/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_NONE.epf -i ../../../trunk/examples/svcomp/ldv-regression/test22-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 23:32:26,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 23:32:26,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 23:32:26,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 23:32:26,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 23:32:26,910 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 23:32:26,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 23:32:26,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 23:32:26,918 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 23:32:26,922 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 23:32:26,923 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 23:32:26,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 23:32:26,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 23:32:26,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 23:32:26,926 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 23:32:26,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 23:32:26,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 23:32:26,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 23:32:26,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 23:32:26,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 23:32:26,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 23:32:26,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 23:32:26,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 23:32:26,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 23:32:26,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 23:32:26,942 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 23:32:26,942 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 23:32:26,943 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 23:32:26,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 23:32:26,944 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 23:32:26,944 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 23:32:26,945 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 23:32:26,946 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 23:32:26,946 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 23:32:26,947 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 23:32:26,947 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 23:32:26,948 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 23:32:26,948 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 23:32:26,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 23:32:26,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 23:32:26,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 23:32:26,949 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-10 23:32:26,974 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 23:32:26,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 23:32:26,974 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 23:32:26,974 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 23:32:26,975 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 23:32:26,975 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 23:32:26,975 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 23:32:26,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 23:32:26,976 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 23:32:26,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 23:32:26,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 23:32:26,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 23:32:26,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 23:32:26,977 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 23:32:26,977 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 23:32:26,977 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 23:32:26,977 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 23:32:26,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 23:32:26,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 23:32:26,977 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 23:32:26,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 23:32:26,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 23:32:26,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 23:32:26,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 23:32:26,978 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 23:32:26,978 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 23:32:26,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 23:32:26,978 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 23:32:26,978 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 23:32:26,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 23:32:26,978 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 23:32:26,978 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 23:32:26,979 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 23:32:26,979 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 23:32:27,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 23:32:27,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 23:32:27,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 23:32:27,200 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 23:32:27,200 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 23:32:27,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test22-1.c [2022-01-10 23:32:27,246 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c8410101/0d102385889c41e28ad0561976d1104d/FLAGb12c2b062 [2022-01-10 23:32:27,585 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 23:32:27,585 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test22-1.c [2022-01-10 23:32:27,590 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c8410101/0d102385889c41e28ad0561976d1104d/FLAGb12c2b062 [2022-01-10 23:32:27,989 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c8410101/0d102385889c41e28ad0561976d1104d [2022-01-10 23:32:27,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 23:32:27,992 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 23:32:27,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 23:32:27,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 23:32:27,995 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 23:32:27,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 11:32:27" (1/1) ... [2022-01-10 23:32:27,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18227778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:27, skipping insertion in model container [2022-01-10 23:32:27,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 11:32:27" (1/1) ... [2022-01-10 23:32:28,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 23:32:28,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 23:32:28,217 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test22-1.c[1029,1042] [2022-01-10 23:32:28,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 23:32:28,225 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 23:32:28,236 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test22-1.c[1029,1042] [2022-01-10 23:32:28,236 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 23:32:28,248 INFO L208 MainTranslator]: Completed translation [2022-01-10 23:32:28,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:28 WrapperNode [2022-01-10 23:32:28,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 23:32:28,250 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 23:32:28,250 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 23:32:28,250 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 23:32:28,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:28" (1/1) ... [2022-01-10 23:32:28,273 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:28" (1/1) ... [2022-01-10 23:32:28,294 INFO L137 Inliner]: procedures = 19, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 100 [2022-01-10 23:32:28,294 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 23:32:28,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 23:32:28,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 23:32:28,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 23:32:28,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:28" (1/1) ... [2022-01-10 23:32:28,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:28" (1/1) ... [2022-01-10 23:32:28,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:28" (1/1) ... [2022-01-10 23:32:28,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:28" (1/1) ... [2022-01-10 23:32:28,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:28" (1/1) ... [2022-01-10 23:32:28,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:28" (1/1) ... [2022-01-10 23:32:28,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:28" (1/1) ... [2022-01-10 23:32:28,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 23:32:28,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 23:32:28,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 23:32:28,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 23:32:28,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:28" (1/1) ... [2022-01-10 23:32:28,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 23:32:28,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 23:32:28,365 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 23:32:28,404 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 23:32:28,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 23:32:28,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 23:32:28,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-01-10 23:32:28,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 23:32:28,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 23:32:28,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 23:32:28,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 23:32:28,488 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 23:32:28,489 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 23:32:28,682 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 23:32:28,685 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 23:32:28,686 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 23:32:28,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:32:28 BoogieIcfgContainer [2022-01-10 23:32:28,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 23:32:28,687 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 23:32:28,687 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 23:32:28,688 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 23:32:28,690 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:32:28" (1/1) ... [2022-01-10 23:32:28,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 11:32:28 BasicIcfg [2022-01-10 23:32:28,744 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 23:32:28,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 23:32:28,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 23:32:28,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 23:32:28,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 11:32:27" (1/4) ... [2022-01-10 23:32:28,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a82662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 11:32:28, skipping insertion in model container [2022-01-10 23:32:28,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:28" (2/4) ... [2022-01-10 23:32:28,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a82662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 11:32:28, skipping insertion in model container [2022-01-10 23:32:28,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:32:28" (3/4) ... [2022-01-10 23:32:28,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a82662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 11:32:28, skipping insertion in model container [2022-01-10 23:32:28,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 11:32:28" (4/4) ... [2022-01-10 23:32:28,749 INFO L111 eAbstractionObserver]: Analyzing ICFG test22-1.cTransformedIcfg [2022-01-10 23:32:28,753 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 23:32:28,753 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 23:32:28,787 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 23:32:28,791 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 23:32:28,792 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 23:32:28,800 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.391304347826087) internal successors, (32), 24 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 23:32:28,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 23:32:28,804 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:32:28,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:32:28,805 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:32:28,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:32:28,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1586389736, now seen corresponding path program 1 times [2022-01-10 23:32:28,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:32:28,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685487102] [2022-01-10 23:32:28,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:32:28,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:32:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:32:29,050 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 23:32:29,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:32:29,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685487102] [2022-01-10 23:32:29,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685487102] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 23:32:29,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 23:32:29,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 23:32:29,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970823251] [2022-01-10 23:32:29,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 23:32:29,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 23:32:29,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:32:29,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 23:32:29,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 23:32:29,083 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.391304347826087) internal successors, (32), 24 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) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 23:32:29,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:32:29,093 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2022-01-10 23:32:29,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 23:32:29,096 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 19 [2022-01-10 23:32:29,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:32:29,101 INFO L225 Difference]: With dead ends: 34 [2022-01-10 23:32:29,101 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 23:32:29,103 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 23:32:29,106 INFO L933 BasicCegarLoop]: 30 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, 30 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 23:32:29,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 23:32:29,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 23:32:29,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-10 23:32:29,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 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 23:32:29,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-01-10 23:32:29,134 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 19 [2022-01-10 23:32:29,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:32:29,135 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-01-10 23:32:29,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 23:32:29,136 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-01-10 23:32:29,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 23:32:29,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:32:29,137 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:32:29,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 23:32:29,137 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:32:29,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:32:29,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1904009934, now seen corresponding path program 1 times [2022-01-10 23:32:29,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:32:29,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728733200] [2022-01-10 23:32:29,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:32:29,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:32:29,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:32:29,386 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 23:32:29,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:32:29,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728733200] [2022-01-10 23:32:29,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728733200] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 23:32:29,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 23:32:29,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-10 23:32:29,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490564719] [2022-01-10 23:32:29,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 23:32:29,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 23:32:29,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:32:29,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 23:32:29,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-01-10 23:32:29,389 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 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 23:32:29,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:32:29,809 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2022-01-10 23:32:29,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 23:32:29,810 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 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 20 [2022-01-10 23:32:29,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:32:29,811 INFO L225 Difference]: With dead ends: 85 [2022-01-10 23:32:29,811 INFO L226 Difference]: Without dead ends: 62 [2022-01-10 23:32:29,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2022-01-10 23:32:29,817 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 136 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 23:32:29,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 112 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 23:32:29,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-10 23:32:29,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 24. [2022-01-10 23:32:29,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 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 23:32:29,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-01-10 23:32:29,833 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 20 [2022-01-10 23:32:29,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:32:29,833 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-01-10 23:32:29,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 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 23:32:29,835 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-01-10 23:32:29,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 23:32:29,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:32:29,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:32:29,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 23:32:29,839 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:32:29,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:32:29,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1398451309, now seen corresponding path program 1 times [2022-01-10 23:32:29,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:32:29,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929884951] [2022-01-10 23:32:29,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:32:29,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:32:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:32:30,692 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 23:32:30,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:32:30,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929884951] [2022-01-10 23:32:30,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929884951] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 23:32:30,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 23:32:30,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-10 23:32:30,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659601606] [2022-01-10 23:32:30,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 23:32:30,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 23:32:30,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:32:30,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 23:32:30,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-10 23:32:30,694 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 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 23:32:31,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:32:31,779 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2022-01-10 23:32:31,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-10 23:32:31,780 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 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 20 [2022-01-10 23:32:31,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:32:31,780 INFO L225 Difference]: With dead ends: 71 [2022-01-10 23:32:31,781 INFO L226 Difference]: Without dead ends: 66 [2022-01-10 23:32:31,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2022-01-10 23:32:31,782 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 191 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 23:32:31,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 73 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 23:32:31,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-10 23:32:31,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 33. [2022-01-10 23:32:31,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 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 23:32:31,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-01-10 23:32:31,788 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 20 [2022-01-10 23:32:31,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:32:31,788 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-01-10 23:32:31,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 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 23:32:31,788 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-01-10 23:32:31,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 23:32:31,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:32:31,789 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:32:31,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 23:32:31,789 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:32:31,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:32:31,790 INFO L85 PathProgramCache]: Analyzing trace with hash -550700237, now seen corresponding path program 1 times [2022-01-10 23:32:31,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:32:31,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555506805] [2022-01-10 23:32:31,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:32:31,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:32:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:32:32,326 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 23:32:32,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:32:32,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555506805] [2022-01-10 23:32:32,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555506805] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 23:32:32,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 23:32:32,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-10 23:32:32,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319797060] [2022-01-10 23:32:32,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 23:32:32,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 23:32:32,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:32:32,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 23:32:32,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-01-10 23:32:32,328 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 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 23:32:33,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:32:33,227 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2022-01-10 23:32:33,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-10 23:32:33,228 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 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 20 [2022-01-10 23:32:33,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:32:33,228 INFO L225 Difference]: With dead ends: 98 [2022-01-10 23:32:33,229 INFO L226 Difference]: Without dead ends: 93 [2022-01-10 23:32:33,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2022-01-10 23:32:33,230 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 123 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 23:32:33,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 211 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 23:32:33,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-10 23:32:33,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 33. [2022-01-10 23:32:33,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 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 23:32:33,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-01-10 23:32:33,236 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 20 [2022-01-10 23:32:33,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:32:33,236 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-01-10 23:32:33,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 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 23:32:33,236 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-01-10 23:32:33,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 23:32:33,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:32:33,237 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:32:33,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 23:32:33,237 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:32:33,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:32:33,240 INFO L85 PathProgramCache]: Analyzing trace with hash -45141612, now seen corresponding path program 1 times [2022-01-10 23:32:33,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:32:33,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041668794] [2022-01-10 23:32:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:32:33,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:32:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:32:33,331 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 23:32:33,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:32:33,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041668794] [2022-01-10 23:32:33,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041668794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 23:32:33,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 23:32:33,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-10 23:32:33,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208392714] [2022-01-10 23:32:33,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 23:32:33,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 23:32:33,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:32:33,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 23:32:33,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-01-10 23:32:33,334 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 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 23:32:33,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:32:33,558 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2022-01-10 23:32:33,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 23:32:33,559 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 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 20 [2022-01-10 23:32:33,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:32:33,559 INFO L225 Difference]: With dead ends: 85 [2022-01-10 23:32:33,559 INFO L226 Difference]: Without dead ends: 68 [2022-01-10 23:32:33,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-01-10 23:32:33,560 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 68 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 23:32:33,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 237 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 23:32:33,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-10 23:32:33,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 26. [2022-01-10 23:32:33,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 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 23:32:33,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-01-10 23:32:33,566 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 20 [2022-01-10 23:32:33,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:32:33,566 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-01-10 23:32:33,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 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 23:32:33,566 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-01-10 23:32:33,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 23:32:33,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:32:33,567 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:32:33,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 23:32:33,567 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:32:33,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:32:33,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1240351127, now seen corresponding path program 1 times [2022-01-10 23:32:33,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:32:33,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28630565] [2022-01-10 23:32:33,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:32:33,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:32:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:32:34,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 23:32:34,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:32:34,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28630565] [2022-01-10 23:32:34,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28630565] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 23:32:34,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761606364] [2022-01-10 23:32:34,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:32:34,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 23:32:34,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 23:32:34,438 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 23:32:34,463 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 23:32:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:32:35,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 80 conjunts are in the unsatisfiable core [2022-01-10 23:32:35,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 23:32:35,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 23:32:35,549 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 21 treesize of output 25 [2022-01-10 23:32:35,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 23:32:35,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-10 23:32:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 23:32:36,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 23:32:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 23:32:37,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761606364] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 23:32:37,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 23:32:37,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 10] total 38 [2022-01-10 23:32:37,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953077899] [2022-01-10 23:32:37,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 23:32:37,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-10 23:32:37,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:32:37,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-10 23:32:37,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1280, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 23:32:37,153 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 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 23:32:45,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:32:45,418 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2022-01-10 23:32:45,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-10 23:32:45,419 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 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 22 [2022-01-10 23:32:45,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:32:45,420 INFO L225 Difference]: With dead ends: 101 [2022-01-10 23:32:45,420 INFO L226 Difference]: Without dead ends: 84 [2022-01-10 23:32:45,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1845 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1528, Invalid=6662, Unknown=0, NotChecked=0, Total=8190 [2022-01-10 23:32:45,422 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 331 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 23:32:45,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 110 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 23:32:45,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-10 23:32:45,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 39. [2022-01-10 23:32:45,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 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 23:32:45,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-01-10 23:32:45,442 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 22 [2022-01-10 23:32:45,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:32:45,443 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-01-10 23:32:45,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 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 23:32:45,443 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-01-10 23:32:45,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 23:32:45,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:32:45,444 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:32:45,449 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 23:32:45,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-10 23:32:45,650 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:32:45,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:32:45,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1981901253, now seen corresponding path program 1 times [2022-01-10 23:32:45,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:32:45,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963042679] [2022-01-10 23:32:45,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:32:45,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:32:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:32:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 23:32:47,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:32:47,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963042679] [2022-01-10 23:32:47,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963042679] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 23:32:47,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250350936] [2022-01-10 23:32:47,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:32:47,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 23:32:47,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 23:32:47,217 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 23:32:47,218 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 23:32:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:32:47,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 77 conjunts are in the unsatisfiable core [2022-01-10 23:32:47,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 23:32:47,579 INFO L353 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2022-01-10 23:32:47,580 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 65 [2022-01-10 23:32:47,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 23:32:47,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-01-10 23:32:47,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 23:32:47,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-01-10 23:32:47,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 23:32:47,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 31 treesize of output 19 [2022-01-10 23:32:47,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 52 treesize of output 42 [2022-01-10 23:32:47,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 23:32:47,670 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 0 case distinctions, treesize of input 37 treesize of output 25 [2022-01-10 23:32:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 23:32:48,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 23:32:50,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 23:32:50,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250350936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 23:32:50,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 23:32:50,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 11] total 39 [2022-01-10 23:32:50,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283036596] [2022-01-10 23:32:50,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 23:32:50,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-10 23:32:50,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:32:50,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-10 23:32:50,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1356, Unknown=0, NotChecked=0, Total=1482 [2022-01-10 23:32:50,951 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 39 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 39 states have internal predecessors, (66), 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 23:33:13,406 WARN L228 SmtUtils]: Spent 7.30s on a formula simplification. DAG size of input: 98 DAG size of output: 87 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-10 23:33:20,305 WARN L228 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 99 DAG size of output: 90 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-10 23:33:28,168 WARN L228 SmtUtils]: Spent 7.04s on a formula simplification. DAG size of input: 105 DAG size of output: 94 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)