/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 05:59:55,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 05:59:55,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 05:59:55,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 05:59:55,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 05:59:55,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 05:59:55,619 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 05:59:55,621 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 05:59:55,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 05:59:55,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 05:59:55,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 05:59:55,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 05:59:55,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 05:59:55,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 05:59:55,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 05:59:55,628 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 05:59:55,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 05:59:55,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 05:59:55,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 05:59:55,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 05:59:55,631 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 05:59:55,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 05:59:55,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 05:59:55,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 05:59:55,639 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 05:59:55,639 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 05:59:55,639 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 05:59:55,640 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 05:59:55,640 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 05:59:55,641 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 05:59:55,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 05:59:55,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 05:59:55,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 05:59:55,642 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 05:59:55,643 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 05:59:55,643 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 05:59:55,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 05:59:55,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 05:59:55,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 05:59:55,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 05:59:55,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 05:59:55,659 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 05:59:55,672 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 05:59:55,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 05:59:55,673 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 05:59:55,673 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 05:59:55,673 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 05:59:55,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 05:59:55,674 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 05:59:55,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 05:59:55,674 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 05:59:55,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 05:59:55,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 05:59:55,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 05:59:55,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 05:59:55,674 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 05:59:55,674 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 05:59:55,674 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 05:59:55,675 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 05:59:55,675 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 05:59:55,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 05:59:55,675 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 05:59:55,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 05:59:55,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:59:55,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 05:59:55,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 05:59:55,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 05:59:55,679 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 05:59:55,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 05:59:55,679 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 05:59:55,679 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 05:59:55,680 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 05:59:55,680 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 05:59:55,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 05:59:55,681 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 05:59:55,681 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 05:59:55,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 05:59:55,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 05:59:55,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 05:59:55,892 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 05:59:55,893 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 05:59:55,894 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2022-01-11 05:59:55,952 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/715454e20/7bc359e628e0474384081453d87abbf1/FLAG5b89380ec [2022-01-11 05:59:56,281 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 05:59:56,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2022-01-11 05:59:56,285 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/715454e20/7bc359e628e0474384081453d87abbf1/FLAG5b89380ec [2022-01-11 05:59:56,733 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/715454e20/7bc359e628e0474384081453d87abbf1 [2022-01-11 05:59:56,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 05:59:56,736 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 05:59:56,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 05:59:56,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 05:59:56,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 05:59:56,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:59:56" (1/1) ... [2022-01-11 05:59:56,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@743b9992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:56, skipping insertion in model container [2022-01-11 05:59:56,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:59:56" (1/1) ... [2022-01-11 05:59:56,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 05:59:56,753 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 05:59:56,857 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_2calls_5-1.c[946,959] [2022-01-11 05:59:56,859 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:59:56,873 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 05:59:56,892 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_2calls_5-1.c[946,959] [2022-01-11 05:59:56,893 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:59:56,901 INFO L208 MainTranslator]: Completed translation [2022-01-11 05:59:56,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:56 WrapperNode [2022-01-11 05:59:56,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 05:59:56,902 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 05:59:56,902 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 05:59:56,902 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 05:59:56,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:56" (1/1) ... [2022-01-11 05:59:56,912 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:56" (1/1) ... [2022-01-11 05:59:56,921 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-11 05:59:56,921 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 05:59:56,922 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 05:59:56,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 05:59:56,922 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 05:59:56,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:56" (1/1) ... [2022-01-11 05:59:56,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:56" (1/1) ... [2022-01-11 05:59:56,935 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:56" (1/1) ... [2022-01-11 05:59:56,936 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:56" (1/1) ... [2022-01-11 05:59:56,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:56" (1/1) ... [2022-01-11 05:59:56,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:56" (1/1) ... [2022-01-11 05:59:56,940 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:56" (1/1) ... [2022-01-11 05:59:56,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 05:59:56,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 05:59:56,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 05:59:56,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 05:59:56,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:56" (1/1) ... [2022-01-11 05:59:56,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:59:56,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:59:56,970 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-11 05:59:56,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-11 05:59:57,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 05:59:57,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 05:59:57,004 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2022-01-11 05:59:57,004 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2022-01-11 05:59:57,005 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2022-01-11 05:59:57,005 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2022-01-11 05:59:57,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 05:59:57,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 05:59:57,043 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 05:59:57,044 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 05:59:57,129 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 05:59:57,133 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 05:59:57,133 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-11 05:59:57,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:59:57 BoogieIcfgContainer [2022-01-11 05:59:57,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 05:59:57,135 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 05:59:57,135 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 05:59:57,136 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 05:59:57,138 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:59:57" (1/1) ... [2022-01-11 05:59:57,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:59:57 BasicIcfg [2022-01-11 05:59:57,192 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 05:59:57,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 05:59:57,194 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 05:59:57,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 05:59:57,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 05:59:56" (1/4) ... [2022-01-11 05:59:57,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ad8d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:59:57, skipping insertion in model container [2022-01-11 05:59:57,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:56" (2/4) ... [2022-01-11 05:59:57,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ad8d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:59:57, skipping insertion in model container [2022-01-11 05:59:57,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:59:57" (3/4) ... [2022-01-11 05:59:57,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ad8d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 05:59:57, skipping insertion in model container [2022-01-11 05:59:57,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:59:57" (4/4) ... [2022-01-11 05:59:57,199 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.cTransformedIcfg [2022-01-11 05:59:57,202 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 05:59:57,202 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 05:59:57,271 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 05:59:57,275 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-11 05:59:57,276 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 05:59:57,300 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-11 05:59:57,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-11 05:59:57,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:59:57,303 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:59:57,304 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:59:57,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:59:57,307 INFO L85 PathProgramCache]: Analyzing trace with hash 409070419, now seen corresponding path program 1 times [2022-01-11 05:59:57,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:59:57,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427695389] [2022-01-11 05:59:57,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:59:57,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:59:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:57,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:59:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:59:57,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:59:57,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427695389] [2022-01-11 05:59:57,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427695389] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:59:57,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:59:57,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 05:59:57,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003341158] [2022-01-11 05:59:57,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:59:57,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 05:59:57,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:59:57,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 05:59:57,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 05:59:57,580 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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 05:59:57,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:59:57,655 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-01-11 05:59:57,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 05:59:57,657 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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 05:59:57,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:59:57,665 INFO L225 Difference]: With dead ends: 37 [2022-01-11 05:59:57,666 INFO L226 Difference]: Without dead ends: 25 [2022-01-11 05:59:57,680 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 05:59:57,683 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 05:59:57,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 82 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 05:59:57,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-11 05:59:57,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-11 05:59:57,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-11 05:59:57,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-11 05:59:57,717 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 10 [2022-01-11 05:59:57,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:59:57,718 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-11 05:59:57,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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 05:59:57,718 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-11 05:59:57,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 05:59:57,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:59:57,721 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:59:57,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 05:59:57,721 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:59:57,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:59:57,722 INFO L85 PathProgramCache]: Analyzing trace with hash 697486659, now seen corresponding path program 1 times [2022-01-11 05:59:57,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:59:57,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085060542] [2022-01-11 05:59:57,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:59:57,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:59:57,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:57,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:59:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:59:57,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:59:57,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085060542] [2022-01-11 05:59:57,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085060542] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:59:57,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:59:57,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 05:59:57,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099032701] [2022-01-11 05:59:57,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:59:57,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 05:59:57,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:59:57,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 05:59:57,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 05:59:57,798 INFO L87 Difference]: Start difference. First operand 25 states and 32 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 05:59:57,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:59:57,834 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-01-11 05:59:57,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 05:59:57,835 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 05:59:57,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:59:57,835 INFO L225 Difference]: With dead ends: 31 [2022-01-11 05:59:57,835 INFO L226 Difference]: Without dead ends: 27 [2022-01-11 05:59:57,836 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 05:59:57,837 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 05:59:57,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 05:59:57,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-11 05:59:57,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-01-11 05:59:57,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-11 05:59:57,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-11 05:59:57,842 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 11 [2022-01-11 05:59:57,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:59:57,842 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-11 05:59:57,842 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 05:59:57,842 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-11 05:59:57,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 05:59:57,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:59:57,843 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:59:57,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 05:59:57,843 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:59:57,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:59:57,844 INFO L85 PathProgramCache]: Analyzing trace with hash 63510830, now seen corresponding path program 1 times [2022-01-11 05:59:57,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:59:57,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476284515] [2022-01-11 05:59:57,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:59:57,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:59:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:57,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:59:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:58,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:58,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 05:59:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:58,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 05:59:58,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:59:58,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476284515] [2022-01-11 05:59:58,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476284515] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:59:58,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296566609] [2022-01-11 05:59:58,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:59:58,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:59:58,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:59:58,050 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:59:58,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 05:59:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:58,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-11 05:59:58,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:59:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 05:59:58,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:59:58,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 05:59:58,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296566609] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:59:58,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:59:58,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-01-11 05:59:58,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170342584] [2022-01-11 05:59:58,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:59:58,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-11 05:59:58,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:59:58,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-11 05:59:58,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-01-11 05:59:58,870 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 15 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 14 states have internal predecessors, (28), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-11 05:59:59,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:59:59,029 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2022-01-11 05:59:59,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 05:59:59,030 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 14 states have internal predecessors, (28), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 22 [2022-01-11 05:59:59,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:59:59,031 INFO L225 Difference]: With dead ends: 37 [2022-01-11 05:59:59,031 INFO L226 Difference]: Without dead ends: 33 [2022-01-11 05:59:59,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-11 05:59:59,032 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 30 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:59:59,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 97 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 05:59:59,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-11 05:59:59,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2022-01-11 05:59:59,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-11 05:59:59,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-01-11 05:59:59,037 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 22 [2022-01-11 05:59:59,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:59:59,037 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-01-11 05:59:59,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 14 states have internal predecessors, (28), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-11 05:59:59,038 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-01-11 05:59:59,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-11 05:59:59,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:59:59,039 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:59:59,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-11 05:59:59,251 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 05:59:59,252 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:59:59,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:59:59,252 INFO L85 PathProgramCache]: Analyzing trace with hash -992157507, now seen corresponding path program 1 times [2022-01-11 05:59:59,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:59:59,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126954259] [2022-01-11 05:59:59,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:59:59,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:59:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:59,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:59:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:59,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:59,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 05:59:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:59,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 05:59:59,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:59:59,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126954259] [2022-01-11 05:59:59,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126954259] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:59:59,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917756983] [2022-01-11 05:59:59,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:59:59,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:59:59,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:59:59,396 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:59:59,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 05:59:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:59,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 05:59:59,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:59:59,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 05:59:59,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:59:59,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 05:59:59,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917756983] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:59:59,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:59:59,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-11 05:59:59,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250918183] [2022-01-11 05:59:59,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:59:59,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-11 05:59:59,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:59:59,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-11 05:59:59,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-11 05:59:59,745 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 13 states, 10 states have (on average 2.7) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-11 05:59:59,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:59:59,878 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2022-01-11 05:59:59,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-11 05:59:59,879 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.7) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 23 [2022-01-11 05:59:59,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:59:59,882 INFO L225 Difference]: With dead ends: 63 [2022-01-11 05:59:59,882 INFO L226 Difference]: Without dead ends: 37 [2022-01-11 05:59:59,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-11 05:59:59,885 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:59:59,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 101 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 05:59:59,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-11 05:59:59,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2022-01-11 05:59:59,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-01-11 05:59:59,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2022-01-11 05:59:59,902 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 23 [2022-01-11 05:59:59,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:59:59,902 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2022-01-11 05:59:59,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.7) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-11 05:59:59,902 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2022-01-11 05:59:59,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-11 05:59:59,903 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:59:59,904 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:59:59,921 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 06:00:00,104 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 06:00:00,104 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:00,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:00,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1662558092, now seen corresponding path program 1 times [2022-01-11 06:00:00,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:00,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51467776] [2022-01-11 06:00:00,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:00,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:00,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:00,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:00,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:00,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:00:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:00,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-11 06:00:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 06:00:00,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:00,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51467776] [2022-01-11 06:00:00,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51467776] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:00,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808968345] [2022-01-11 06:00:00,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:00,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:00,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:00,361 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 06:00:00,362 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 06:00:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:00,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-11 06:00:00,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:00,567 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-11 06:00:00,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-11 06:00:00,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808968345] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:00:00,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-11 06:00:00,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 15 [2022-01-11 06:00:00,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452470068] [2022-01-11 06:00:00,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:00:00,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-11 06:00:00,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:00,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-11 06:00:00,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-11 06:00:00,569 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand has 8 states, 6 states have (on average 3.5) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-11 06:00:00,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:00,660 INFO L93 Difference]: Finished difference Result 63 states and 100 transitions. [2022-01-11 06:00:00,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-11 06:00:00,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.5) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 4 states have call successors, (5) Word has length 34 [2022-01-11 06:00:00,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:00,661 INFO L225 Difference]: With dead ends: 63 [2022-01-11 06:00:00,661 INFO L226 Difference]: Without dead ends: 34 [2022-01-11 06:00:00,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-11 06:00:00,662 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:00,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 94 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 06:00:00,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-11 06:00:00,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-11 06:00:00,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.2) internal successors, (24), 23 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2022-01-11 06:00:00,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2022-01-11 06:00:00,668 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 34 [2022-01-11 06:00:00,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:00,668 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2022-01-11 06:00:00,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.5) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-11 06:00:00,668 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2022-01-11 06:00:00,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-11 06:00:00,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:00,669 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:00,687 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 06:00:00,885 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 06:00:00,885 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:00,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:00,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1759393138, now seen corresponding path program 1 times [2022-01-11 06:00:00,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:00,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36022851] [2022-01-11 06:00:00,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:00,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:00,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:00,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:00,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:01,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:01,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:01,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-11 06:00:01,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:01,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36022851] [2022-01-11 06:00:01,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36022851] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:01,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726477288] [2022-01-11 06:00:01,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:01,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:01,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:01,067 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 06:00:01,105 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 06:00:01,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:01,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 06:00:01,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-11 06:00:01,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:00:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 06:00:01,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726477288] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:00:01,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:00:01,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 19 [2022-01-11 06:00:01,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897975302] [2022-01-11 06:00:01,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:00:01,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-11 06:00:01,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:01,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-11 06:00:01,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-11 06:00:01,715 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand has 19 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-11 06:00:02,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:02,163 INFO L93 Difference]: Finished difference Result 97 states and 166 transitions. [2022-01-11 06:00:02,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-11 06:00:02,163 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) Word has length 35 [2022-01-11 06:00:02,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:02,164 INFO L225 Difference]: With dead ends: 97 [2022-01-11 06:00:02,164 INFO L226 Difference]: Without dead ends: 56 [2022-01-11 06:00:02,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-01-11 06:00:02,165 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 49 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:02,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 206 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-11 06:00:02,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-11 06:00:02,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2022-01-11 06:00:02,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 34 states have internal predecessors, (35), 9 states have call successors, (9), 4 states have call predecessors, (9), 10 states have return successors, (25), 11 states have call predecessors, (25), 9 states have call successors, (25) [2022-01-11 06:00:02,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 69 transitions. [2022-01-11 06:00:02,172 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 69 transitions. Word has length 35 [2022-01-11 06:00:02,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:02,173 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 69 transitions. [2022-01-11 06:00:02,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-11 06:00:02,173 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 69 transitions. [2022-01-11 06:00:02,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-11 06:00:02,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:02,174 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:02,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-11 06:00:02,398 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 06:00:02,399 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:02,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:02,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1567662105, now seen corresponding path program 2 times [2022-01-11 06:00:02,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:02,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512291751] [2022-01-11 06:00:02,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:02,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:02,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:02,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:02,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:02,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:02,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:02,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:00:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:02,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-11 06:00:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:02,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-11 06:00:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-11 06:00:02,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:02,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512291751] [2022-01-11 06:00:02,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512291751] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:02,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733545457] [2022-01-11 06:00:02,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 06:00:02,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:02,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:02,707 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 06:00:02,749 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 06:00:02,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 06:00:02,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:00:02,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-11 06:00:02,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-11 06:00:03,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:00:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-11 06:00:06,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733545457] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:00:06,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:00:06,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 28 [2022-01-11 06:00:06,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533235254] [2022-01-11 06:00:06,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:00:06,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-11 06:00:06,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:06,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-11 06:00:06,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2022-01-11 06:00:06,308 INFO L87 Difference]: Start difference. First operand 50 states and 69 transitions. Second operand has 28 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 27 states have internal predecessors, (53), 12 states have call successors, (16), 1 states have call predecessors, (16), 9 states have return successors, (18), 9 states have call predecessors, (18), 12 states have call successors, (18) [2022-01-11 06:00:08,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:08,573 INFO L93 Difference]: Finished difference Result 112 states and 170 transitions. [2022-01-11 06:00:08,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-11 06:00:08,575 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 27 states have internal predecessors, (53), 12 states have call successors, (16), 1 states have call predecessors, (16), 9 states have return successors, (18), 9 states have call predecessors, (18), 12 states have call successors, (18) Word has length 46 [2022-01-11 06:00:08,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:08,577 INFO L225 Difference]: With dead ends: 112 [2022-01-11 06:00:08,577 INFO L226 Difference]: Without dead ends: 63 [2022-01-11 06:00:08,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2022-01-11 06:00:08,578 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:08,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 263 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-11 06:00:08,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-11 06:00:08,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2022-01-11 06:00:08,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (25), 14 states have call predecessors, (25), 10 states have call successors, (25) [2022-01-11 06:00:08,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2022-01-11 06:00:08,586 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 46 [2022-01-11 06:00:08,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:08,587 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2022-01-11 06:00:08,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 27 states have internal predecessors, (53), 12 states have call successors, (16), 1 states have call predecessors, (16), 9 states have return successors, (18), 9 states have call predecessors, (18), 12 states have call successors, (18) [2022-01-11 06:00:08,592 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2022-01-11 06:00:08,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-11 06:00:08,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:08,598 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:08,606 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 06:00:08,805 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 06:00:08,806 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:08,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:08,806 INFO L85 PathProgramCache]: Analyzing trace with hash -2052768956, now seen corresponding path program 1 times [2022-01-11 06:00:08,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:08,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39401719] [2022-01-11 06:00:08,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:08,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:08,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:08,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:08,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:08,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:08,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:08,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:08,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:08,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 06:00:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-11 06:00:09,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:09,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39401719] [2022-01-11 06:00:09,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39401719] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:09,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355780500] [2022-01-11 06:00:09,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:09,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:09,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:09,020 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 06:00:09,021 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 06:00:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:09,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 06:00:09,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-11 06:00:09,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:00:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-11 06:00:09,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355780500] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:00:09,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:00:09,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2022-01-11 06:00:09,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506125411] [2022-01-11 06:00:09,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:00:09,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-11 06:00:09,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:09,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-11 06:00:09,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-11 06:00:09,726 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand has 18 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 17 states have internal predecessors, (47), 10 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 06:00:10,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:10,153 INFO L93 Difference]: Finished difference Result 130 states and 203 transitions. [2022-01-11 06:00:10,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-11 06:00:10,154 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 17 states have internal predecessors, (47), 10 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) Word has length 48 [2022-01-11 06:00:10,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:10,155 INFO L225 Difference]: With dead ends: 130 [2022-01-11 06:00:10,155 INFO L226 Difference]: Without dead ends: 78 [2022-01-11 06:00:10,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-11 06:00:10,157 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 31 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:10,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 253 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-11 06:00:10,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-11 06:00:10,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2022-01-11 06:00:10,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 46 states have internal predecessors, (51), 13 states have call successors, (13), 6 states have call predecessors, (13), 14 states have return successors, (41), 20 states have call predecessors, (41), 13 states have call successors, (41) [2022-01-11 06:00:10,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 105 transitions. [2022-01-11 06:00:10,179 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 105 transitions. Word has length 48 [2022-01-11 06:00:10,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:10,179 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 105 transitions. [2022-01-11 06:00:10,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 17 states have internal predecessors, (47), 10 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 06:00:10,179 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 105 transitions. [2022-01-11 06:00:10,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-11 06:00:10,180 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:10,180 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:10,209 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 06:00:10,403 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 06:00:10,403 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:10,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:10,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1457684086, now seen corresponding path program 1 times [2022-01-11 06:00:10,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:10,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840325070] [2022-01-11 06:00:10,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:10,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:10,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:10,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:10,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:10,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:10,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:10,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:10,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:10,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:10,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:10,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:10,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-11 06:00:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:10,792 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-01-11 06:00:10,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:10,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840325070] [2022-01-11 06:00:10,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840325070] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:10,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069103713] [2022-01-11 06:00:10,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:10,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:10,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:10,793 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 06:00:10,794 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 06:00:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:10,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 06:00:10,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-11 06:00:11,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:00:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-11 06:00:11,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069103713] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:00:11,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:00:11,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7, 7] total 24 [2022-01-11 06:00:11,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138111246] [2022-01-11 06:00:11,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:00:11,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-11 06:00:11,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:11,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-11 06:00:11,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-01-11 06:00:11,387 INFO L87 Difference]: Start difference. First operand 73 states and 105 transitions. Second operand has 24 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 21 states have internal predecessors, (50), 10 states have call successors, (16), 1 states have call predecessors, (16), 9 states have return successors, (19), 12 states have call predecessors, (19), 10 states have call successors, (19) [2022-01-11 06:00:12,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:12,041 INFO L93 Difference]: Finished difference Result 194 states and 324 transitions. [2022-01-11 06:00:12,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-11 06:00:12,042 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 21 states have internal predecessors, (50), 10 states have call successors, (16), 1 states have call predecessors, (16), 9 states have return successors, (19), 12 states have call predecessors, (19), 10 states have call successors, (19) Word has length 60 [2022-01-11 06:00:12,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:12,044 INFO L225 Difference]: With dead ends: 194 [2022-01-11 06:00:12,044 INFO L226 Difference]: Without dead ends: 118 [2022-01-11 06:00:12,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2022-01-11 06:00:12,051 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 81 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:12,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 258 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-11 06:00:12,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-11 06:00:12,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 95. [2022-01-11 06:00:12,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 59 states have (on average 1.11864406779661) internal successors, (66), 60 states have internal predecessors, (66), 16 states have call successors, (16), 8 states have call predecessors, (16), 19 states have return successors, (54), 26 states have call predecessors, (54), 16 states have call successors, (54) [2022-01-11 06:00:12,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2022-01-11 06:00:12,064 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 60 [2022-01-11 06:00:12,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:12,065 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2022-01-11 06:00:12,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 21 states have internal predecessors, (50), 10 states have call successors, (16), 1 states have call predecessors, (16), 9 states have return successors, (19), 12 states have call predecessors, (19), 10 states have call successors, (19) [2022-01-11 06:00:12,065 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2022-01-11 06:00:12,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-11 06:00:12,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:12,066 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:12,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-11 06:00:12,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:12,280 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:12,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:12,280 INFO L85 PathProgramCache]: Analyzing trace with hash -678201443, now seen corresponding path program 1 times [2022-01-11 06:00:12,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:12,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57461547] [2022-01-11 06:00:12,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:12,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:12,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:12,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:12,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:12,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:12,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:12,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:12,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:12,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:12,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 06:00:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:12,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:12,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:12,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:12,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:12,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:12,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:12,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 06:00:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:12,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-11 06:00:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:12,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:12,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:12,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:12,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:12,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:12,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 06:00:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 97 proven. 152 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2022-01-11 06:00:12,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:12,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57461547] [2022-01-11 06:00:12,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57461547] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:12,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105948379] [2022-01-11 06:00:12,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:12,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:12,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:12,800 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:00:12,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-11 06:00:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:12,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-11 06:00:12,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 129 proven. 32 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2022-01-11 06:00:13,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:00:14,095 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 129 proven. 38 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2022-01-11 06:00:14,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105948379] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:00:14,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:00:14,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 11] total 31 [2022-01-11 06:00:14,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581930756] [2022-01-11 06:00:14,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:00:14,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-11 06:00:14,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:14,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-11 06:00:14,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-01-11 06:00:14,097 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 31 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 29 states have internal predecessors, (79), 17 states have call successors, (25), 1 states have call predecessors, (25), 14 states have return successors, (28), 17 states have call predecessors, (28), 17 states have call successors, (28) [2022-01-11 06:00:15,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:15,034 INFO L93 Difference]: Finished difference Result 245 states and 403 transitions. [2022-01-11 06:00:15,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-11 06:00:15,035 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 29 states have internal predecessors, (79), 17 states have call successors, (25), 1 states have call predecessors, (25), 14 states have return successors, (28), 17 states have call predecessors, (28), 17 states have call successors, (28) Word has length 136 [2022-01-11 06:00:15,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:15,038 INFO L225 Difference]: With dead ends: 245 [2022-01-11 06:00:15,038 INFO L226 Difference]: Without dead ends: 147 [2022-01-11 06:00:15,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 294 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=270, Invalid=1710, Unknown=0, NotChecked=0, Total=1980 [2022-01-11 06:00:15,040 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 59 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:15,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 370 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-11 06:00:15,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-01-11 06:00:15,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 127. [2022-01-11 06:00:15,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 78 states have (on average 1.1282051282051282) internal successors, (88), 80 states have internal predecessors, (88), 22 states have call successors, (22), 11 states have call predecessors, (22), 26 states have return successors, (74), 35 states have call predecessors, (74), 22 states have call successors, (74) [2022-01-11 06:00:15,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 184 transitions. [2022-01-11 06:00:15,083 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 184 transitions. Word has length 136 [2022-01-11 06:00:15,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:15,083 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 184 transitions. [2022-01-11 06:00:15,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 29 states have internal predecessors, (79), 17 states have call successors, (25), 1 states have call predecessors, (25), 14 states have return successors, (28), 17 states have call predecessors, (28), 17 states have call successors, (28) [2022-01-11 06:00:15,084 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 184 transitions. [2022-01-11 06:00:15,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-11 06:00:15,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:15,085 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:15,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-11 06:00:15,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-11 06:00:15,304 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:15,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:15,304 INFO L85 PathProgramCache]: Analyzing trace with hash 449086984, now seen corresponding path program 2 times [2022-01-11 06:00:15,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:15,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180095761] [2022-01-11 06:00:15,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:15,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:15,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:15,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:15,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:15,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:15,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:16,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:16,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:16,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:16,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 06:00:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:16,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:16,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:16,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-11 06:00:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:16,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:16,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:16,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:16,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 85 proven. 87 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-01-11 06:00:16,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:16,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180095761] [2022-01-11 06:00:16,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180095761] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:16,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360181148] [2022-01-11 06:00:16,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 06:00:16,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:16,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:16,598 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:00:16,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-11 06:00:17,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 06:00:17,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:00:17,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-11 06:00:17,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:18,002 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 101 proven. 9 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-01-11 06:00:18,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:00:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 92 proven. 6 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-01-11 06:00:18,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360181148] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:00:18,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:00:18,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 13, 9] total 41 [2022-01-11 06:00:18,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549382007] [2022-01-11 06:00:18,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:00:18,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-11 06:00:18,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:18,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-11 06:00:18,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-01-11 06:00:18,937 INFO L87 Difference]: Start difference. First operand 127 states and 184 transitions. Second operand has 41 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 34 states have internal predecessors, (79), 20 states have call successors, (24), 1 states have call predecessors, (24), 14 states have return successors, (27), 15 states have call predecessors, (27), 20 states have call successors, (27) [2022-01-11 06:00:20,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:20,622 INFO L93 Difference]: Finished difference Result 254 states and 422 transitions. [2022-01-11 06:00:20,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-11 06:00:20,623 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 34 states have internal predecessors, (79), 20 states have call successors, (24), 1 states have call predecessors, (24), 14 states have return successors, (27), 15 states have call predecessors, (27), 20 states have call successors, (27) Word has length 98 [2022-01-11 06:00:20,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:20,625 INFO L225 Difference]: With dead ends: 254 [2022-01-11 06:00:20,625 INFO L226 Difference]: Without dead ends: 128 [2022-01-11 06:00:20,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 201 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=473, Invalid=3433, Unknown=0, NotChecked=0, Total=3906 [2022-01-11 06:00:20,649 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 112 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:20,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 562 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-11 06:00:20,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-11 06:00:20,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 112. [2022-01-11 06:00:20,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 71 states have internal predecessors, (75), 19 states have call successors, (19), 10 states have call predecessors, (19), 22 states have return successors, (67), 30 states have call predecessors, (67), 19 states have call successors, (67) [2022-01-11 06:00:20,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 161 transitions. [2022-01-11 06:00:20,679 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 161 transitions. Word has length 98 [2022-01-11 06:00:20,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:20,681 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 161 transitions. [2022-01-11 06:00:20,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 34 states have internal predecessors, (79), 20 states have call successors, (24), 1 states have call predecessors, (24), 14 states have return successors, (27), 15 states have call predecessors, (27), 20 states have call successors, (27) [2022-01-11 06:00:20,681 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 161 transitions. [2022-01-11 06:00:20,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-11 06:00:20,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:20,683 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:20,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-11 06:00:20,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:20,891 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:20,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:20,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1981903082, now seen corresponding path program 3 times [2022-01-11 06:00:20,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:20,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886090100] [2022-01-11 06:00:20,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:20,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:20,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:21,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:21,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:21,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:21,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:21,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:21,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:21,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:21,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 06:00:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:21,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:21,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:21,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-11 06:00:21,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:21,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:21,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:21,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:21,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:21,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 12 proven. 92 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-01-11 06:00:21,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:21,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886090100] [2022-01-11 06:00:21,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886090100] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:21,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219156538] [2022-01-11 06:00:21,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 06:00:21,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:21,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:21,592 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:00:21,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-11 06:00:21,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-11 06:00:21,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:00:21,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 73 conjunts are in the unsatisfiable core [2022-01-11 06:00:21,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-01-11 06:00:23,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:00:38,934 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-01-11 06:00:38,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219156538] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:00:38,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:00:38,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22, 22] total 53 [2022-01-11 06:00:38,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16088756] [2022-01-11 06:00:38,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:00:38,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-11 06:00:38,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:38,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-11 06:00:38,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2602, Unknown=0, NotChecked=0, Total=2756 [2022-01-11 06:00:38,937 INFO L87 Difference]: Start difference. First operand 112 states and 161 transitions. Second operand has 53 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 26 states have internal predecessors, (64), 10 states have call successors, (12), 1 states have call predecessors, (12), 23 states have return successors, (32), 27 states have call predecessors, (32), 10 states have call successors, (32) [2022-01-11 06:00:39,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:39,468 INFO L93 Difference]: Finished difference Result 133 states and 198 transitions. [2022-01-11 06:00:39,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-11 06:00:39,468 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 26 states have internal predecessors, (64), 10 states have call successors, (12), 1 states have call predecessors, (12), 23 states have return successors, (32), 27 states have call predecessors, (32), 10 states have call successors, (32) Word has length 99 [2022-01-11 06:00:39,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:39,470 INFO L225 Difference]: With dead ends: 133 [2022-01-11 06:00:39,470 INFO L226 Difference]: Without dead ends: 129 [2022-01-11 06:00:39,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 26 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=154, Invalid=2602, Unknown=0, NotChecked=0, Total=2756 [2022-01-11 06:00:39,471 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 0 mSDsluCounter, 1595 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:39,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1649 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 354 Invalid, 0 Unknown, 44 Unchecked, 0.5s Time] [2022-01-11 06:00:39,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-11 06:00:39,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2022-01-11 06:00:39,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 77 states have internal predecessors, (81), 22 states have call successors, (22), 10 states have call predecessors, (22), 25 states have return successors, (83), 36 states have call predecessors, (83), 22 states have call successors, (83) [2022-01-11 06:00:39,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 186 transitions. [2022-01-11 06:00:39,496 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 186 transitions. Word has length 99 [2022-01-11 06:00:39,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:39,496 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 186 transitions. [2022-01-11 06:00:39,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 26 states have internal predecessors, (64), 10 states have call successors, (12), 1 states have call predecessors, (12), 23 states have return successors, (32), 27 states have call predecessors, (32), 10 states have call successors, (32) [2022-01-11 06:00:39,497 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 186 transitions. [2022-01-11 06:00:39,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-11 06:00:39,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:39,501 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:39,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-11 06:00:39,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-11 06:00:39,707 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:39,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:39,708 INFO L85 PathProgramCache]: Analyzing trace with hash 109842369, now seen corresponding path program 4 times [2022-01-11 06:00:39,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:39,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382025190] [2022-01-11 06:00:39,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:39,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:39,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:39,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:40,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:40,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:40,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:40,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:40,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:40,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:40,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:40,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 06:00:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:40,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:40,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:40,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-11 06:00:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:40,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:40,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:40,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:40,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:40,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:41,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:41,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:41,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 06:00:41,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:41,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-11 06:00:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:41,032 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 140 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-01-11 06:00:41,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:41,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382025190] [2022-01-11 06:00:41,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382025190] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:41,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197789674] [2022-01-11 06:00:41,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 06:00:41,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:41,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:41,034 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:00:41,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-11 06:00:41,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 06:00:41,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:00:41,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-11 06:00:41,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:51,359 WARN L228 SmtUtils]: Spent 8.69s on a formula simplification. DAG size of input: 4197 DAG size of output: 1869 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-01-11 06:01:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 149 proven. 34 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-01-11 06:01:05,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:01:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 149 proven. 15 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2022-01-11 06:01:06,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197789674] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:01:06,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:01:06,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 11, 10] total 39 [2022-01-11 06:01:06,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464593527] [2022-01-11 06:01:06,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:01:06,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-11 06:01:06,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:01:06,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-11 06:01:06,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1312, Unknown=0, NotChecked=0, Total=1482 [2022-01-11 06:01:06,921 INFO L87 Difference]: Start difference. First operand 124 states and 186 transitions. Second operand has 39 states, 27 states have (on average 2.962962962962963) internal successors, (80), 32 states have internal predecessors, (80), 22 states have call successors, (30), 1 states have call predecessors, (30), 14 states have return successors, (35), 23 states have call predecessors, (35), 22 states have call successors, (35) [2022-01-11 06:01:08,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:01:08,936 INFO L93 Difference]: Finished difference Result 256 states and 457 transitions. [2022-01-11 06:01:08,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-11 06:01:08,937 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 27 states have (on average 2.962962962962963) internal successors, (80), 32 states have internal predecessors, (80), 22 states have call successors, (30), 1 states have call predecessors, (30), 14 states have return successors, (35), 23 states have call predecessors, (35), 22 states have call successors, (35) Word has length 124 [2022-01-11 06:01:08,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:01:08,938 INFO L225 Difference]: With dead ends: 256 [2022-01-11 06:01:08,938 INFO L226 Difference]: Without dead ends: 139 [2022-01-11 06:01:08,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 262 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=448, Invalid=2744, Unknown=0, NotChecked=0, Total=3192 [2022-01-11 06:01:08,940 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 130 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-11 06:01:08,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 709 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1158 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-11 06:01:08,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-11 06:01:08,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 116. [2022-01-11 06:01:08,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 74 states have (on average 1.054054054054054) internal successors, (78), 73 states have internal predecessors, (78), 22 states have call successors, (22), 13 states have call predecessors, (22), 19 states have return successors, (55), 29 states have call predecessors, (55), 22 states have call successors, (55) [2022-01-11 06:01:08,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 155 transitions. [2022-01-11 06:01:08,950 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 155 transitions. Word has length 124 [2022-01-11 06:01:08,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:01:08,950 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 155 transitions. [2022-01-11 06:01:08,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 27 states have (on average 2.962962962962963) internal successors, (80), 32 states have internal predecessors, (80), 22 states have call successors, (30), 1 states have call predecessors, (30), 14 states have return successors, (35), 23 states have call predecessors, (35), 22 states have call successors, (35) [2022-01-11 06:01:08,951 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 155 transitions. [2022-01-11 06:01:08,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-01-11 06:01:08,952 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:08,952 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 14, 13, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:08,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-11 06:01:09,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-11 06:01:09,158 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:09,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:09,159 INFO L85 PathProgramCache]: Analyzing trace with hash -927394469, now seen corresponding path program 5 times [2022-01-11 06:01:09,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:09,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30513811] [2022-01-11 06:01:09,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:09,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:09,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2