/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/recursive-simple/fibo_7-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 00:13:02,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 00:13:02,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 00:13:02,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 00:13:02,773 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 00:13:02,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 00:13:02,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 00:13:02,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 00:13:02,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 00:13:02,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 00:13:02,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 00:13:02,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 00:13:02,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 00:13:02,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 00:13:02,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 00:13:02,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 00:13:02,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 00:13:02,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 00:13:02,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 00:13:02,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 00:13:02,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 00:13:02,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 00:13:02,816 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 00:13:02,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 00:13:02,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 00:13:02,819 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 00:13:02,819 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 00:13:02,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 00:13:02,820 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 00:13:02,821 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 00:13:02,821 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 00:13:02,822 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 00:13:02,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 00:13:02,823 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 00:13:02,824 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 00:13:02,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 00:13:02,825 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 00:13:02,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 00:13:02,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 00:13:02,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 00:13:02,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 00:13:02,833 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 [2022-01-11 00:13:02,865 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 00:13:02,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 00:13:02,866 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 00:13:02,866 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 00:13:02,867 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 00:13:02,867 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 00:13:02,867 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 00:13:02,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 00:13:02,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 00:13:02,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 00:13:02,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 00:13:02,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 00:13:02,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 00:13:02,868 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 00:13:02,868 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 00:13:02,869 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 00:13:02,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 00:13:02,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 00:13:02,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 00:13:02,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 00:13:02,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 00:13:02,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 00:13:02,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 00:13:02,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 00:13:02,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 00:13:02,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 00:13:02,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 00:13:02,870 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 00:13:02,870 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 00:13:02,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 00:13:02,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 00:13:02,871 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 00:13:02,871 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 00:13:02,871 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 00:13:03,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 00:13:03,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 00:13:03,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 00:13:03,122 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 00:13:03,123 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 00:13:03,124 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_7-2.c [2022-01-11 00:13:03,179 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2701b4ecb/a205de168d9742d78ea954d894eb7dc2/FLAG894639ace [2022-01-11 00:13:03,526 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 00:13:03,527 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_7-2.c [2022-01-11 00:13:03,536 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2701b4ecb/a205de168d9742d78ea954d894eb7dc2/FLAG894639ace [2022-01-11 00:13:03,552 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2701b4ecb/a205de168d9742d78ea954d894eb7dc2 [2022-01-11 00:13:03,555 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 00:13:03,557 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 00:13:03,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 00:13:03,560 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 00:13:03,563 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 00:13:03,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:13:03" (1/1) ... [2022-01-11 00:13:03,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e71a367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:13:03, skipping insertion in model container [2022-01-11 00:13:03,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:13:03" (1/1) ... [2022-01-11 00:13:03,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 00:13:03,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 00:13:03,799 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_7-2.c[741,754] [2022-01-11 00:13:03,803 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 00:13:03,822 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 00:13:03,844 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_7-2.c[741,754] [2022-01-11 00:13:03,846 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 00:13:03,858 INFO L208 MainTranslator]: Completed translation [2022-01-11 00:13:03,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:13:03 WrapperNode [2022-01-11 00:13:03,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 00:13:03,860 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 00:13:03,860 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 00:13:03,860 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 00:13:03,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:13:03" (1/1) ... [2022-01-11 00:13:03,873 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:13:03" (1/1) ... [2022-01-11 00:13:03,887 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-11 00:13:03,888 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 00:13:03,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 00:13:03,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 00:13:03,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 00:13:03,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:13:03" (1/1) ... [2022-01-11 00:13:03,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:13:03" (1/1) ... [2022-01-11 00:13:03,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:13:03" (1/1) ... [2022-01-11 00:13:03,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:13:03" (1/1) ... [2022-01-11 00:13:03,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:13:03" (1/1) ... [2022-01-11 00:13:03,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:13:03" (1/1) ... [2022-01-11 00:13:03,910 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:13:03" (1/1) ... [2022-01-11 00:13:03,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 00:13:03,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 00:13:03,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 00:13:03,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 00:13:03,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:13:03" (1/1) ... [2022-01-11 00:13:03,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 00:13:03,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:13:03,945 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-11 00:13:03,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-11 00:13:03,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 00:13:03,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 00:13:03,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 00:13:03,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 00:13:03,983 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-01-11 00:13:03,983 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-01-11 00:13:04,036 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 00:13:04,037 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 00:13:04,124 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 00:13:04,128 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 00:13:04,128 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-11 00:13:04,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:13:04 BoogieIcfgContainer [2022-01-11 00:13:04,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 00:13:04,131 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 00:13:04,131 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 00:13:04,132 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 00:13:04,134 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:13:04" (1/1) ... [2022-01-11 00:13:04,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:13:04 BasicIcfg [2022-01-11 00:13:04,185 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 00:13:04,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 00:13:04,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 00:13:04,188 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 00:13:04,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 12:13:03" (1/4) ... [2022-01-11 00:13:04,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e34c59e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:13:04, skipping insertion in model container [2022-01-11 00:13:04,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:13:03" (2/4) ... [2022-01-11 00:13:04,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e34c59e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:13:04, skipping insertion in model container [2022-01-11 00:13:04,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:13:04" (3/4) ... [2022-01-11 00:13:04,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e34c59e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 12:13:04, skipping insertion in model container [2022-01-11 00:13:04,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:13:04" (4/4) ... [2022-01-11 00:13:04,190 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_7-2.cTransformedIcfg [2022-01-11 00:13:04,194 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 00:13:04,195 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 00:13:04,227 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 00:13:04,232 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-11 00:13:04,232 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 00:13:04,268 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-11 00:13:04,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-11 00:13:04,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:13:04,273 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:13:04,273 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:13:04,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:13:04,278 INFO L85 PathProgramCache]: Analyzing trace with hash 2142902620, now seen corresponding path program 1 times [2022-01-11 00:13:04,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:13:04,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896109985] [2022-01-11 00:13:04,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:13:04,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:13:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:04,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:13:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 00:13:04,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:13:04,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896109985] [2022-01-11 00:13:04,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896109985] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:13:04,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 00:13:04,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 00:13:04,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54973195] [2022-01-11 00:13:04,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:13:04,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 00:13:04,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:13:04,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 00:13:04,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 00:13:04,622 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 00:13:04,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:13:04,667 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-01-11 00:13:04,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 00:13:04,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-11 00:13:04,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:13:04,676 INFO L225 Difference]: With dead ends: 33 [2022-01-11 00:13:04,676 INFO L226 Difference]: Without dead ends: 17 [2022-01-11 00:13:04,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 00:13:04,683 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 00:13:04,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 74 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 00:13:04,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-11 00:13:04,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-11 00:13:04,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-11 00:13:04,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-11 00:13:04,719 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-01-11 00:13:04,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:13:04,720 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-11 00:13:04,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 00:13:04,720 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-11 00:13:04,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 00:13:04,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:13:04,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:13:04,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 00:13:04,724 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:13:04,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:13:04,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1380246405, now seen corresponding path program 1 times [2022-01-11 00:13:04,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:13:04,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802972677] [2022-01-11 00:13:04,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:13:04,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:13:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:04,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:13:04,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 00:13:04,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:13:04,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802972677] [2022-01-11 00:13:04,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802972677] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:13:04,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 00:13:04,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 00:13:04,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995301677] [2022-01-11 00:13:04,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:13:04,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 00:13:04,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:13:04,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 00:13:04,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 00:13:04,839 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 00:13:04,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:13:04,905 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-01-11 00:13:04,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 00:13:04,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-11 00:13:04,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:13:04,907 INFO L225 Difference]: With dead ends: 23 [2022-01-11 00:13:04,907 INFO L226 Difference]: Without dead ends: 19 [2022-01-11 00:13:04,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-11 00:13:04,908 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 00:13:04,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 30 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 00:13:04,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-11 00:13:04,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-01-11 00:13:04,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-11 00:13:04,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-11 00:13:04,914 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2022-01-11 00:13:04,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:13:04,914 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-11 00:13:04,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 00:13:04,915 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-11 00:13:04,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 00:13:04,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:13:04,916 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:13:04,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 00:13:04,916 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:13:04,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:13:04,917 INFO L85 PathProgramCache]: Analyzing trace with hash -794894887, now seen corresponding path program 1 times [2022-01-11 00:13:04,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:13:04,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520048134] [2022-01-11 00:13:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:13:04,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:13:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:04,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:13:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:05,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:05,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:13:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 00:13:05,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:13:05,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520048134] [2022-01-11 00:13:05,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520048134] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:13:05,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249218837] [2022-01-11 00:13:05,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:13:05,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:13:05,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:13:05,175 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:13:05,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 00:13:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:05,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 00:13:05,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:13:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-11 00:13:05,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-11 00:13:05,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249218837] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:13:05,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-11 00:13:05,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-01-11 00:13:05,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421206460] [2022-01-11 00:13:05,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:13:05,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-11 00:13:05,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:13:05,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-11 00:13:05,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-01-11 00:13:05,434 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-11 00:13:05,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:13:05,471 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2022-01-11 00:13:05,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 00:13:05,471 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-01-11 00:13:05,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:13:05,473 INFO L225 Difference]: With dead ends: 28 [2022-01-11 00:13:05,473 INFO L226 Difference]: Without dead ends: 24 [2022-01-11 00:13:05,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-01-11 00:13:05,476 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 00:13:05,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 93 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 00:13:05,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-11 00:13:05,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2022-01-11 00:13:05,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-01-11 00:13:05,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2022-01-11 00:13:05,482 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 22 [2022-01-11 00:13:05,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:13:05,482 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2022-01-11 00:13:05,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-11 00:13:05,483 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2022-01-11 00:13:05,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-11 00:13:05,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:13:05,484 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:13:05,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-11 00:13:05,699 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 [2022-01-11 00:13:05,700 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:13:05,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:13:05,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1731891524, now seen corresponding path program 1 times [2022-01-11 00:13:05,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:13:05,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271728128] [2022-01-11 00:13:05,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:13:05,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:13:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:05,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:13:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:05,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:05,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:05,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:13:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:05,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 00:13:05,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:13:05,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271728128] [2022-01-11 00:13:05,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271728128] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:13:05,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737407881] [2022-01-11 00:13:05,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:13:05,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:13:05,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:13:05,889 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:13:05,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 00:13:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:05,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 00:13:05,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:13:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-11 00:13:06,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:13:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 00:13:06,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737407881] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:13:06,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:13:06,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-01-11 00:13:06,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653742831] [2022-01-11 00:13:06,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:13:06,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-11 00:13:06,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:13:06,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-11 00:13:06,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-11 00:13:06,655 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 12 states, 10 states have (on average 2.8) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-11 00:13:06,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:13:06,842 INFO L93 Difference]: Finished difference Result 46 states and 77 transitions. [2022-01-11 00:13:06,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 00:13:06,843 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 23 [2022-01-11 00:13:06,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:13:06,844 INFO L225 Difference]: With dead ends: 46 [2022-01-11 00:13:06,844 INFO L226 Difference]: Without dead ends: 28 [2022-01-11 00:13:06,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-01-11 00:13:06,846 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 00:13:06,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 63 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 00:13:06,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-11 00:13:06,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-11 00:13:06,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (20), 8 states have call predecessors, (20), 5 states have call successors, (20) [2022-01-11 00:13:06,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 44 transitions. [2022-01-11 00:13:06,855 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 44 transitions. Word has length 23 [2022-01-11 00:13:06,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:13:06,855 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 44 transitions. [2022-01-11 00:13:06,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-11 00:13:06,858 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 44 transitions. [2022-01-11 00:13:06,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-11 00:13:06,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:13:06,860 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:13:06,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 00:13:07,084 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 [2022-01-11 00:13:07,084 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:13:07,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:13:07,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1995795547, now seen corresponding path program 2 times [2022-01-11 00:13:07,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:13:07,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503129152] [2022-01-11 00:13:07,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:13:07,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:13:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:07,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:13:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:07,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:07,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:13:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:07,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:07,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:13:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-11 00:13:07,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:13:07,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503129152] [2022-01-11 00:13:07,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503129152] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:13:07,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183621905] [2022-01-11 00:13:07,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 00:13:07,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:13:07,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:13:07,292 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:13:07,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 00:13:07,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 00:13:07,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:13:07,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 00:13:07,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:13:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-11 00:13:10,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:13:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-11 00:13:11,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183621905] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:13:11,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:13:11,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 18 [2022-01-11 00:13:11,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677419995] [2022-01-11 00:13:11,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:13:11,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-11 00:13:11,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:13:11,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-11 00:13:11,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=252, Unknown=1, NotChecked=0, Total=306 [2022-01-11 00:13:11,106 INFO L87 Difference]: Start difference. First operand 28 states and 44 transitions. Second operand has 18 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 8 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2022-01-11 00:13:13,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:13:13,685 INFO L93 Difference]: Finished difference Result 65 states and 134 transitions. [2022-01-11 00:13:13,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 00:13:13,686 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 8 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) Word has length 35 [2022-01-11 00:13:13,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:13:13,688 INFO L225 Difference]: With dead ends: 65 [2022-01-11 00:13:13,688 INFO L226 Difference]: Without dead ends: 40 [2022-01-11 00:13:13,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=100, Invalid=405, Unknown=1, NotChecked=0, Total=506 [2022-01-11 00:13:13,690 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 00:13:13,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 123 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 180 Invalid, 0 Unknown, 16 Unchecked, 0.3s Time] [2022-01-11 00:13:13,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-11 00:13:13,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2022-01-11 00:13:13,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 6 states have call successors, (6), 1 states have call predecessors, (6), 7 states have return successors, (32), 10 states have call predecessors, (32), 6 states have call successors, (32) [2022-01-11 00:13:13,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 60 transitions. [2022-01-11 00:13:13,701 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 60 transitions. Word has length 35 [2022-01-11 00:13:13,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:13:13,702 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 60 transitions. [2022-01-11 00:13:13,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 8 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2022-01-11 00:13:13,702 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 60 transitions. [2022-01-11 00:13:13,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-11 00:13:13,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:13:13,704 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:13:13,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-11 00:13:13,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:13:13,905 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:13:13,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:13:13,905 INFO L85 PathProgramCache]: Analyzing trace with hash -176654579, now seen corresponding path program 3 times [2022-01-11 00:13:13,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:13:13,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592311288] [2022-01-11 00:13:13,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:13:13,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:13:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:13,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:13:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:14,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:14,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:14,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:14,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:14,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:13:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-11 00:13:14,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:13:14,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592311288] [2022-01-11 00:13:14,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592311288] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:13:14,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429655115] [2022-01-11 00:13:14,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 00:13:14,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:13:14,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:13:14,150 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:13:14,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 00:13:14,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-11 00:13:14,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:13:14,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 00:13:14,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:13:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-11 00:13:14,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:13:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-11 00:13:14,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429655115] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:13:14,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:13:14,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 19 [2022-01-11 00:13:14,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516165935] [2022-01-11 00:13:14,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:13:14,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-11 00:13:14,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:13:14,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-11 00:13:14,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-11 00:13:14,875 INFO L87 Difference]: Start difference. First operand 34 states and 60 transitions. Second operand has 19 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2022-01-11 00:13:15,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:13:15,496 INFO L93 Difference]: Finished difference Result 98 states and 204 transitions. [2022-01-11 00:13:15,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-11 00:13:15,498 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) Word has length 35 [2022-01-11 00:13:15,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:13:15,500 INFO L225 Difference]: With dead ends: 98 [2022-01-11 00:13:15,500 INFO L226 Difference]: Without dead ends: 67 [2022-01-11 00:13:15,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=620, Unknown=0, NotChecked=0, Total=812 [2022-01-11 00:13:15,502 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 58 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 00:13:15,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 71 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-11 00:13:15,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-11 00:13:15,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2022-01-11 00:13:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 9 states have call successors, (9), 4 states have call predecessors, (9), 12 states have return successors, (42), 15 states have call predecessors, (42), 9 states have call successors, (42) [2022-01-11 00:13:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 92 transitions. [2022-01-11 00:13:15,515 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 92 transitions. Word has length 35 [2022-01-11 00:13:15,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:13:15,515 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 92 transitions. [2022-01-11 00:13:15,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2022-01-11 00:13:15,516 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 92 transitions. [2022-01-11 00:13:15,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-11 00:13:15,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:13:15,518 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:13:15,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-11 00:13:15,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:13:15,728 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:13:15,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:13:15,728 INFO L85 PathProgramCache]: Analyzing trace with hash 103619678, now seen corresponding path program 4 times [2022-01-11 00:13:15,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:13:15,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794743035] [2022-01-11 00:13:15,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:13:15,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:13:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:15,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:13:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:15,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:15,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:15,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:13:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:15,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-11 00:13:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:13:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:13:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 62 proven. 28 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-01-11 00:13:16,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:13:16,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794743035] [2022-01-11 00:13:16,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794743035] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:13:16,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108849910] [2022-01-11 00:13:16,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 00:13:16,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:13:16,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:13:16,063 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:13:16,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-11 00:13:16,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 00:13:16,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:13:16,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-11 00:13:16,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:13:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 90 proven. 46 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-01-11 00:13:16,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:13:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 90 proven. 75 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-11 00:13:17,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108849910] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:13:17,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:13:17,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 13] total 24 [2022-01-11 00:13:17,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68016354] [2022-01-11 00:13:17,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:13:17,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-11 00:13:17,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:13:17,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-11 00:13:17,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-01-11 00:13:17,682 INFO L87 Difference]: Start difference. First operand 58 states and 92 transitions. Second operand has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 24 states have internal predecessors, (56), 12 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (22), 13 states have call predecessors, (22), 12 states have call successors, (22) [2022-01-11 00:13:18,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:13:18,321 INFO L93 Difference]: Finished difference Result 116 states and 185 transitions. [2022-01-11 00:13:18,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-11 00:13:18,325 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 24 states have internal predecessors, (56), 12 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (22), 13 states have call predecessors, (22), 12 states have call successors, (22) Word has length 71 [2022-01-11 00:13:18,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:13:18,326 INFO L225 Difference]: With dead ends: 116 [2022-01-11 00:13:18,326 INFO L226 Difference]: Without dead ends: 59 [2022-01-11 00:13:18,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2022-01-11 00:13:18,328 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 54 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-11 00:13:18,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 202 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-11 00:13:18,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-11 00:13:18,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2022-01-11 00:13:18,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 6 states have call successors, (6), 4 states have call predecessors, (6), 10 states have return successors, (23), 11 states have call predecessors, (23), 6 states have call successors, (23) [2022-01-11 00:13:18,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2022-01-11 00:13:18,341 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 71 [2022-01-11 00:13:18,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:13:18,341 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2022-01-11 00:13:18,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 24 states have internal predecessors, (56), 12 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (22), 13 states have call predecessors, (22), 12 states have call successors, (22) [2022-01-11 00:13:18,341 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2022-01-11 00:13:18,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-11 00:13:18,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:13:18,345 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 16, 9, 9, 9, 9, 9, 9, 7, 3, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:13:18,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-11 00:13:18,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:13:18,555 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:13:18,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:13:18,556 INFO L85 PathProgramCache]: Analyzing trace with hash 536940144, now seen corresponding path program 5 times [2022-01-11 00:13:18,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:13:18,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593609913] [2022-01-11 00:13:18,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:13:18,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:13:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:18,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:13:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:18,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:18,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:18,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:18,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:18,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:13:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:18,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:13:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:18,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:18,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:18,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:18,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:18,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:18,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:18,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:18,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:18,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:13:18,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:18,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:13:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:18,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:18,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:18,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:19,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:19,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:13:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:19,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:13:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 59 proven. 181 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-01-11 00:13:19,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:13:19,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593609913] [2022-01-11 00:13:19,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593609913] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:13:19,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487951843] [2022-01-11 00:13:19,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-11 00:13:19,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:13:19,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:13:19,012 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:13:19,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-11 00:13:19,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-01-11 00:13:19,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:13:19,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-11 00:13:19,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:13:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 288 proven. 118 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-01-11 00:13:20,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:13:24,700 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 277 proven. 106 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-01-11 00:13:24,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487951843] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:13:24,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:13:24,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 14] total 35 [2022-01-11 00:13:24,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747967926] [2022-01-11 00:13:24,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:13:24,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-11 00:13:24,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:13:24,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-11 00:13:24,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2022-01-11 00:13:24,703 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 35 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 32 states have internal predecessors, (69), 16 states have call successors, (23), 1 states have call predecessors, (23), 14 states have return successors, (26), 17 states have call predecessors, (26), 16 states have call successors, (26) [2022-01-11 00:13:26,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:13:26,938 INFO L93 Difference]: Finished difference Result 121 states and 212 transitions. [2022-01-11 00:13:26,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-11 00:13:26,939 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 32 states have internal predecessors, (69), 16 states have call successors, (23), 1 states have call predecessors, (23), 14 states have return successors, (26), 17 states have call predecessors, (26), 16 states have call successors, (26) Word has length 125 [2022-01-11 00:13:26,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:13:26,940 INFO L225 Difference]: With dead ends: 121 [2022-01-11 00:13:26,941 INFO L226 Difference]: Without dead ends: 68 [2022-01-11 00:13:26,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=520, Invalid=1832, Unknown=0, NotChecked=0, Total=2352 [2022-01-11 00:13:26,942 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 97 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-11 00:13:26,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 167 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-11 00:13:26,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-11 00:13:26,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2022-01-11 00:13:26,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 44 states have internal predecessors, (50), 9 states have call successors, (9), 8 states have call predecessors, (9), 10 states have return successors, (29), 12 states have call predecessors, (29), 9 states have call successors, (29) [2022-01-11 00:13:26,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 88 transitions. [2022-01-11 00:13:26,959 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 88 transitions. Word has length 125 [2022-01-11 00:13:26,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:13:26,959 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 88 transitions. [2022-01-11 00:13:26,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 32 states have internal predecessors, (69), 16 states have call successors, (23), 1 states have call predecessors, (23), 14 states have return successors, (26), 17 states have call predecessors, (26), 16 states have call successors, (26) [2022-01-11 00:13:26,960 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 88 transitions. [2022-01-11 00:13:26,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-11 00:13:26,964 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:13:26,964 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 19, 12, 12, 12, 12, 12, 12, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:13:26,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-11 00:13:27,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:13:27,169 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:13:27,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:13:27,170 INFO L85 PathProgramCache]: Analyzing trace with hash 686923417, now seen corresponding path program 6 times [2022-01-11 00:13:27,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:13:27,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614749642] [2022-01-11 00:13:27,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:13:27,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:13:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:13:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:27,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:27,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:13:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-11 00:13:27,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:13:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-11 00:13:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:13:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-11 00:13:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:27,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1569 backedges. 63 proven. 360 refuted. 0 times theorem prover too weak. 1146 trivial. 0 not checked. [2022-01-11 00:13:27,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:13:27,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614749642] [2022-01-11 00:13:27,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614749642] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:13:27,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158716324] [2022-01-11 00:13:27,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-11 00:13:27,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:13:27,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:13:27,777 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:13:27,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-11 00:13:28,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-11 00:13:28,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:13:28,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-11 00:13:28,084 INFO L286 TraceCheckSpWp]: Computing forward predicates...