/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_BITWISE.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-reverse.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 11:54:20,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 11:54:20,720 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 11:54:20,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 11:54:20,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 11:54:20,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 11:54:20,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 11:54:20,775 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 11:54:20,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 11:54:20,777 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 11:54:20,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 11:54:20,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 11:54:20,779 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 11:54:20,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 11:54:20,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 11:54:20,781 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 11:54:20,781 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 11:54:20,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 11:54:20,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 11:54:20,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 11:54:20,785 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 11:54:20,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 11:54:20,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 11:54:20,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 11:54:20,790 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 11:54:20,791 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 11:54:20,791 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 11:54:20,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 11:54:20,792 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 11:54:20,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 11:54:20,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 11:54:20,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 11:54:20,793 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 11:54:20,794 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 11:54:20,795 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 11:54:20,795 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 11:54:20,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 11:54:20,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 11:54:20,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 11:54:20,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 11:54:20,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 11:54:20,805 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 11:54:20,821 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 11:54:20,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 11:54:20,821 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 11:54:20,821 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 11:54:20,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 11:54:20,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 11:54:20,822 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 11:54:20,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 11:54:20,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 11:54:20,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 11:54:20,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 11:54:20,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 11:54:20,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 11:54:20,823 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 11:54:20,823 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 11:54:20,823 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 11:54:20,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 11:54:20,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 11:54:20,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 11:54:20,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 11:54:20,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 11:54:20,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 11:54:20,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 11:54:20,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 11:54:20,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 11:54:20,824 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 11:54:20,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 11:54:20,825 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 11:54:20,825 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 11:54:20,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 11:54:20,825 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 11:54:20,825 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 11:54:20,826 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 11:54:20,826 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 11:54:20,969 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 11:54:20,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 11:54:20,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 11:54:20,991 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 11:54:20,991 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 11:54:20,992 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-reverse.i [2022-01-10 11:54:21,045 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a17948154/f2bc74a5863740889dff5e133aa9cd61/FLAG839cd3f7c [2022-01-10 11:54:21,428 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 11:54:21,429 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-reverse.i [2022-01-10 11:54:21,436 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a17948154/f2bc74a5863740889dff5e133aa9cd61/FLAG839cd3f7c [2022-01-10 11:54:21,444 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a17948154/f2bc74a5863740889dff5e133aa9cd61 [2022-01-10 11:54:21,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 11:54:21,448 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 11:54:21,450 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 11:54:21,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 11:54:21,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 11:54:21,452 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 11:54:21" (1/1) ... [2022-01-10 11:54:21,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@682e9271 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:54:21, skipping insertion in model container [2022-01-10 11:54:21,453 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 11:54:21" (1/1) ... [2022-01-10 11:54:21,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 11:54:21,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 11:54:21,679 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-reverse.i[22309,22322] [2022-01-10 11:54:21,680 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-reverse.i[22394,22407] [2022-01-10 11:54:21,684 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-reverse.i[22924,22937] [2022-01-10 11:54:21,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 11:54:21,699 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 11:54:21,740 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-reverse.i[22309,22322] [2022-01-10 11:54:21,741 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-reverse.i[22394,22407] [2022-01-10 11:54:21,744 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-reverse.i[22924,22937] [2022-01-10 11:54:21,746 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 11:54:21,770 INFO L208 MainTranslator]: Completed translation [2022-01-10 11:54:21,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:54:21 WrapperNode [2022-01-10 11:54:21,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 11:54:21,771 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 11:54:21,771 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 11:54:21,771 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 11:54:21,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:54:21" (1/1) ... [2022-01-10 11:54:21,800 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:54:21" (1/1) ... [2022-01-10 11:54:21,818 INFO L137 Inliner]: procedures = 122, calls = 41, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 138 [2022-01-10 11:54:21,819 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 11:54:21,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 11:54:21,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 11:54:21,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 11:54:21,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:54:21" (1/1) ... [2022-01-10 11:54:21,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:54:21" (1/1) ... [2022-01-10 11:54:21,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:54:21" (1/1) ... [2022-01-10 11:54:21,836 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:54:21" (1/1) ... [2022-01-10 11:54:21,842 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:54:21" (1/1) ... [2022-01-10 11:54:21,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:54:21" (1/1) ... [2022-01-10 11:54:21,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:54:21" (1/1) ... [2022-01-10 11:54:21,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 11:54:21,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 11:54:21,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 11:54:21,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 11:54:21,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:54:21" (1/1) ... [2022-01-10 11:54:21,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 11:54:21,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 11:54:21,885 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 11:54:21,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 11:54:21,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 11:54:21,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 11:54:21,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 11:54:21,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-10 11:54:21,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-10 11:54:21,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 11:54:21,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 11:54:21,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 11:54:21,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 11:54:21,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 11:54:22,037 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 11:54:22,038 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 11:54:22,505 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 11:54:22,509 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 11:54:22,509 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-01-10 11:54:22,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:54:22 BoogieIcfgContainer [2022-01-10 11:54:22,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 11:54:22,511 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 11:54:22,511 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 11:54:22,512 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 11:54:22,514 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:54:22" (1/1) ... [2022-01-10 11:54:22,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 11:54:22 BasicIcfg [2022-01-10 11:54:22,579 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 11:54:22,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 11:54:22,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 11:54:22,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 11:54:22,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 11:54:21" (1/4) ... [2022-01-10 11:54:22,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257066b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 11:54:22, skipping insertion in model container [2022-01-10 11:54:22,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:54:21" (2/4) ... [2022-01-10 11:54:22,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257066b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 11:54:22, skipping insertion in model container [2022-01-10 11:54:22,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:54:22" (3/4) ... [2022-01-10 11:54:22,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257066b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 11:54:22, skipping insertion in model container [2022-01-10 11:54:22,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 11:54:22" (4/4) ... [2022-01-10 11:54:22,584 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-reverse.iTransformedIcfg [2022-01-10 11:54:22,587 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 11:54:22,587 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-01-10 11:54:22,613 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 11:54:22,617 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 11:54:22,617 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-10 11:54:22,627 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 34 states have internal predecessors, (56), 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) [2022-01-10 11:54:22,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-01-10 11:54:22,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 11:54:22,630 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-01-10 11:54:22,631 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 11:54:22,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 11:54:22,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1770789928, now seen corresponding path program 1 times [2022-01-10 11:54:22,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 11:54:22,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112599039] [2022-01-10 11:54:22,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 11:54:22,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 11:54:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 11:54:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 11:54:22,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 11:54:22,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112599039] [2022-01-10 11:54:22,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112599039] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 11:54:22,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 11:54:22,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 11:54:22,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16836608] [2022-01-10 11:54:22,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 11:54:22,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 11:54:22,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 11:54:22,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 11:54:22,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 11:54:22,829 INFO L87 Difference]: Start difference. First operand has 35 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 34 states have internal predecessors, (56), 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 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-01-10 11:54:22,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 11:54:22,845 INFO L93 Difference]: Finished difference Result 67 states and 107 transitions. [2022-01-10 11:54:22,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 11:54:22,847 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2022-01-10 11:54:22,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 11:54:22,857 INFO L225 Difference]: With dead ends: 67 [2022-01-10 11:54:22,857 INFO L226 Difference]: Without dead ends: 29 [2022-01-10 11:54:22,859 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 [2022-01-10 11:54:22,861 INFO L933 BasicCegarLoop]: 42 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, 42 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 [2022-01-10 11:54:22,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 11:54:22,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-10 11:54:22,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-10 11:54:22,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 28 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) [2022-01-10 11:54:22,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-01-10 11:54:22,890 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 7 [2022-01-10 11:54:22,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 11:54:22,891 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-01-10 11:54:22,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-01-10 11:54:22,891 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-01-10 11:54:22,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-10 11:54:22,892 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 11:54:22,893 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 11:54:22,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 11:54:22,893 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 11:54:22,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 11:54:22,895 INFO L85 PathProgramCache]: Analyzing trace with hash 968747949, now seen corresponding path program 1 times [2022-01-10 11:54:22,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 11:54:22,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332734692] [2022-01-10 11:54:22,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 11:54:22,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 11:54:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 11:54:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 11:54:22,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 11:54:22,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332734692] [2022-01-10 11:54:22,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332734692] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 11:54:22,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 11:54:22,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 11:54:22,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285276195] [2022-01-10 11:54:22,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 11:54:22,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 11:54:22,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 11:54:22,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 11:54:22,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 11:54:22,994 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-01-10 11:54:23,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 11:54:23,122 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2022-01-10 11:54:23,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 11:54:23,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2022-01-10 11:54:23,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 11:54:23,123 INFO L225 Difference]: With dead ends: 54 [2022-01-10 11:54:23,123 INFO L226 Difference]: Without dead ends: 40 [2022-01-10 11:54:23,124 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 [2022-01-10 11:54:23,124 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 35 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 11:54:23,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 49 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 11:54:23,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-10 11:54:23,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2022-01-10 11:54:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 11:54:23,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-01-10 11:54:23,129 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 8 [2022-01-10 11:54:23,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 11:54:23,129 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-01-10 11:54:23,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-01-10 11:54:23,129 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-01-10 11:54:23,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-10 11:54:23,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 11:54:23,130 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 11:54:23,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 11:54:23,130 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 11:54:23,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 11:54:23,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1246276163, now seen corresponding path program 1 times [2022-01-10 11:54:23,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 11:54:23,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456261135] [2022-01-10 11:54:23,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 11:54:23,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 11:54:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 11:54:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 11:54:23,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 11:54:23,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456261135] [2022-01-10 11:54:23,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456261135] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 11:54:23,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358852045] [2022-01-10 11:54:23,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 11:54:23,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 11:54:23,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 11:54:23,277 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) [2022-01-10 11:54:23,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 11:54:23,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 11:54:23,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 11:54:23,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 11:54:23,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-10 11:54:23,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-10 11:54:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 11:54:23,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 11:54:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 11:54:23,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358852045] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 11:54:23,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 11:54:23,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-01-10 11:54:23,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072190335] [2022-01-10 11:54:23,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 11:54:23,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 11:54:23,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 11:54:23,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 11:54:23,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-10 11:54:23,606 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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) [2022-01-10 11:54:23,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 11:54:23,869 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-01-10 11:54:23,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 11:54:23,870 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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 13 [2022-01-10 11:54:23,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 11:54:23,871 INFO L225 Difference]: With dead ends: 35 [2022-01-10 11:54:23,871 INFO L226 Difference]: Without dead ends: 31 [2022-01-10 11:54:23,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-01-10 11:54:23,872 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 15 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 11:54:23,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 60 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 11:54:23,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-10 11:54:23,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2022-01-10 11:54:23,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 11:54:23,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-01-10 11:54:23,876 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 13 [2022-01-10 11:54:23,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 11:54:23,876 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-01-10 11:54:23,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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) [2022-01-10 11:54:23,876 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-01-10 11:54:23,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 11:54:23,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 11:54:23,877 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 11:54:23,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 11:54:24,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 11:54:24,084 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 11:54:24,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 11:54:24,084 INFO L85 PathProgramCache]: Analyzing trace with hash -2003863423, now seen corresponding path program 1 times [2022-01-10 11:54:24,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 11:54:24,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096519830] [2022-01-10 11:54:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 11:54:24,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 11:54:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 11:54:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 11:54:24,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 11:54:24,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096519830] [2022-01-10 11:54:24,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096519830] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 11:54:24,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502842213] [2022-01-10 11:54:24,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 11:54:24,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 11:54:24,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 11:54:24,327 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) [2022-01-10 11:54:24,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 11:54:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 11:54:24,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-10 11:54:24,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 11:54:24,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-10 11:54:24,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-01-10 11:54:24,646 INFO L353 Elim1Store]: treesize reduction 56, result has 33.3 percent of original size [2022-01-10 11:54:24,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 85 [2022-01-10 11:54:24,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2022-01-10 11:54:24,680 INFO L353 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-01-10 11:54:24,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 18 [2022-01-10 11:54:24,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-10 11:54:24,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 11:54:24,848 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 11:54:24,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2022-01-10 11:54:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 11:54:24,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 11:54:24,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 11:54:24,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 50 [2022-01-10 11:54:24,958 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 11:54:24,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 651 treesize of output 426 [2022-01-10 11:54:24,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 400 treesize of output 376 [2022-01-10 11:54:24,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 285 treesize of output 277 [2022-01-10 11:54:24,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 368 treesize of output 352 [2022-01-10 11:54:25,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 11:54:25,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502842213] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 11:54:25,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 11:54:25,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-10 11:54:25,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109827251] [2022-01-10 11:54:25,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 11:54:25,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 11:54:25,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 11:54:25,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 11:54:25,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-10 11:54:25,928 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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) [2022-01-10 11:54:26,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 11:54:26,067 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2022-01-10 11:54:26,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 11:54:26,068 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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 18 [2022-01-10 11:54:26,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 11:54:26,069 INFO L225 Difference]: With dead ends: 53 [2022-01-10 11:54:26,069 INFO L226 Difference]: Without dead ends: 43 [2022-01-10 11:54:26,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-01-10 11:54:26,070 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 11:54:26,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 80 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-01-10 11:54:26,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-10 11:54:26,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2022-01-10 11:54:26,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2857142857142858) 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) [2022-01-10 11:54:26,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-01-10 11:54:26,074 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-01-10 11:54:26,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 11:54:26,075 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-01-10 11:54:26,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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) [2022-01-10 11:54:26,075 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-01-10 11:54:26,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 11:54:26,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 11:54:26,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 11:54:26,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 11:54:26,276 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,SelfDestructingSolverStorable3 [2022-01-10 11:54:26,276 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 11:54:26,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 11:54:26,277 INFO L85 PathProgramCache]: Analyzing trace with hash 483649410, now seen corresponding path program 1 times [2022-01-10 11:54:26,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 11:54:26,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129628751] [2022-01-10 11:54:26,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 11:54:26,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 11:54:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 11:54:26,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 11:54:26,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 11:54:26,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129628751] [2022-01-10 11:54:26,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129628751] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 11:54:26,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 11:54:26,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 11:54:26,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675999342] [2022-01-10 11:54:26,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 11:54:26,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 11:54:26,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 11:54:26,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 11:54:26,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 11:54:26,439 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-01-10 11:54:26,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 11:54:26,581 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2022-01-10 11:54:26,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 11:54:26,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 18 [2022-01-10 11:54:26,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 11:54:26,582 INFO L225 Difference]: With dead ends: 60 [2022-01-10 11:54:26,582 INFO L226 Difference]: Without dead ends: 47 [2022-01-10 11:54:26,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 11:54:26,583 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 16 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 11:54:26,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 68 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 11:54:26,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-10 11:54:26,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2022-01-10 11:54:26,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 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) [2022-01-10 11:54:26,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-01-10 11:54:26,587 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 18 [2022-01-10 11:54:26,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 11:54:26,587 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-01-10 11:54:26,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-01-10 11:54:26,587 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-01-10 11:54:26,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 11:54:26,587 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 11:54:26,587 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 11:54:26,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 11:54:26,588 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 11:54:26,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 11:54:26,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1162814432, now seen corresponding path program 2 times [2022-01-10 11:54:26,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 11:54:26,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447672255] [2022-01-10 11:54:26,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 11:54:26,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 11:54:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat