7 states have return successors, (40), 9 states have call predecessors, (40), 7 states have call successors, (40) [2022-01-10 06:46:38,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 2058 transitions. [2022-01-10 06:46:38,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-01-10 06:46:38,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:38,193 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 9, 8, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:38,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:38,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:38,400 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:38,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:38,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1814253785, now seen corresponding path program 1 times [2022-01-10 06:46:38,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:38,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397966710] [2022-01-10 06:46:38,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:38,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:38,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:38,403 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:38,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-01-10 06:46:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:38,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:46:38,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:39,019 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 40 proven. 159 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2022-01-10 06:46:39,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2022-01-10 06:46:39,366 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:39,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397966710] [2022-01-10 06:46:39,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397966710] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:39,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:39,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-01-10 06:46:39,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750459227] [2022-01-10 06:46:39,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:39,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 06:46:39,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:39,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 06:46:39,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-01-10 06:46:39,380 INFO L87 Difference]: Start difference. First operand 1570 states and 2058 transitions. Second operand has 19 states, 19 states have (on average 11.421052631578947) internal successors, (217), 17 states have internal predecessors, (217), 7 states have call successors, (41), 5 states have call predecessors, (41), 7 states have return successors, (40), 9 states have call predecessors, (40), 7 states have call successors, (40) [2022-01-10 06:46:42,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:42,648 INFO L93 Difference]: Finished difference Result 6266 states and 8937 transitions. [2022-01-10 06:46:42,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-10 06:46:42,649 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 11.421052631578947) internal successors, (217), 17 states have internal predecessors, (217), 7 states have call successors, (41), 5 states have call predecessors, (41), 7 states have return successors, (40), 9 states have call predecessors, (40), 7 states have call successors, (40) Word has length 310 [2022-01-10 06:46:42,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:42,683 INFO L225 Difference]: With dead ends: 6266 [2022-01-10 06:46:42,684 INFO L226 Difference]: Without dead ends: 5097 [2022-01-10 06:46:42,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 608 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=495, Invalid=2697, Unknown=0, NotChecked=0, Total=3192 [2022-01-10 06:46:42,686 INFO L933 BasicCegarLoop]: 555 mSDtfsCounter, 2355 mSDsluCounter, 6466 mSDsCounter, 0 mSdLazyCounter, 4520 mSolverCounterSat, 1595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2364 SdHoareTripleChecker+Valid, 7021 SdHoareTripleChecker+Invalid, 6115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1595 IncrementalHoareTripleChecker+Valid, 4520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:42,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2364 Valid, 7021 Invalid, 6115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1595 Valid, 4520 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-10 06:46:42,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5097 states. [2022-01-10 06:46:42,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5097 to 2427. [2022-01-10 06:46:42,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 1907 states have (on average 1.2857891976927112) internal successors, (2452), 1942 states have internal predecessors, (2452), 353 states have call successors, (353), 158 states have call predecessors, (353), 166 states have return successors, (460), 333 states have call predecessors, (460), 352 states have call successors, (460) [2022-01-10 06:46:42,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 3265 transitions. [2022-01-10 06:46:42,877 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 3265 transitions. Word has length 310 [2022-01-10 06:46:42,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:42,878 INFO L470 AbstractCegarLoop]: Abstraction has 2427 states and 3265 transitions. [2022-01-10 06:46:42,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.421052631578947) internal successors, (217), 17 states have internal predecessors, (217), 7 states have call successors, (41), 5 states have call predecessors, (41), 7 states have return successors, (40), 9 states have call predecessors, (40), 7 states have call successors, (40) [2022-01-10 06:46:42,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 3265 transitions. [2022-01-10 06:46:42,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-01-10 06:46:42,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:42,883 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 9, 8, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:42,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:43,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:43,092 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:43,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:43,092 INFO L85 PathProgramCache]: Analyzing trace with hash 884855920, now seen corresponding path program 1 times [2022-01-10 06:46:43,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:43,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711814483] [2022-01-10 06:46:43,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:43,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:43,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:43,096 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:43,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-01-10 06:46:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:43,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:43,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2022-01-10 06:46:43,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:43,457 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:43,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711814483] [2022-01-10 06:46:43,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711814483] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:43,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:43,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:43,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358190501] [2022-01-10 06:46:43,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:43,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:43,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:43,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:43,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:43,458 INFO L87 Difference]: Start difference. First operand 2427 states and 3265 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-01-10 06:46:43,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:43,641 INFO L93 Difference]: Finished difference Result 4681 states and 6326 transitions. [2022-01-10 06:46:43,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:43,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 311 [2022-01-10 06:46:43,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:43,661 INFO L225 Difference]: With dead ends: 4681 [2022-01-10 06:46:43,661 INFO L226 Difference]: Without dead ends: 2384 [2022-01-10 06:46:43,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 309 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 06:46:43,666 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 8 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:43,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 716 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:43,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2022-01-10 06:46:43,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2384. [2022-01-10 06:46:43,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2384 states, 1875 states have (on average 1.2677333333333334) internal successors, (2377), 1916 states have internal predecessors, (2377), 338 states have call successors, (338), 171 states have call predecessors, (338), 170 states have return successors, (337), 303 states have call predecessors, (337), 337 states have call successors, (337) [2022-01-10 06:46:43,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 3052 transitions. [2022-01-10 06:46:43,816 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 3052 transitions. Word has length 311 [2022-01-10 06:46:43,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:43,817 INFO L470 AbstractCegarLoop]: Abstraction has 2384 states and 3052 transitions. [2022-01-10 06:46:43,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-01-10 06:46:43,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 3052 transitions. [2022-01-10 06:46:43,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-01-10 06:46:43,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:43,819 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 9, 8, 8, 8, 8, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:43,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:44,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:44,032 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:44,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:44,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1809884753, now seen corresponding path program 1 times [2022-01-10 06:46:44,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:44,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299668268] [2022-01-10 06:46:44,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:44,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:44,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:44,034 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:44,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-01-10 06:46:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:44,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:46:44,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2022-01-10 06:46:44,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:44,671 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:44,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299668268] [2022-01-10 06:46:44,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [299668268] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:44,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:44,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:46:44,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877503912] [2022-01-10 06:46:44,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:44,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:46:44,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:44,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:46:44,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:46:44,673 INFO L87 Difference]: Start difference. First operand 2384 states and 3052 transitions. Second operand has 6 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2022-01-10 06:46:44,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:44,881 INFO L93 Difference]: Finished difference Result 3668 states and 5028 transitions. [2022-01-10 06:46:44,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:46:44,882 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 328 [2022-01-10 06:46:44,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:44,891 INFO L225 Difference]: With dead ends: 3668 [2022-01-10 06:46:44,892 INFO L226 Difference]: Without dead ends: 3666 [2022-01-10 06:46:44,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 324 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 06:46:44,894 INFO L933 BasicCegarLoop]: 396 mSDtfsCounter, 188 mSDsluCounter, 1396 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1792 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:44,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 1792 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:44,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3666 states. [2022-01-10 06:46:45,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3666 to 2462. [2022-01-10 06:46:45,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 1927 states have (on average 1.260508562532434) internal successors, (2429), 1981 states have internal predecessors, (2429), 351 states have call successors, (351), 184 states have call predecessors, (351), 183 states have return successors, (350), 303 states have call predecessors, (350), 350 states have call successors, (350) [2022-01-10 06:46:45,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 3130 transitions. [2022-01-10 06:46:45,084 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 3130 transitions. Word has length 328 [2022-01-10 06:46:45,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:45,084 INFO L470 AbstractCegarLoop]: Abstraction has 2462 states and 3130 transitions. [2022-01-10 06:46:45,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2022-01-10 06:46:45,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 3130 transitions. [2022-01-10 06:46:45,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2022-01-10 06:46:45,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:45,086 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 9, 8, 8, 8, 8, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:45,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:45,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:45,294 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:45,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:45,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1847334928, now seen corresponding path program 1 times [2022-01-10 06:46:45,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:45,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653403327] [2022-01-10 06:46:45,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:45,295 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:45,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:45,308 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:45,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-01-10 06:46:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:45,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:46:45,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:45,961 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 382 proven. 77 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-01-10 06:46:45,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:46,355 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:46,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653403327] [2022-01-10 06:46:46,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653403327] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 06:46:46,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1567124507] [2022-01-10 06:46:46,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:46,355 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 06:46:46,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 06:46:46,356 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 06:46:46,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-01-10 06:46:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:46,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:46:46,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 382 proven. 77 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-01-10 06:46:47,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:47,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1567124507] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 06:46:47,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:47,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2022-01-10 06:46:47,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305418669] [2022-01-10 06:46:47,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:47,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 06:46:47,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:47,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 06:46:47,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-01-10 06:46:47,380 INFO L87 Difference]: Start difference. First operand 2462 states and 3130 transitions. Second operand has 11 states, 11 states have (on average 13.909090909090908) internal successors, (153), 9 states have internal predecessors, (153), 5 states have call successors, (25), 4 states have call predecessors, (25), 6 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) [2022-01-10 06:46:47,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:47,701 INFO L93 Difference]: Finished difference Result 5059 states and 6521 transitions. [2022-01-10 06:46:47,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:46:47,702 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.909090909090908) internal successors, (153), 9 states have internal predecessors, (153), 5 states have call successors, (25), 4 states have call predecessors, (25), 6 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) Word has length 336 [2022-01-10 06:46:47,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:47,708 INFO L225 Difference]: With dead ends: 5059 [2022-01-10 06:46:47,708 INFO L226 Difference]: Without dead ends: 3003 [2022-01-10 06:46:47,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1041 GetRequests, 1018 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-01-10 06:46:47,712 INFO L933 BasicCegarLoop]: 398 mSDtfsCounter, 328 mSDsluCounter, 2259 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 2657 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:47,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 2657 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:46:47,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2022-01-10 06:46:47,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 2471. [2022-01-10 06:46:47,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 1934 states have (on average 1.2595656670113753) internal successors, (2436), 1988 states have internal predecessors, (2436), 351 states have call successors, (351), 185 states have call predecessors, (351), 185 states have return successors, (351), 304 states have call predecessors, (351), 350 states have call successors, (351) [2022-01-10 06:46:47,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 3138 transitions. [2022-01-10 06:46:47,874 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 3138 transitions. Word has length 336 [2022-01-10 06:46:47,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:47,874 INFO L470 AbstractCegarLoop]: Abstraction has 2471 states and 3138 transitions. [2022-01-10 06:46:47,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.909090909090908) internal successors, (153), 9 states have internal predecessors, (153), 5 states have call successors, (25), 4 states have call predecessors, (25), 6 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) [2022-01-10 06:46:47,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 3138 transitions. [2022-01-10 06:46:47,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2022-01-10 06:46:47,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:47,876 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 9, 8, 8, 8, 8, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:47,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:48,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:48,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-01-10 06:46:48,291 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:48,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:48,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1486018351, now seen corresponding path program 1 times [2022-01-10 06:46:48,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:48,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623677346] [2022-01-10 06:46:48,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:48,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:48,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:48,293 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:48,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-01-10 06:46:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:48,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:48,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2022-01-10 06:46:48,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:48,858 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:48,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [623677346] [2022-01-10 06:46:48,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [623677346] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:48,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:48,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:48,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524173177] [2022-01-10 06:46:48,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:48,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:48,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:48,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:48,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:48,860 INFO L87 Difference]: Start difference. First operand 2471 states and 3138 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-01-10 06:46:49,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:49,018 INFO L93 Difference]: Finished difference Result 4554 states and 5836 transitions. [2022-01-10 06:46:49,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:49,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 336 [2022-01-10 06:46:49,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:49,023 INFO L225 Difference]: With dead ends: 4554 [2022-01-10 06:46:49,023 INFO L226 Difference]: Without dead ends: 2455 [2022-01-10 06:46:49,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 334 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 06:46:49,027 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 10 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:49,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 713 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:49,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2022-01-10 06:46:49,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 2455. [2022-01-10 06:46:49,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2455 states, 1923 states have (on average 1.2449297971918876) internal successors, (2394), 1977 states have internal predecessors, (2394), 347 states have call successors, (347), 185 states have call predecessors, (347), 184 states have return successors, (346), 299 states have call predecessors, (346), 346 states have call successors, (346) [2022-01-10 06:46:49,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2455 states to 2455 states and 3087 transitions. [2022-01-10 06:46:49,168 INFO L78 Accepts]: Start accepts. Automaton has 2455 states and 3087 transitions. Word has length 336 [2022-01-10 06:46:49,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:49,169 INFO L470 AbstractCegarLoop]: Abstraction has 2455 states and 3087 transitions. [2022-01-10 06:46:49,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-01-10 06:46:49,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2455 states and 3087 transitions. [2022-01-10 06:46:49,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-01-10 06:46:49,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:49,171 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 10, 9, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:49,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-01-10 06:46:49,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:49,379 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:49,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:49,380 INFO L85 PathProgramCache]: Analyzing trace with hash 13870269, now seen corresponding path program 1 times [2022-01-10 06:46:49,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:49,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659368011] [2022-01-10 06:46:49,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:49,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:49,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:49,384 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:49,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-01-10 06:46:49,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:49,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 06:46:49,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 343 proven. 4 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2022-01-10 06:46:50,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 962 trivial. 0 not checked. [2022-01-10 06:46:50,816 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:50,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659368011] [2022-01-10 06:46:50,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659368011] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:50,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:50,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-01-10 06:46:50,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728872689] [2022-01-10 06:46:50,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:50,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 06:46:50,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:50,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 06:46:50,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-01-10 06:46:50,818 INFO L87 Difference]: Start difference. First operand 2455 states and 3087 transitions. Second operand has 19 states, 19 states have (on average 12.789473684210526) internal successors, (243), 17 states have internal predecessors, (243), 7 states have call successors, (51), 5 states have call predecessors, (51), 7 states have return successors, (50), 9 states have call predecessors, (50), 7 states have call successors, (50) [2022-01-10 06:46:52,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:52,324 INFO L93 Difference]: Finished difference Result 5992 states and 7751 transitions. [2022-01-10 06:46:52,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-10 06:46:52,326 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 12.789473684210526) internal successors, (243), 17 states have internal predecessors, (243), 7 states have call successors, (51), 5 states have call predecessors, (51), 7 states have return successors, (50), 9 states have call predecessors, (50), 7 states have call successors, (50) Word has length 351 [2022-01-10 06:46:52,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:52,337 INFO L225 Difference]: With dead ends: 5992 [2022-01-10 06:46:52,337 INFO L226 Difference]: Without dead ends: 3975 [2022-01-10 06:46:52,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 724 GetRequests, 684 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=358, Invalid=1364, Unknown=0, NotChecked=0, Total=1722 [2022-01-10 06:46:52,343 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 1193 mSDsluCounter, 2878 mSDsCounter, 0 mSdLazyCounter, 1846 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1208 SdHoareTripleChecker+Valid, 3210 SdHoareTripleChecker+Invalid, 2193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 1846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:52,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1208 Valid, 3210 Invalid, 2193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 1846 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 06:46:52,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2022-01-10 06:46:52,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 2831. [2022-01-10 06:46:52,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2831 states, 2218 states have (on average 1.2416591523895402) internal successors, (2754), 2272 states have internal predecessors, (2754), 399 states have call successors, (399), 214 states have call predecessors, (399), 213 states have return successors, (398), 344 states have call predecessors, (398), 398 states have call successors, (398) [2022-01-10 06:46:52,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2831 states to 2831 states and 3551 transitions. [2022-01-10 06:46:52,542 INFO L78 Accepts]: Start accepts. Automaton has 2831 states and 3551 transitions. Word has length 351 [2022-01-10 06:46:52,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:52,542 INFO L470 AbstractCegarLoop]: Abstraction has 2831 states and 3551 transitions. [2022-01-10 06:46:52,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 12.789473684210526) internal successors, (243), 17 states have internal predecessors, (243), 7 states have call successors, (51), 5 states have call predecessors, (51), 7 states have return successors, (50), 9 states have call predecessors, (50), 7 states have call successors, (50) [2022-01-10 06:46:52,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2831 states and 3551 transitions. [2022-01-10 06:46:52,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-01-10 06:46:52,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:52,545 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 9, 8, 8, 8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:46:52,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:52,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:52,750 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:52,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:52,751 INFO L85 PathProgramCache]: Analyzing trace with hash 229338776, now seen corresponding path program 1 times [2022-01-10 06:46:52,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:52,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911382256] [2022-01-10 06:46:52,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:52,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:52,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:52,753 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:52,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-01-10 06:46:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:53,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:46:53,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 240 proven. 41 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2022-01-10 06:46:54,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:54,658 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:54,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911382256] [2022-01-10 06:46:54,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911382256] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 06:46:54,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1243223445] [2022-01-10 06:46:54,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:54,659 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 06:46:54,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 06:46:54,661 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 06:46:54,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-01-10 06:46:54,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:54,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:54,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 916 trivial. 0 not checked. [2022-01-10 06:46:55,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:55,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1243223445] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:55,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:46:55,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2022-01-10 06:46:55,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814829574] [2022-01-10 06:46:55,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:55,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:55,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:55,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:55,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:46:55,173 INFO L87 Difference]: Start difference. First operand 2831 states and 3551 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) [2022-01-10 06:46:55,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:55,361 INFO L93 Difference]: Finished difference Result 5673 states and 7168 transitions. [2022-01-10 06:46:55,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:55,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) Word has length 369 [2022-01-10 06:46:55,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:55,368 INFO L225 Difference]: With dead ends: 5673 [2022-01-10 06:46:55,368 INFO L226 Difference]: Without dead ends: 3372 [2022-01-10 06:46:55,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 885 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:46:55,371 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 187 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:55,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 983 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 101 Unchecked, 0.0s Time] [2022-01-10 06:46:55,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2022-01-10 06:46:55,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 2663. [2022-01-10 06:46:55,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2085 states have (on average 1.2354916067146282) internal successors, (2576), 2139 states have internal predecessors, (2576), 381 states have call successors, (381), 196 states have call predecessors, (381), 196 states have return successors, (381), 327 states have call predecessors, (381), 381 states have call successors, (381) [2022-01-10 06:46:55,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3338 transitions. [2022-01-10 06:46:55,521 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3338 transitions. Word has length 369 [2022-01-10 06:46:55,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:55,521 INFO L470 AbstractCegarLoop]: Abstraction has 2663 states and 3338 transitions. [2022-01-10 06:46:55,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) [2022-01-10 06:46:55,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3338 transitions. [2022-01-10 06:46:55,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2022-01-10 06:46:55,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:55,526 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 10, 10, 10, 9, 8, 8, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:55,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:55,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:55,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:55,928 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:55,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:55,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1556247094, now seen corresponding path program 1 times [2022-01-10 06:46:55,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:55,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047242894] [2022-01-10 06:46:55,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:55,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:55,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:55,934 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:55,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-01-10 06:46:56,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:56,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:46:56,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:57,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 228 proven. 287 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-01-10 06:46:57,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:57,955 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:57,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047242894] [2022-01-10 06:46:57,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1047242894] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 06:46:57,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [249593120] [2022-01-10 06:46:57,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:57,955 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 06:46:57,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 06:46:57,957 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 06:46:57,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-01-10 06:46:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:58,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 06:46:58,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 416 proven. 109 refuted. 0 times theorem prover too weak. 638 trivial. 0 not checked. [2022-01-10 06:46:58,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 42 proven. 77 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2022-01-10 06:46:59,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [249593120] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:59,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 06:46:59,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 14] total 29 [2022-01-10 06:46:59,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592308140] [2022-01-10 06:46:59,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:59,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-10 06:46:59,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:59,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-10 06:46:59,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2022-01-10 06:46:59,606 INFO L87 Difference]: Start difference. First operand 2663 states and 3338 transitions. Second operand has 29 states, 29 states have (on average 13.793103448275861) internal successors, (400), 28 states have internal predecessors, (400), 11 states have call successors, (84), 14 states have call predecessors, (84), 19 states have return successors, (84), 12 states have call predecessors, (84), 11 states have call successors, (84) [2022-01-10 06:47:03,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:03,860 INFO L93 Difference]: Finished difference Result 14461 states and 18841 transitions. [2022-01-10 06:47:03,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-10 06:47:03,861 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 13.793103448275861) internal successors, (400), 28 states have internal predecessors, (400), 11 states have call successors, (84), 14 states have call predecessors, (84), 19 states have return successors, (84), 12 states have call predecessors, (84), 11 states have call successors, (84) Word has length 418 [2022-01-10 06:47:03,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:03,888 INFO L225 Difference]: With dead ends: 14461 [2022-01-10 06:47:03,889 INFO L226 Difference]: Without dead ends: 12339 [2022-01-10 06:47:03,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1556 GetRequests, 1450 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2748 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=983, Invalid=9937, Unknown=0, NotChecked=0, Total=10920 [2022-01-10 06:47:03,895 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 2220 mSDsluCounter, 10948 mSDsCounter, 0 mSdLazyCounter, 5456 mSolverCounterSat, 822 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2270 SdHoareTripleChecker+Valid, 11824 SdHoareTripleChecker+Invalid, 8315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 822 IncrementalHoareTripleChecker+Valid, 5456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2037 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:03,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2270 Valid, 11824 Invalid, 8315 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [822 Valid, 5456 Invalid, 0 Unknown, 2037 Unchecked, 2.3s Time] [2022-01-10 06:47:03,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12339 states. [2022-01-10 06:47:04,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12339 to 4195. [2022-01-10 06:47:04,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4195 states, 3276 states have (on average 1.2371794871794872) internal successors, (4053), 3316 states have internal predecessors, (4053), 637 states have call successors, (637), 281 states have call predecessors, (637), 281 states have return successors, (637), 597 states have call predecessors, (637), 637 states have call successors, (637) [2022-01-10 06:47:04,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4195 states to 4195 states and 5327 transitions. [2022-01-10 06:47:04,291 INFO L78 Accepts]: Start accepts. Automaton has 4195 states and 5327 transitions. Word has length 418 [2022-01-10 06:47:04,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:04,291 INFO L470 AbstractCegarLoop]: Abstraction has 4195 states and 5327 transitions. [2022-01-10 06:47:04,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 13.793103448275861) internal successors, (400), 28 states have internal predecessors, (400), 11 states have call successors, (84), 14 states have call predecessors, (84), 19 states have return successors, (84), 12 states have call predecessors, (84), 11 states have call successors, (84) [2022-01-10 06:47:04,292 INFO L276 IsEmpty]: Start isEmpty. Operand 4195 states and 5327 transitions. [2022-01-10 06:47:04,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2022-01-10 06:47:04,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:04,298 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 10, 10, 10, 9, 8, 8, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:04,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-01-10 06:47:04,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2022-01-10 06:47:04,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-01-10 06:47:04,706 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:04,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:04,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1813390385, now seen corresponding path program 1 times [2022-01-10 06:47:04,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:04,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288667544] [2022-01-10 06:47:04,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:04,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:04,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:04,709 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:47:04,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-01-10 06:47:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:04,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:47:04,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:07,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 229 proven. 281 refuted. 0 times theorem prover too weak. 647 trivial. 0 not checked. [2022-01-10 06:47:07,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:47:07,409 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:07,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288667544] [2022-01-10 06:47:07,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288667544] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 06:47:07,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [252414177] [2022-01-10 06:47:07,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:07,409 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 06:47:07,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 06:47:07,410 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 06:47:07,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-01-10 06:47:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:07,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 06:47:07,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 344 proven. 171 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2022-01-10 06:47:08,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:47:08,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 41 proven. 72 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2022-01-10 06:47:08,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [252414177] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:47:08,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 06:47:08,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 14] total 29 [2022-01-10 06:47:08,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170314343] [2022-01-10 06:47:08,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 06:47:08,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-10 06:47:08,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:08,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-10 06:47:08,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 06:47:08,954 INFO L87 Difference]: Start difference. First operand 4195 states and 5327 transitions. Second operand has 29 states, 29 states have (on average 14.379310344827585) internal successors, (417), 28 states have internal predecessors, (417), 11 states have call successors, (87), 14 states have call predecessors, (87), 19 states have return successors, (87), 12 states have call predecessors, (87), 11 states have call successors, (87) [2022-01-10 06:47:13,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:13,314 INFO L93 Difference]: Finished difference Result 16288 states and 21444 transitions. [2022-01-10 06:47:13,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-10 06:47:13,314 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 14.379310344827585) internal successors, (417), 28 states have internal predecessors, (417), 11 states have call successors, (87), 14 states have call predecessors, (87), 19 states have return successors, (87), 12 states have call predecessors, (87), 11 states have call successors, (87) Word has length 419 [2022-01-10 06:47:13,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:13,395 INFO L225 Difference]: With dead ends: 16288 [2022-01-10 06:47:13,395 INFO L226 Difference]: Without dead ends: 13002 [2022-01-10 06:47:13,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1554 GetRequests, 1445 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3061 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1211, Invalid=10561, Unknown=0, NotChecked=0, Total=11772 [2022-01-10 06:47:13,410 INFO L933 BasicCegarLoop]: 856 mSDtfsCounter, 2096 mSDsluCounter, 11517 mSDsCounter, 0 mSdLazyCounter, 6269 mSolverCounterSat, 737 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2141 SdHoareTripleChecker+Valid, 12373 SdHoareTripleChecker+Invalid, 8762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 737 IncrementalHoareTripleChecker+Valid, 6269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1756 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:13,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2141 Valid, 12373 Invalid, 8762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [737 Valid, 6269 Invalid, 0 Unknown, 1756 Unchecked, 2.2s Time] [2022-01-10 06:47:13,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13002 states. [2022-01-10 06:47:13,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13002 to 6838. [2022-01-10 06:47:13,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6838 states, 5321 states have (on average 1.2354820522458185) internal successors, (6574), 5384 states have internal predecessors, (6574), 1062 states have call successors, (1062), 454 states have call predecessors, (1062), 454 states have return successors, (1062), 999 states have call predecessors, (1062), 1062 states have call successors, (1062) [2022-01-10 06:47:13,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6838 states to 6838 states and 8698 transitions. [2022-01-10 06:47:13,982 INFO L78 Accepts]: Start accepts. Automaton has 6838 states and 8698 transitions. Word has length 419 [2022-01-10 06:47:13,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:13,985 INFO L470 AbstractCegarLoop]: Abstraction has 6838 states and 8698 transitions. [2022-01-10 06:47:13,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 14.379310344827585) internal successors, (417), 28 states have internal predecessors, (417), 11 states have call successors, (87), 14 states have call predecessors, (87), 19 states have return successors, (87), 12 states have call predecessors, (87), 11 states have call successors, (87) [2022-01-10 06:47:13,985 INFO L276 IsEmpty]: Start isEmpty. Operand 6838 states and 8698 transitions. [2022-01-10 06:47:13,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2022-01-10 06:47:13,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:13,999 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 10, 10, 10, 9, 8, 8, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:14,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2022-01-10 06:47:14,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-01-10 06:47:14,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:47:14,413 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:14,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:14,414 INFO L85 PathProgramCache]: Analyzing trace with hash 729763725, now seen corresponding path program 2 times [2022-01-10 06:47:14,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:14,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179391507] [2022-01-10 06:47:14,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:47:14,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:14,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:14,416 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:47:14,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-01-10 06:47:14,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:47:14,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:47:14,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:47:14,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:16,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 228 proven. 281 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-01-10 06:47:16,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:47:16,400 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:16,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179391507] [2022-01-10 06:47:16,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179391507] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 06:47:16,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1743139216] [2022-01-10 06:47:16,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:47:16,401 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 06:47:16,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 06:47:16,402 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 06:47:16,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-01-10 06:47:16,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:47:16,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:47:16,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:47:16,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 984 trivial. 0 not checked. [2022-01-10 06:47:17,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:17,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1743139216] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:17,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:47:17,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 17 [2022-01-10 06:47:17,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173354547] [2022-01-10 06:47:17,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:17,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 06:47:17,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:17,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 06:47:17,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:47:17,165 INFO L87 Difference]: Start difference. First operand 6838 states and 8698 transitions. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 7 states have internal predecessors, (143), 3 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (28), 4 states have call predecessors, (28), 2 states have call successors, (28) [2022-01-10 06:47:18,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:18,318 INFO L93 Difference]: Finished difference Result 15807 states and 20513 transitions. [2022-01-10 06:47:18,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 06:47:18,319 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 7 states have internal predecessors, (143), 3 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (28), 4 states have call predecessors, (28), 2 states have call successors, (28) Word has length 419 [2022-01-10 06:47:18,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:18,346 INFO L225 Difference]: With dead ends: 15807 [2022-01-10 06:47:18,347 INFO L226 Difference]: Without dead ends: 10712 [2022-01-10 06:47:18,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1057 GetRequests, 1028 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2022-01-10 06:47:18,357 INFO L933 BasicCegarLoop]: 385 mSDtfsCounter, 232 mSDsluCounter, 2222 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 2607 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:18,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 2607 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:47:18,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10712 states. [2022-01-10 06:47:19,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10712 to 6895. [2022-01-10 06:47:19,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6895 states, 5364 states have (on average 1.2348993288590604) internal successors, (6624), 5428 states have internal predecessors, (6624), 1071 states have call successors, (1071), 459 states have call predecessors, (1071), 459 states have return successors, (1071), 1007 states have call predecessors, (1071), 1071 states have call successors, (1071) [2022-01-10 06:47:19,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6895 states to 6895 states and 8766 transitions. [2022-01-10 06:47:19,117 INFO L78 Accepts]: Start accepts. Automaton has 6895 states and 8766 transitions. Word has length 419 [2022-01-10 06:47:19,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:19,117 INFO L470 AbstractCegarLoop]: Abstraction has 6895 states and 8766 transitions. [2022-01-10 06:47:19,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 7 states have internal predecessors, (143), 3 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (28), 4 states have call predecessors, (28), 2 states have call successors, (28) [2022-01-10 06:47:19,118 INFO L276 IsEmpty]: Start isEmpty. Operand 6895 states and 8766 transitions. [2022-01-10 06:47:19,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2022-01-10 06:47:19,132 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:19,133 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 10, 10, 10, 9, 9, 8, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:19,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-01-10 06:47:19,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-01-10 06:47:19,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-01-10 06:47:19,547 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:19,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:19,547 INFO L85 PathProgramCache]: Analyzing trace with hash -329544556, now seen corresponding path program 1 times [2022-01-10 06:47:19,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:19,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1401691423] [2022-01-10 06:47:19,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:19,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:19,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:19,549 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:47:19,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-01-10 06:47:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:19,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:47:19,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 429 proven. 0 refuted. 0 times theorem prover too weak. 797 trivial. 0 not checked. [2022-01-10 06:47:20,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:20,201 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:20,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1401691423] [2022-01-10 06:47:20,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1401691423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:20,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:20,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:47:20,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754319178] [2022-01-10 06:47:20,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:20,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:47:20,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:20,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:47:20,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:47:20,202 INFO L87 Difference]: Start difference. First operand 6895 states and 8766 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29)