/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/array-examples/sorting_selectionsort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 02:52:18,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 02:52:18,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 02:52:19,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 02:52:19,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 02:52:19,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 02:52:19,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 02:52:19,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 02:52:19,042 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 02:52:19,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 02:52:19,046 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 02:52:19,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 02:52:19,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 02:52:19,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 02:52:19,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 02:52:19,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 02:52:19,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 02:52:19,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 02:52:19,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 02:52:19,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 02:52:19,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 02:52:19,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 02:52:19,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 02:52:19,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 02:52:19,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 02:52:19,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 02:52:19,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 02:52:19,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 02:52:19,071 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 02:52:19,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 02:52:19,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 02:52:19,072 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 02:52:19,072 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 02:52:19,073 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 02:52:19,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 02:52:19,074 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 02:52:19,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 02:52:19,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 02:52:19,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 02:52:19,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 02:52:19,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 02:52:19,080 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 02:52:19,103 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 02:52:19,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 02:52:19,103 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 02:52:19,103 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 02:52:19,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 02:52:19,104 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 02:52:19,104 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 02:52:19,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 02:52:19,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 02:52:19,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 02:52:19,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 02:52:19,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 02:52:19,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 02:52:19,105 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 02:52:19,105 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 02:52:19,105 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 02:52:19,105 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 02:52:19,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 02:52:19,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 02:52:19,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 02:52:19,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 02:52:19,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 02:52:19,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 02:52:19,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 02:52:19,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 02:52:19,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 02:52:19,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 02:52:19,106 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 02:52:19,106 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 02:52:19,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 02:52:19,106 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 02:52:19,106 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 02:52:19,107 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 02:52:19,109 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 02:52:19,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 02:52:19,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 02:52:19,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 02:52:19,351 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 02:52:19,352 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 02:52:19,353 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2022-01-11 02:52:19,405 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78f25e094/9293e7fd880b4863adb02ccb36c77500/FLAG9117e0282 [2022-01-11 02:52:19,780 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 02:52:19,781 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2022-01-11 02:52:19,790 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78f25e094/9293e7fd880b4863adb02ccb36c77500/FLAG9117e0282 [2022-01-11 02:52:19,810 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78f25e094/9293e7fd880b4863adb02ccb36c77500 [2022-01-11 02:52:19,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 02:52:19,812 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 02:52:19,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 02:52:19,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 02:52:19,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 02:52:19,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:52:19" (1/1) ... [2022-01-11 02:52:19,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@295bca78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:52:19, skipping insertion in model container [2022-01-11 02:52:19,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:52:19" (1/1) ... [2022-01-11 02:52:19,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 02:52:19,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 02:52:19,952 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i[823,836] [2022-01-11 02:52:19,969 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 02:52:19,975 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 02:52:19,986 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i[823,836] [2022-01-11 02:52:20,002 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 02:52:20,014 INFO L208 MainTranslator]: Completed translation [2022-01-11 02:52:20,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:52:20 WrapperNode [2022-01-11 02:52:20,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 02:52:20,015 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 02:52:20,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 02:52:20,015 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 02:52:20,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:52:20" (1/1) ... [2022-01-11 02:52:20,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:52:20" (1/1) ... [2022-01-11 02:52:20,042 INFO L137 Inliner]: procedures = 18, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 128 [2022-01-11 02:52:20,042 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 02:52:20,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 02:52:20,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 02:52:20,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 02:52:20,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:52:20" (1/1) ... [2022-01-11 02:52:20,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:52:20" (1/1) ... [2022-01-11 02:52:20,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:52:20" (1/1) ... [2022-01-11 02:52:20,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:52:20" (1/1) ... [2022-01-11 02:52:20,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:52:20" (1/1) ... [2022-01-11 02:52:20,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:52:20" (1/1) ... [2022-01-11 02:52:20,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:52:20" (1/1) ... [2022-01-11 02:52:20,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 02:52:20,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 02:52:20,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 02:52:20,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 02:52:20,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:52:20" (1/1) ... [2022-01-11 02:52:20,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 02:52:20,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:52:20,099 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 02:52:20,113 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 02:52:20,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 02:52:20,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 02:52:20,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-11 02:52:20,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-11 02:52:20,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 02:52:20,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 02:52:20,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-11 02:52:20,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-11 02:52:20,168 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 02:52:20,169 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 02:52:20,320 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 02:52:20,324 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 02:52:20,324 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2022-01-11 02:52:20,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:52:20 BoogieIcfgContainer [2022-01-11 02:52:20,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 02:52:20,326 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 02:52:20,326 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 02:52:20,330 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 02:52:20,332 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:52:20" (1/1) ... [2022-01-11 02:52:20,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:52:20 BasicIcfg [2022-01-11 02:52:20,483 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 02:52:20,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 02:52:20,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 02:52:20,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 02:52:20,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 02:52:19" (1/4) ... [2022-01-11 02:52:20,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ea16b63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:52:20, skipping insertion in model container [2022-01-11 02:52:20,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:52:20" (2/4) ... [2022-01-11 02:52:20,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ea16b63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:52:20, skipping insertion in model container [2022-01-11 02:52:20,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:52:20" (3/4) ... [2022-01-11 02:52:20,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ea16b63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 02:52:20, skipping insertion in model container [2022-01-11 02:52:20,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:52:20" (4/4) ... [2022-01-11 02:52:20,488 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-1.iTransformedIcfg [2022-01-11 02:52:20,491 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 02:52:20,491 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-01-11 02:52:20,527 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 02:52:20,534 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 02:52:20,534 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-11 02:52:20,543 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 39 states have internal predecessors, (60), 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 02:52:20,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-11 02:52:20,546 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:52:20,547 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:52:20,547 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:52:20,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:52:20,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1176236106, now seen corresponding path program 1 times [2022-01-11 02:52:20,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:52:20,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649121046] [2022-01-11 02:52:20,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:52:20,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:52:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:52:20,693 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 02:52:20,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:52:20,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649121046] [2022-01-11 02:52:20,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649121046] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:52:20,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:52:20,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 02:52:20,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889284892] [2022-01-11 02:52:20,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:52:20,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-11 02:52:20,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:52:20,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-11 02:52:20,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 02:52:20,724 INFO L87 Difference]: Start difference. First operand has 40 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 39 states have internal predecessors, (60), 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 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 02:52:20,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:52:20,736 INFO L93 Difference]: Finished difference Result 76 states and 114 transitions. [2022-01-11 02:52:20,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-11 02:52:20,739 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2022-01-11 02:52:20,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:52:20,745 INFO L225 Difference]: With dead ends: 76 [2022-01-11 02:52:20,745 INFO L226 Difference]: Without dead ends: 36 [2022-01-11 02:52:20,747 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 02:52:20,750 INFO L933 BasicCegarLoop]: 49 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, 49 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 02:52:20,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:52:20,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-11 02:52:20,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-11 02:52:20,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 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 02:52:20,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-01-11 02:52:20,777 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 10 [2022-01-11 02:52:20,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:52:20,777 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-01-11 02:52:20,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 02:52:20,777 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-01-11 02:52:20,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-11 02:52:20,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:52:20,778 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:52:20,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 02:52:20,778 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:52:20,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:52:20,779 INFO L85 PathProgramCache]: Analyzing trace with hash 595203380, now seen corresponding path program 1 times [2022-01-11 02:52:20,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:52:20,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991999448] [2022-01-11 02:52:20,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:52:20,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:52:20,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:52:20,861 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 02:52:20,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:52:20,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991999448] [2022-01-11 02:52:20,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991999448] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:52:20,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:52:20,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 02:52:20,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713816332] [2022-01-11 02:52:20,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:52:20,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 02:52:20,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:52:20,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 02:52:20,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:52:20,864 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 02:52:20,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:52:20,881 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2022-01-11 02:52:20,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 02:52:20,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2022-01-11 02:52:20,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:52:20,883 INFO L225 Difference]: With dead ends: 70 [2022-01-11 02:52:20,883 INFO L226 Difference]: Without dead ends: 38 [2022-01-11 02:52:20,883 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 02:52:20,884 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 1 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:52:20,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 84 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:52:20,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-11 02:52:20,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-01-11 02:52:20,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 36 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 02:52:20,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-01-11 02:52:20,895 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 10 [2022-01-11 02:52:20,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:52:20,895 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-01-11 02:52:20,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 02:52:20,896 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-01-11 02:52:20,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-11 02:52:20,896 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:52:20,896 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:52:20,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 02:52:20,897 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:52:20,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:52:20,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1753192810, now seen corresponding path program 1 times [2022-01-11 02:52:20,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:52:20,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595631299] [2022-01-11 02:52:20,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:52:20,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:52:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:52:20,988 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 02:52:20,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:52:20,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595631299] [2022-01-11 02:52:20,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595631299] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:52:20,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:52:20,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 02:52:20,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289777646] [2022-01-11 02:52:20,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:52:20,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 02:52:20,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:52:20,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 02:52:20,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:52:20,990 INFO L87 Difference]: Start difference. First operand 37 states and 46 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 02:52:21,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:52:21,055 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2022-01-11 02:52:21,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 02:52:21,055 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 02:52:21,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:52:21,056 INFO L225 Difference]: With dead ends: 68 [2022-01-11 02:52:21,056 INFO L226 Difference]: Without dead ends: 59 [2022-01-11 02:52:21,057 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 02:52:21,058 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 30 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 02:52:21,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 66 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 02:52:21,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-11 02:52:21,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2022-01-11 02:52:21,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 37 states have internal predecessors, (47), 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 02:52:21,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-01-11 02:52:21,064 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 12 [2022-01-11 02:52:21,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:52:21,065 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-01-11 02:52:21,065 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 02:52:21,065 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-01-11 02:52:21,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-11 02:52:21,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:52:21,066 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:52:21,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-11 02:52:21,066 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:52:21,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:52:21,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1938575906, now seen corresponding path program 1 times [2022-01-11 02:52:21,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:52:21,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887671775] [2022-01-11 02:52:21,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:52:21,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:52:21,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:52:21,119 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 02:52:21,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:52:21,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887671775] [2022-01-11 02:52:21,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887671775] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:52:21,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:52:21,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 02:52:21,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213121230] [2022-01-11 02:52:21,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:52:21,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 02:52:21,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:52:21,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 02:52:21,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:52:21,121 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 02:52:21,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:52:21,184 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2022-01-11 02:52:21,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 02:52:21,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2022-01-11 02:52:21,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:52:21,186 INFO L225 Difference]: With dead ends: 90 [2022-01-11 02:52:21,186 INFO L226 Difference]: Without dead ends: 59 [2022-01-11 02:52:21,186 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 02:52:21,187 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 23 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 02:52:21,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 69 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 02:52:21,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-11 02:52:21,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2022-01-11 02:52:21,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 39 states have (on average 1.358974358974359) internal successors, (53), 41 states have internal predecessors, (53), 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 02:52:21,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2022-01-11 02:52:21,192 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 14 [2022-01-11 02:52:21,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:52:21,193 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2022-01-11 02:52:21,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 02:52:21,193 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2022-01-11 02:52:21,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-11 02:52:21,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:52:21,193 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:52:21,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-11 02:52:21,194 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:52:21,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:52:21,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1909946755, now seen corresponding path program 1 times [2022-01-11 02:52:21,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:52:21,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915367915] [2022-01-11 02:52:21,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:52:21,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:52:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:52:21,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:52:21,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:52:21,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915367915] [2022-01-11 02:52:21,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915367915] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:52:21,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873615298] [2022-01-11 02:52:21,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:52:21,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:52:21,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:52:21,277 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 02:52:21,288 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 02:52:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:52:21,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-11 02:52:21,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:52:21,443 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 02:52:21,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-11 02:52:21,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873615298] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:52:21,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-11 02:52:21,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-01-11 02:52:21,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857686639] [2022-01-11 02:52:21,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:52:21,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 02:52:21,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:52:21,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 02:52:21,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-11 02:52:21,446 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 02:52:21,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:52:21,524 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2022-01-11 02:52:21,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 02:52:21,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2022-01-11 02:52:21,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:52:21,527 INFO L225 Difference]: With dead ends: 101 [2022-01-11 02:52:21,527 INFO L226 Difference]: Without dead ends: 66 [2022-01-11 02:52:21,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-11 02:52:21,528 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 22 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 02:52:21,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 