/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_LAZY.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 18:21:48,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 18:21:48,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 18:21:48,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 18:21:48,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 18:21:48,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 18:21:48,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 18:21:48,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 18:21:48,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 18:21:48,183 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 18:21:48,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 18:21:48,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 18:21:48,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 18:21:48,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 18:21:48,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 18:21:48,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 18:21:48,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 18:21:48,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 18:21:48,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 18:21:48,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 18:21:48,191 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 18:21:48,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 18:21:48,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 18:21:48,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 18:21:48,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 18:21:48,209 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 18:21:48,209 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 18:21:48,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 18:21:48,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 18:21:48,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 18:21:48,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 18:21:48,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 18:21:48,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 18:21:48,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 18:21:48,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 18:21:48,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 18:21:48,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 18:21:48,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 18:21:48,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 18:21:48,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 18:21:48,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 18:21:48,220 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 18:21:48,243 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 18:21:48,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 18:21:48,256 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 18:21:48,256 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 18:21:48,257 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 18:21:48,257 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 18:21:48,257 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 18:21:48,257 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 18:21:48,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 18:21:48,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 18:21:48,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 18:21:48,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 18:21:48,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 18:21:48,259 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 18:21:48,259 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 18:21:48,259 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 18:21:48,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 18:21:48,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 18:21:48,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 18:21:48,259 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 18:21:48,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 18:21:48,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:21:48,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 18:21:48,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 18:21:48,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 18:21:48,260 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 18:21:48,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 18:21:48,260 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 18:21:48,260 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 18:21:48,260 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 18:21:48,260 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 18:21:48,260 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 18:21:48,262 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 18:21:48,262 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 18:21:48,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 18:21:48,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 18:21:48,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 18:21:48,428 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 18:21:48,429 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 18:21:48,429 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c [2022-01-10 18:21:48,461 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e92a83b89/b707c801c2594f4fa24305a4a415f263/FLAG15a620c48 [2022-01-10 18:21:48,826 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 18:21:48,826 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c [2022-01-10 18:21:48,839 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e92a83b89/b707c801c2594f4fa24305a4a415f263/FLAG15a620c48 [2022-01-10 18:21:49,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e92a83b89/b707c801c2594f4fa24305a4a415f263 [2022-01-10 18:21:49,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 18:21:49,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 18:21:49,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 18:21:49,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 18:21:49,255 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 18:21:49,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:21:49" (1/1) ... [2022-01-10 18:21:49,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e1f7520 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:49, skipping insertion in model container [2022-01-10 18:21:49,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:21:49" (1/1) ... [2022-01-10 18:21:49,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 18:21:49,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 18:21:49,381 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_10-2.c[949,962] [2022-01-10 18:21:49,398 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:21:49,406 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 18:21:49,415 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_10-2.c[949,962] [2022-01-10 18:21:49,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:21:49,426 INFO L208 MainTranslator]: Completed translation [2022-01-10 18:21:49,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:49 WrapperNode [2022-01-10 18:21:49,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 18:21:49,427 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 18:21:49,427 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 18:21:49,427 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 18:21:49,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:49" (1/1) ... [2022-01-10 18:21:49,436 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:49" (1/1) ... [2022-01-10 18:21:49,445 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-10 18:21:49,445 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 18:21:49,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 18:21:49,445 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 18:21:49,445 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 18:21:49,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:49" (1/1) ... [2022-01-10 18:21:49,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:49" (1/1) ... [2022-01-10 18:21:49,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:49" (1/1) ... [2022-01-10 18:21:49,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:49" (1/1) ... [2022-01-10 18:21:49,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:49" (1/1) ... [2022-01-10 18:21:49,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:49" (1/1) ... [2022-01-10 18:21:49,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:49" (1/1) ... [2022-01-10 18:21:49,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 18:21:49,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 18:21:49,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 18:21:49,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 18:21:49,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:49" (1/1) ... [2022-01-10 18:21:49,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:21:49,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:21:49,498 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 18:21:49,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 18:21:49,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 18:21:49,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 18:21:49,557 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2022-01-10 18:21:49,557 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2022-01-10 18:21:49,557 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2022-01-10 18:21:49,558 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2022-01-10 18:21:49,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 18:21:49,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 18:21:49,620 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 18:21:49,622 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 18:21:49,714 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 18:21:49,718 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 18:21:49,719 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 18:21:49,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:21:49 BoogieIcfgContainer [2022-01-10 18:21:49,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 18:21:49,720 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 18:21:49,721 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 18:21:49,721 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 18:21:49,723 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:21:49" (1/1) ... [2022-01-10 18:21:49,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:21:49 BasicIcfg [2022-01-10 18:21:49,768 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 18:21:49,769 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 18:21:49,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 18:21:49,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 18:21:49,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:21:49" (1/4) ... [2022-01-10 18:21:49,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6397cfbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:21:49, skipping insertion in model container [2022-01-10 18:21:49,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:49" (2/4) ... [2022-01-10 18:21:49,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6397cfbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:21:49, skipping insertion in model container [2022-01-10 18:21:49,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:21:49" (3/4) ... [2022-01-10 18:21:49,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6397cfbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:21:49, skipping insertion in model container [2022-01-10 18:21:49,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:21:49" (4/4) ... [2022-01-10 18:21:49,773 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_10-2.cTransformedIcfg [2022-01-10 18:21:49,777 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 18:21:49,777 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 18:21:49,807 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 18:21:49,812 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 18:21:49,820 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 18:21:49,831 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) [2022-01-10 18:21:49,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 18:21:49,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:21:49,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:21:49,834 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:21:49,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:21:49,837 INFO L85 PathProgramCache]: Analyzing trace with hash 409070419, now seen corresponding path program 1 times [2022-01-10 18:21:49,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:21:49,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013509101] [2022-01-10 18:21:49,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:21:49,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:21:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:49,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:21:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:49,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:21:49,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:21:49,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013509101] [2022-01-10 18:21:49,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013509101] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:21:49,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:21:49,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:21:49,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981907781] [2022-01-10 18:21:49,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:21:49,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:21:49,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:21:49,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:21:49,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:21:49,998 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, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 18:21:50,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:21:50,024 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-01-10 18:21:50,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:21:50,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-10 18:21:50,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:21:50,030 INFO L225 Difference]: With dead ends: 41 [2022-01-10 18:21:50,030 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 18:21:50,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:21:50,034 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:21:50,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 118 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:21:50,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 18:21:50,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-10 18:21:50,056 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) [2022-01-10 18:21:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-10 18:21:50,057 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 10 [2022-01-10 18:21:50,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:21:50,057 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-10 18:21:50,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 18:21:50,058 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-10 18:21:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 18:21:50,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:21:50,059 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:21:50,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 18:21:50,059 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:21:50,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:21:50,060 INFO L85 PathProgramCache]: Analyzing trace with hash 697486659, now seen corresponding path program 1 times [2022-01-10 18:21:50,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:21:50,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922021375] [2022-01-10 18:21:50,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:21:50,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:21:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:50,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:21:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:21:50,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:21:50,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922021375] [2022-01-10 18:21:50,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922021375] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:21:50,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:21:50,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:21:50,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388669085] [2022-01-10 18:21:50,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:21:50,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:21:50,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:21:50,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:21:50,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:21:50,133 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) [2022-01-10 18:21:50,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:21:50,177 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-01-10 18:21:50,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:21:50,178 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 [2022-01-10 18:21:50,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:21:50,178 INFO L225 Difference]: With dead ends: 31 [2022-01-10 18:21:50,179 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 18:21:50,179 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 [2022-01-10 18:21:50,180 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 [2022-01-10 18:21:50,180 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] [2022-01-10 18:21:50,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 18:21:50,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-01-10 18:21:50,185 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) [2022-01-10 18:21:50,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-10 18:21:50,186 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 11 [2022-01-10 18:21:50,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:21:50,186 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-10 18:21:50,186 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) [2022-01-10 18:21:50,186 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-10 18:21:50,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 18:21:50,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:21:50,187 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:21:50,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 18:21:50,187 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:21:50,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:21:50,188 INFO L85 PathProgramCache]: Analyzing trace with hash 63510830, now seen corresponding path program 1 times [2022-01-10 18:21:50,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:21:50,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183737917] [2022-01-10 18:21:50,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:21:50,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:21:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:50,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:21:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:50,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:50,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:50,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:21:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:21:50,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:21:50,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183737917] [2022-01-10 18:21:50,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183737917] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:21:50,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136320281] [2022-01-10 18:21:50,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:21:50,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:21:50,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:21:50,414 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:21:50,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 18:21:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:50,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 18:21:50,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:21:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 18:21:50,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 18:21:50,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136320281] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:21:50,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 18:21:50,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-01-10 18:21:50,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317347681] [2022-01-10 18:21:50,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:21:50,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 18:21:50,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:21:50,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 18:21:50,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-01-10 18:21:50,698 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 18:21:50,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:21:50,758 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-01-10 18:21:50,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 18:21:50,759 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-01-10 18:21:50,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:21:50,759 INFO L225 Difference]: With dead ends: 38 [2022-01-10 18:21:50,759 INFO L226 Difference]: Without dead ends: 34 [2022-01-10 18:21:50,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-01-10 18:21:50,761 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:21:50,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 184 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:21:50,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-10 18:21:50,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-01-10 18:21:50,766 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) [2022-01-10 18:21:50,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-01-10 18:21:50,772 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 22 [2022-01-10 18:21:50,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:21:50,772 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-01-10 18:21:50,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 18:21:50,773 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-01-10 18:21:50,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 18:21:50,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:21:50,776 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] [2022-01-10 18:21:50,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 18:21:50,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:21:50,993 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:21:50,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:21:50,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1726490069, now seen corresponding path program 1 times [2022-01-10 18:21:50,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:21:50,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225708496] [2022-01-10 18:21:50,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:21:50,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:21:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:51,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:21:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:51,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:51,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:21:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:21:51,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:21:51,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225708496] [2022-01-10 18:21:51,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225708496] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:21:51,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:21:51,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 18:21:51,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899831425] [2022-01-10 18:21:51,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:21:51,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 18:21:51,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:21:51,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 18:21:51,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 18:21:51,156 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 18:21:51,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:21:51,246 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2022-01-10 18:21:51,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 18:21:51,246 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-01-10 18:21:51,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:21:51,252 INFO L225 Difference]: With dead ends: 41 [2022-01-10 18:21:51,252 INFO L226 Difference]: Without dead ends: 37 [2022-01-10 18:21:51,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-10 18:21:51,260 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:21:51,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 90 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:21:51,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-10 18:21:51,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2022-01-10 18:21:51,267 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, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2022-01-10 18:21:51,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 47 transitions. [2022-01-10 18:21:51,268 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 47 transitions. