/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/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf -i ../../../trunk/examples/svcomp/list-simple/sll2c_remove_all_reverse.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 05:27:07,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 05:27:07,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 05:27:07,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 05:27:07,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 05:27:07,858 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 05:27:07,858 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 05:27:07,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 05:27:07,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 05:27:07,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 05:27:07,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 05:27:07,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 05:27:07,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 05:27:07,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 05:27:07,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 05:27:07,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 05:27:07,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 05:27:07,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 05:27:07,867 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 05:27:07,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 05:27:07,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 05:27:07,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 05:27:07,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 05:27:07,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 05:27:07,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 05:27:07,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 05:27:07,891 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 05:27:07,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 05:27:07,892 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 05:27:07,892 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 05:27:07,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 05:27:07,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 05:27:07,907 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 05:27:07,908 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 05:27:07,908 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 05:27:07,909 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 05:27:07,909 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 05:27:07,909 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 05:27:07,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 05:27:07,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 05:27:07,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 05:27:07,914 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 05:27:07,937 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 05:27:07,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 05:27:07,938 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 05:27:07,938 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 05:27:07,939 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 05:27:07,939 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 05:27:07,939 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 05:27:07,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 05:27:07,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 05:27:07,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 05:27:07,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 05:27:07,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 05:27:07,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 05:27:07,941 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 05:27:07,941 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 05:27:07,941 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 05:27:07,941 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 05:27:07,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 05:27:07,941 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 05:27:07,941 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 05:27:07,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 05:27:07,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:27:07,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 05:27:07,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 05:27:07,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 05:27:07,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 05:27:07,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 05:27:07,942 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 05:27:07,942 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 05:27:07,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 05:27:07,943 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 05:27:07,943 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 05:27:07,944 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 05:27:07,944 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 05:27:08,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 05:27:08,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 05:27:08,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 05:27:08,153 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 05:27:08,154 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 05:27:08,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2c_remove_all_reverse.i [2022-01-11 05:27:08,218 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e37356c00/57fa6dadd7ef42acb8ecd309ca157373/FLAG2358e2015 [2022-01-11 05:27:08,653 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 05:27:08,654 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2c_remove_all_reverse.i [2022-01-11 05:27:08,675 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e37356c00/57fa6dadd7ef42acb8ecd309ca157373/FLAG2358e2015 [2022-01-11 05:27:08,688 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e37356c00/57fa6dadd7ef42acb8ecd309ca157373 [2022-01-11 05:27:08,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 05:27:08,692 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 05:27:08,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 05:27:08,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 05:27:08,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 05:27:08,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:27:08" (1/1) ... [2022-01-11 05:27:08,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@288c8b73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:27:08, skipping insertion in model container [2022-01-11 05:27:08,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:27:08" (1/1) ... [2022-01-11 05:27:08,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 05:27:08,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 05:27:09,033 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2c_remove_all_reverse.i[24151,24164] [2022-01-11 05:27:09,035 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:27:09,041 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 05:27:09,089 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2c_remove_all_reverse.i[24151,24164] [2022-01-11 05:27:09,090 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:27:09,114 INFO L208 MainTranslator]: Completed translation [2022-01-11 05:27:09,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:27:09 WrapperNode [2022-01-11 05:27:09,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 05:27:09,116 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 05:27:09,117 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 05:27:09,117 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 05:27:09,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:27:09" (1/1) ... [2022-01-11 05:27:09,155 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:27:09" (1/1) ... [2022-01-11 05:27:09,179 INFO L137 Inliner]: procedures = 129, calls = 36, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 133 [2022-01-11 05:27:09,180 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 05:27:09,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 05:27:09,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 05:27:09,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 05:27:09,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:27:09" (1/1) ... [2022-01-11 05:27:09,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:27:09" (1/1) ... [2022-01-11 05:27:09,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:27:09" (1/1) ... [2022-01-11 05:27:09,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:27:09" (1/1) ... [2022-01-11 05:27:09,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:27:09" (1/1) ... [2022-01-11 05:27:09,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:27:09" (1/1) ... [2022-01-11 05:27:09,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:27:09" (1/1) ... [2022-01-11 05:27:09,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 05:27:09,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 05:27:09,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 05:27:09,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 05:27:09,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:27:09" (1/1) ... [2022-01-11 05:27:09,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:27:09,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:27:09,248 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) [2022-01-11 05:27:09,250 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 [2022-01-11 05:27:09,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-11 05:27:09,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 05:27:09,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-11 05:27:09,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-11 05:27:09,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-11 05:27:09,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-11 05:27:09,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-11 05:27:09,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-01-11 05:27:09,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 05:27:09,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 05:27:09,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 05:27:09,361 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 05:27:09,362 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 05:27:09,584 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 05:27:09,588 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 05:27:09,588 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-11 05:27:09,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:27:09 BoogieIcfgContainer [2022-01-11 05:27:09,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 05:27:09,590 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 05:27:09,590 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 05:27:09,591 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 05:27:09,593 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:27:09" (1/1) ... [2022-01-11 05:27:09,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:27:09 BasicIcfg [2022-01-11 05:27:09,669 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 05:27:09,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 05:27:09,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 05:27:09,672 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 05:27:09,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 05:27:08" (1/4) ... [2022-01-11 05:27:09,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470e9943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:27:09, skipping insertion in model container [2022-01-11 05:27:09,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:27:09" (2/4) ... [2022-01-11 05:27:09,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470e9943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:27:09, skipping insertion in model container [2022-01-11 05:27:09,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:27:09" (3/4) ... [2022-01-11 05:27:09,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470e9943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 05:27:09, skipping insertion in model container [2022-01-11 05:27:09,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:27:09" (4/4) ... [2022-01-11 05:27:09,674 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all_reverse.iTransformedIcfg [2022-01-11 05:27:09,677 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 05:27:09,677 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 05:27:09,714 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 05:27:09,721 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 [2022-01-11 05:27:09,721 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 05:27:09,733 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:27:09,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-11 05:27:09,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:27:09,737 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:27:09,737 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:27:09,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:27:09,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1453618607, now seen corresponding path program 1 times [2022-01-11 05:27:09,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:27:09,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930293280] [2022-01-11 05:27:09,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:27:09,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:27:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:27:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:27:09,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:27:09,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930293280] [2022-01-11 05:27:09,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930293280] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:27:09,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:27:09,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 05:27:09,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250039133] [2022-01-11 05:27:09,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:27:09,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-11 05:27:09,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:27:09,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-11 05:27:09,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 05:27:09,962 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:27:09,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:27:09,976 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2022-01-11 05:27:09,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-11 05:27:09,977 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-11 05:27:09,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:27:09,982 INFO L225 Difference]: With dead ends: 49 [2022-01-11 05:27:09,982 INFO L226 Difference]: Without dead ends: 25 [2022-01-11 05:27:09,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 05:27:09,987 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 05:27:09,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 05:27:09,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-11 05:27:10,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-11 05:27:10,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:27:10,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-01-11 05:27:10,011 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 12 [2022-01-11 05:27:10,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:27:10,012 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-01-11 05:27:10,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:27:10,013 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-01-11 05:27:10,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-11 05:27:10,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:27:10,013 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:27:10,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 05:27:10,014 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:27:10,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:27:10,015 INFO L85 PathProgramCache]: Analyzing trace with hash -566085135, now seen corresponding path program 1 times [2022-01-11 05:27:10,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:27:10,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418761938] [2022-01-11 05:27:10,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:27:10,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:27:10,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:27:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:27:10,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:27:10,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418761938] [2022-01-11 05:27:10,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418761938] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:27:10,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:27:10,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 05:27:10,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415472417] [2022-01-11 05:27:10,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:27:10,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 05:27:10,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:27:10,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 05:27:10,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 05:27:10,164 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:27:10,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:27:10,188 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-01-11 05:27:10,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 05:27:10,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-11 05:27:10,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:27:10,190 INFO L225 Difference]: With dead ends: 45 [2022-01-11 05:27:10,190 INFO L226 Difference]: Without dead ends: 29 [2022-01-11 05:27:10,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 05:27:10,193 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 05:27:10,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 47 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 05:27:10,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-11 05:27:10,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2022-01-11 05:27:10,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:27:10,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-01-11 05:27:10,203 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 12 [2022-01-11 05:27:10,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:27:10,204 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-01-11 05:27:10,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:27:10,204 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-01-11 05:27:10,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-11 05:27:10,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:27:10,205 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:27:10,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 05:27:10,205 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:27:10,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:27:10,205 INFO L85 PathProgramCache]: Analyzing trace with hash 32407498, now seen corresponding path program 1 times [2022-01-11 05:27:10,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:27:10,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068519997] [2022-01-11 05:27:10,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:27:10,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:27:10,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:27:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 05:27:10,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:27:10,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068519997] [2022-01-11 05:27:10,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068519997] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:27:10,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:27:10,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-11 05:27:10,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641151244] [2022-01-11 05:27:10,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:27:10,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 05:27:10,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:27:10,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 05:27:10,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-11 05:27:10,330 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:27:10,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:27:10,363 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-01-11 05:27:10,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 05:27:10,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-11 05:27:10,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:27:10,365 INFO L225 Difference]: With dead ends: 40 [2022-01-11 05:27:10,365 INFO L226 Difference]: Without dead ends: 36 [2022-01-11 05:27:10,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-11 05:27:10,369 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 51 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 [2022-01-11 05:27:10,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 51 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 05:27:10,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-11 05:27:10,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2022-01-11 05:27:10,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:27:10,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-11 05:27:10,380 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 16 [2022-01-11 05:27:10,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:27:10,380 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-11 05:27:10,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:27:10,380 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-11 05:27:10,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-11 05:27:10,381 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:27:10,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:27:10,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-11 05:27:10,382 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:27:10,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:27:10,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1142861609, now seen corresponding path program 1 times [2022-01-11 05:27:10,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:27:10,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683237377] [2022-01-11 05:27:10,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:27:10,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:27:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:27:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 05:27:10,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:27:10,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683237377] [2022-01-11 05:27:10,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683237377] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:27:10,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:27:10,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-11 05:27:10,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738577300] [2022-01-11 05:27:10,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:27:10,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-11 05:27:10,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:27:10,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-11 05:27:10,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-11 05:27:10,640 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:27:10,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:27:10,804 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-01-11 05:27:10,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-11 05:27:10,805 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-11 05:27:10,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:27:10,805 INFO L225 Difference]: With dead ends: 41 [2022-01-11 05:27:10,805 INFO L226 Difference]: Without dead ends: 27 [2022-01-11 05:27:10,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-11 05:27:10,806 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:27:10,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 67 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 05:27:10,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-11 05:27:10,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-11 05:27:10,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:27:10,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-01-11 05:27:10,810 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2022-01-11 05:27:10,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:27:10,812 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-01-11 05:27:10,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:27:10,812 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-01-11 05:27:10,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-11 05:27:10,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:27:10,813 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] [2022-01-11 05:27:10,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-11 05:27:10,813 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:27:10,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:27:10,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1965093645, now seen corresponding path program 1 times [2022-01-11 05:27:10,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:27:10,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078558394] [2022-01-11 05:27:10,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:27:10,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:27:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:27:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 05:27:10,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:27:10,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078558394] [2022-01-11 05:27:10,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078558394] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:27:10,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:27:10,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-11 05:27:10,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31817972] [2022-01-11 05:27:10,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:27:10,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 05:27:10,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:27:10,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 05:27:10,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-11 05:27:10,947 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:27:11,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:27:11,015 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2022-01-11 05:27:11,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 05:27:11,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-11 05:27:11,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:27:11,017 INFO L225 Difference]: With dead ends: 45 [2022-01-11 05:27:11,017 INFO L226 Difference]: Without dead ends: 29 [2022-01-11 05:27:11,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-11 05:27:11,018 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 05:27:11,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 51 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 05:27:11,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-11 05:27:11,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-11 05:27:11,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:27:11,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-01-11 05:27:11,037 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 26 [2022-01-11 05:27:11,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:27:11,038 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-01-11 05:27:11,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:27:11,038 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-01-11 05:27:11,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-11 05:27:11,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:27:11,039 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:27:11,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-11 05:27:11,039 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:27:11,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:27:11,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1431769806, now seen corresponding path program 1 times [2022-01-11 05:27:11,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:27:11,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445214293] [2022-01-11 05:27:11,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:27:11,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:27:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:27:11,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 05:27:11,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:27:11,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445214293] [2022-01-11 05:27:11,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445214293] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:27:11,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934594166] [2022-01-11 05:27:11,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:27:11,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:27:11,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:27:11,184 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:27:11,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 05:27:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:27:11,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-11 05:27:11,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:27:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-11 05:27:11,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:27:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-11 05:27:11,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934594166] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:27:11,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:27:11,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-01-11 05:27:11,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495646061] [2022-01-11 05:27:11,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:27:11,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-11 05:27:11,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:27:11,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-11 05:27:11,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-11 05:27:11,758 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:27:11,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:27:11,824 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2022-01-11 05:27:11,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 05:27:11,825 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-11 05:27:11,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:27:11,826 INFO L225 Difference]: With dead ends: 59 [2022-01-11 05:27:11,826 INFO L226 Difference]: Without dead ends: 55 [2022-01-11 05:27:11,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-01-11 05:27:11,829 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 131 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 05:27:11,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 176 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 05:27:11,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-11 05:27:11,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2022-01-11 05:27:11,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:27:11,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-01-11 05:27:11,835 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 28 [2022-01-11 05:27:11,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:27:11,836 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-01-11 05:27:11,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:27:11,836 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-01-11 05:27:11,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-11 05:27:11,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:27:11,837 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2022-01-11 05:27:11,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-11 05:27:12,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-11 05:27:12,052 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:27:12,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:27:12,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1014546478, now seen corresponding path program 2 times [2022-01-11 05:27:12,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:27:12,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223885309] [2022-01-11 05:27:12,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:27:12,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:27:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:27:13,001 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:27:13,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:27:13,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223885309] [2022-01-11 05:27:13,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223885309] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:27:13,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342123138] [2022-01-11 05:27:13,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 05:27:13,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:27:13,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:27:13,004 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:27:13,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 05:27:13,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 05:27:13,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:27:13,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 79 conjunts are in the unsatisfiable core [2022-01-11 05:27:13,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:27:13,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:27:13,541 INFO L353 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-01-11 05:27:13,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 46 [2022-01-11 05:27:13,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:27:13,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 43 [2022-01-11 05:27:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-11 05:27:13,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:27:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 05:27:14,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342123138] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:27:14,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:27:14,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 7] total 28 [2022-01-11 05:27:14,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630644345] [2022-01-11 05:27:14,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:27:14,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-11 05:27:14,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:27:14,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-11 05:27:14,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-01-11 05:27:14,049 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 28 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:27:15,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:27:15,015 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2022-01-11 05:27:15,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-11 05:27:15,016 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 28 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-11 05:27:15,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:27:15,016 INFO L225 Difference]: With dead ends: 75 [2022-01-11 05:27:15,016 INFO L226 Difference]: Without dead ends: 53 [2022-01-11 05:27:15,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=269, Invalid=1291, Unknown=0, NotChecked=0, Total=1560 [2022-01-11 05:27:15,017 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 203 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 05:27:15,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 131 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-11 05:27:15,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-11 05:27:15,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2022-01-11 05:27:15,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:27:15,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-01-11 05:27:15,025 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 40 [2022-01-11 05:27:15,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:27:15,026 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-01-11 05:27:15,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 28 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:27:15,026 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-01-11 05:27:15,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-11 05:27:15,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:27:15,027 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 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] [2022-01-11 05:27:15,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 05:27:15,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-01-11 05:27:15,237 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:27:15,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:27:15,238 INFO L85 PathProgramCache]: Analyzing trace with hash -623459762, now seen corresponding path program 1 times [2022-01-11 05:27:15,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:27:15,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999143457] [2022-01-11 05:27:15,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:27:15,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:27:15,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:27:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-11 05:27:15,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:27:15,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999143457] [2022-01-11 05:27:15,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999143457] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:27:15,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919323405] [2022-01-11 05:27:15,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:27:15,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:27:15,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:27:15,444 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:27:15,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 05:27:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:27:15,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-11 05:27:15,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:27:15,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-11 05:27:15,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 62 [2022-01-11 05:27:15,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-11 05:27:15,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 37 [2022-01-11 05:27:15,867 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-11 05:27:15,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:27:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-11 05:27:16,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919323405] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:27:16,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:27:16,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2022-01-11 05:27:16,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461888552] [2022-01-11 05:27:16,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:27:16,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-11 05:27:16,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:27:16,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-11 05:27:16,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-11 05:27:16,034 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:27:16,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:27:16,141 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2022-01-11 05:27:16,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 05:27:16,141 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-11 05:27:16,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:27:16,142 INFO L225 Difference]: With dead ends: 89 [2022-01-11 05:27:16,142 INFO L226 Difference]: Without dead ends: 57 [2022-01-11 05:27:16,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-11 05:27:16,143 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:27:16,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 81 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 1 Unchecked, 0.1s Time] [2022-01-11 05:27:16,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-11 05:27:16,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-01-11 05:27:16,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:27:16,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2022-01-11 05:27:16,153 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 42 [2022-01-11 05:27:16,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:27:16,154 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2022-01-11 05:27:16,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:27:16,154 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2022-01-11 05:27:16,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-11 05:27:16,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:27:16,154 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:27:16,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-11 05:27:16,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:27:16,371 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:27:16,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:27:16,372 INFO L85 PathProgramCache]: Analyzing trace with hash 133542441, now seen corresponding path program 2 times [2022-01-11 05:27:16,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:27:16,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398572513] [2022-01-11 05:27:16,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:27:16,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:27:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:27:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-11 05:27:17,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:27:17,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398572513] [2022-01-11 05:27:17,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398572513] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:27:17,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119963964] [2022-01-11 05:27:17,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 05:27:17,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:27:17,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:27:17,949 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:27:17,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 05:27:18,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 05:27:18,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:27:18,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 101 conjunts are in the unsatisfiable core [2022-01-11 05:27:18,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:27:18,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-11 05:27:18,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-11 05:27:18,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:27:18,456 INFO L353 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-01-11 05:27:18,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 37 [2022-01-11 05:27:18,465 INFO L353 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-01-11 05:27:18,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 39 [2022-01-11 05:27:19,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:27:19,657 INFO L353 Elim1Store]: treesize reduction 94, result has 24.8 percent of original size [2022-01-11 05:27:19,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 232 treesize of output 127 [2022-01-11 05:27:19,669 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-11 05:27:19,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 41 [2022-01-11 05:27:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-11 05:27:19,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:27:21,654 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_ULTIMATE.start_main_~#s~0#1.baseInt| Int)) (let ((.cse5 (store |c_#memory_$Pointer$.offsetInt| |c_ULTIMATE.start_ULTIMATE.start_sll_circular_create_~last~0#1.baseInt| (store (select |c_#memory_$Pointer$.offsetInt| |c_ULTIMATE.start_ULTIMATE.start_sll_circular_create_~last~0#1.baseInt|) |c_ULTIMATE.start_ULTIMATE.start_sll_circular_create_~last~0#1.offsetInt| |c_ULTIMATE.start_ULTIMATE.start_sll_circular_create_~head~0#1.offsetInt|))) (.cse2 (store |c_#memory_$Pointer$.baseInt| |c_ULTIMATE.start_ULTIMATE.start_sll_circular_create_~last~0#1.baseInt| (store (select |c_#memory_$Pointer$.baseInt| |c_ULTIMATE.start_ULTIMATE.start_sll_circular_create_~last~0#1.baseInt|) |c_ULTIMATE.start_ULTIMATE.start_sll_circular_create_~last~0#1.offsetInt| |c_ULTIMATE.start_ULTIMATE.start_sll_circular_create_~head~0#1.baseInt|)))) (let ((.cse0 (select (select .cse2 |ULTIMATE.start_ULTIMATE.start_main_~#s~0#1.baseInt|) |c_ULTIMATE.start_ULTIMATE.start_main_~#s~0#1.offsetInt|)) (.cse1 (select (select .cse5 |ULTIMATE.start_ULTIMATE.start_main_~#s~0#1.baseInt|) |c_ULTIMATE.start_ULTIMATE.start_main_~#s~0#1.offsetInt|))) (let ((.cse3 (select (select .cse2 .cse0) .cse1)) (.cse4 (select (select .cse5 .cse0) .cse1))) (or (not (= .cse0 |c_ULTIMATE.start_ULTIMATE.start_sll_circular_create_~head~0#1.baseInt|)) (not (= |c_ULTIMATE.start_ULTIMATE.start_sll_circular_create_~head~0#1.offsetInt| .cse1)) (not (= .cse0 (select (select .cse2 (select (select .cse2 .cse3) .cse4)) (select (select .cse5 .cse3) .cse4)))) (and (= .cse3 .cse0) (= .cse4 .cse1))))))) is different from false [2022-01-11 05:27:21,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:27:44,916 WARN L228 SmtUtils]: Spent 23.11s on a formula simplification. DAG size of input: 2031 DAG size of output: 957 (called from [L 350] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-01-11 05:27:44,919 INFO L353 Elim1Store]: treesize reduction 31738, result has 35.6 percent of original size [2022-01-11 05:27:44,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 35 select indices, 35 select index equivalence classes, 0 disjoint index pairs (out of 595 index pairs), introduced 51 new quantified variables, introduced 595 case distinctions, treesize of input 370638 treesize of output 287330