92 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 02:52:21,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-11 02:52:21,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2022-01-11 02:52:21,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 53 states have internal predecessors, (70), 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 02:52:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2022-01-11 02:52:21,533 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 14 [2022-01-11 02:52:21,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:52:21,533 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2022-01-11 02:52:21,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 02:52:21,533 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2022-01-11 02:52:21,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-11 02:52:21,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:52:21,533 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:52:21,556 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 02:52:21,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:52:21,748 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:52:21,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:52:21,748 INFO L85 PathProgramCache]: Analyzing trace with hash 920178071, now seen corresponding path program 1 times [2022-01-11 02:52:21,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:52:21,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179128297] [2022-01-11 02:52:21,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:52:21,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:52:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:52:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:52:21,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:52:21,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179128297] [2022-01-11 02:52:21,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179128297] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:52:21,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44402078] [2022-01-11 02:52:21,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:52:21,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:52:21,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:52:21,824 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 02:52:21,825 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 02:52:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:52:21,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-11 02:52:21,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:52:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:52:21,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:52:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:52:22,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44402078] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:52:22,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:52:22,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-11 02:52:22,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908967329] [2022-01-11 02:52:22,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:52:22,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-11 02:52:22,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:52:22,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-11 02:52:22,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-11 02:52:22,108 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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 02:52:22,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:52:22,142 INFO L93 Difference]: Finished difference Result 109 states and 143 transitions. [2022-01-11 02:52:22,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-11 02:52:22,142 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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 15 [2022-01-11 02:52:22,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:52:22,143 INFO L225 Difference]: With dead ends: 109 [2022-01-11 02:52:22,143 INFO L226 Difference]: Without dead ends: 60 [2022-01-11 02:52:22,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-01-11 02:52:22,144 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 4 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:52:22,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 166 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:52:22,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-11 02:52:22,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-01-11 02:52:22,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 59 states have internal predecessors, (76), 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 02:52:22,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2022-01-11 02:52:22,148 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 15 [2022-01-11 02:52:22,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:52:22,148 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2022-01-11 02:52:22,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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 02:52:22,149 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2022-01-11 02:52:22,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-11 02:52:22,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:52:22,149 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:52:22,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-11 02:52:22,352 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,SelfDestructingSolverStorable5 [2022-01-11 02:52:22,353 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:52:22,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:52:22,353 INFO L85 PathProgramCache]: Analyzing trace with hash -962993487, now seen corresponding path program 2 times [2022-01-11 02:52:22,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:52:22,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682648217] [2022-01-11 02:52:22,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:52:22,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:52:22,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:52:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-11 02:52:22,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:52:22,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682648217] [2022-01-11 02:52:22,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682648217] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:52:22,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:52:22,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-11 02:52:22,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946305348] [2022-01-11 02:52:22,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:52:22,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 02:52:22,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:52:22,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 02:52:22,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-11 02:52:22,417 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 02:52:22,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:52:22,482 INFO L93 Difference]: Finished difference Result 111 states and 140 transitions. [2022-01-11 02:52:22,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 02:52:22,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2022-01-11 02:52:22,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:52:22,483 INFO L225 Difference]: With dead ends: 111 [2022-01-11 02:52:22,483 INFO L226 Difference]: Without dead ends: 71 [2022-01-11 02:52:22,483 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 02:52:22,484 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 27 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 02:52:22,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 95 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 02:52:22,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-11 02:52:22,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2022-01-11 02:52:22,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 60 states have internal predecessors, (77), 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 02:52:22,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2022-01-11 02:52:22,489 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 21 [2022-01-11 02:52:22,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:52:22,489 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2022-01-11 02:52:22,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 02:52:22,489 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2022-01-11 02:52:22,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-11 02:52:22,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:52:22,490 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:52:22,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-11 02:52:22,490 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:52:22,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:52:22,490 INFO L85 PathProgramCache]: Analyzing trace with hash -207076497, now seen corresponding path program 1 times [2022-01-11 02:52:22,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:52:22,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617173025] [2022-01-11 02:52:22,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:52:22,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:52:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:52:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-11 02:52:22,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:52:22,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617173025] [2022-01-11 02:52:22,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617173025] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:52:22,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699756569] [2022-01-11 02:52:22,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:52:22,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:52:22,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:52:22,588 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 02:52:22,589 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 02:52:22,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:52:22,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 02:52:22,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:52:29,107 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-11 02:52:29,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:52:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-11 02:52:31,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699756569] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:52:31,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:52:31,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 13 [2022-01-11 02:52:31,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513429523] [2022-01-11 02:52:31,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:52:31,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-11 02:52:31,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:52:31,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-11 02:52:31,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=120, Unknown=4, NotChecked=0, Total=156 [2022-01-11 02:52:31,224 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 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 02:52:43,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:52:43,673 INFO L93 Difference]: Finished difference Result 113 states and 147 transitions. [2022-01-11 02:52:43,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-11 02:52:43,674 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 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 24 [2022-01-11 02:52:43,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:52:43,675 INFO L225 Difference]: With dead ends: 113 [2022-01-11 02:52:43,675 INFO L226 Difference]: Without dead ends: 72 [2022-01-11 02:52:43,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=64, Invalid=232, Unknown=10, NotChecked=0, Total=306 [2022-01-11 02:52:43,676 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 16 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 02:52:43,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 362 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 90 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2022-01-11 02:52:43,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-11 02:52:43,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-01-11 02:52:43,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 69 states have (on average 1.318840579710145) internal successors, (91), 71 states have internal predecessors, (91), 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 02:52:43,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2022-01-11 02:52:43,682 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 24 [2022-01-11 02:52:43,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:52:43,682 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2022-01-11 02:52:43,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 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 02:52:43,682 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2022-01-11 02:52:43,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-11 02:52:43,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:52:43,683 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:52:43,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-11 02:52:43,883 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 02:52:43,884 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:52:43,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:52:43,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1447498703, now seen corresponding path program 2 times [2022-01-11 02:52:43,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:52:43,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296862414] [2022-01-11 02:52:43,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:52:43,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:52:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:52:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-11 02:52:44,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:52:44,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296862414] [2022-01-11 02:52:44,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296862414] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:52:44,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282705532] [2022-01-11 02:52:44,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 02:52:44,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:52:44,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:52:44,073 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 02:52:44,095 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 02:52:44,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-11 02:52:44,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:52:44,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-11 02:52:44,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:52:44,345 INFO L353 Elim1Store]: treesize reduction 61, result has 49.2 percent of original size [2022-01-11 02:52:44,345 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 1 case distinctions, treesize of input 46 treesize of output 83 [2022-01-11 02:52:44,450 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-11 02:52:44,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-11 02:52:44,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282705532] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:52:44,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-11 02:52:44,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-01-11 02:52:44,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643669293] [2022-01-11 02:52:44,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:52:44,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-11 02:52:44,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:52:44,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-11 02:52:44,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-11 02:52:44,452 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 02:52:44,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:52:44,575 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2022-01-11 02:52:44,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-11 02:52:44,575 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 30 [2022-01-11 02:52:44,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:52:44,576 INFO L225 Difference]: With dead ends: 84 [2022-01-11 02:52:44,576 INFO L226 Difference]: Without dead ends: 82 [2022-01-11 02:52:44,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-01-11 02:52:44,576 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 94 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 02:52:44,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 95 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 02:52:44,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-11 02:52:44,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2022-01-11 02:52:44,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 70 states have (on average 1.3142857142857143) internal successors, (92), 72 states have internal predecessors, (92), 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 02:52:44,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2022-01-11 02:52:44,582 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 30 [2022-01-11 02:52:44,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:52:44,582 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2022-01-11 02:52:44,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 02:52:44,582 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2022-01-11 02:52:44,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-11 02:52:44,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:52:44,583 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:52:44,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-11 02:52:44,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:52:44,787 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:52:44,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:52:44,787 INFO L85 PathProgramCache]: Analyzing trace with hash -199234617, now seen corresponding path program 1 times [2022-01-11 02:52:44,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:52:44,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387834677] [2022-01-11 02:52:44,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:52:44,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:52:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:52:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-11 02:52:44,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:52:44,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387834677] [2022-01-11 02:52:44,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387834677] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:52:44,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166113928] [2022-01-11 02:52:44,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:52:44,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:52:44,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:52:44,988 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:52:44,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-11 02:52:45,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:52:45,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-11 02:52:45,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:52:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-11 02:52:45,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:52:48,316 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-11 02:52:48,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166113928] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:52:48,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:52:48,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 11] total 20 [2022-01-11 02:52:48,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324340731] [2022-01-11 02:52:48,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:52:48,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-11 02:52:48,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:52:48,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-11 02:52:48,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=297, Unknown=1, NotChecked=0, Total=380 [2022-01-11 02:52:48,319 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 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 02:52:56,831 WARN L228 SmtUtils]: Spent 7.50s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-11 02:53:02,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:53:02,696 INFO L93 Difference]: Finished difference Result 169 states and 215 transitions. [2022-01-11 02:53:02,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-11 02:53:02,697 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 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 34 [2022-01-11 02:53:02,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:53:02,697 INFO L225 Difference]: With dead ends: 169 [2022-01-11 02:53:02,697 INFO L226 Difference]: Without dead ends: 107 [2022-01-11 02:53:02,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=130, Invalid=421, Unknown=1, NotChecked=0, Total=552 [2022-01-11 02:53:02,698 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 37 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-11 02:53:02,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 465 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-11 02:53:02,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-11 02:53:02,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2022-01-11 02:53:02,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 84 states have internal predecessors, (104), 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 02:53:02,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2022-01-11 02:53:02,708 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 34 [2022-01-11 02:53:02,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:53:02,709 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2022-01-11 02:53:02,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 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 02:53:02,709 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2022-01-11 02:53:02,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-11 02:53:02,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:53:02,709 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:53:02,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-11 02:53:02,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-11 02:53:02,911 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:53:02,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:53:02,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1862760595, now seen corresponding path program 2 times [2022-01-11 02:53:02,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:53:02,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807549721] [2022-01-11 02:53:02,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:53:02,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:53:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:53:03,067 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-01-11 02:53:03,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:53:03,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807549721] [2022-01-11 02:53:03,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807549721] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:53:03,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788292380] [2022-01-11 02:53:03,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 02:53:03,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:53:03,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:53:03,080 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:53:03,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-11 02:53:03,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 02:53:03,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:53:03,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-11 02:53:03,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:53:04,696 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-11 02:53:04,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:53:05,667 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-01-11 02:53:05,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788292380] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:53:05,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:53:05,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 8] total 24 [2022-01-11 02:53:05,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203252906] [2022-01-11 02:53:05,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:53:05,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-11 02:53:05,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:53:05,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-11 02:53:05,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-01-11 02:53:05,671 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 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 02:53:23,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:53:23,541 INFO L93 Difference]: Finished difference Result 219 states and 293 transitions. [2022-01-11 02:53:23,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-11 02:53:23,543 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 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 46 [2022-01-11 02:53:23,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:53:23,543 INFO L225 Difference]: With dead ends: 219 [2022-01-11 02:53:23,544 INFO L226 Difference]: Without dead ends: 175 [2022-01-11 02:53:23,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=289, Invalid=1192, Unknown=1, NotChecked=0, Total=1482 [2022-01-11 02:53:23,545 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 167 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-11 02:53:23,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 431 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 314 Invalid, 0 Unknown, 125 Unchecked, 1.3s Time] [2022-01-11 02:53:23,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-01-11 02:53:23,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 139. [2022-01-11 02:53:23,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 136 states have (on average 1.2941176470588236) internal successors, (176), 138 states have internal predecessors, (176), 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 02:53:23,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 176 transitions. [2022-01-11 02:53:23,584 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 176 transitions. Word has length 46 [2022-01-11 02:53:23,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:53:23,584 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 176 transitions. [2022-01-11 02:53:23,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 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 02:53:23,585 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 176 transitions. [2022-01-11 02:53:23,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-11 02:53:23,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:53:23,586 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:53:23,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-11 02:53:23,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:53:23,789 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:53:23,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:53:23,789 INFO L85 PathProgramCache]: Analyzing trace with hash -535484644, now seen corresponding path program 3 times [2022-01-11 02:53:23,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:53:23,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209177766] [2022-01-11 02:53:23,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:53:23,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:53:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:53:24,115 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-01-11 02:53:24,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:53:24,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209177766] [2022-01-11 02:53:24,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209177766] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:53:24,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114917273] [2022-01-11 02:53:24,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 02:53:24,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:53:24,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:53:24,116 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:53:24,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process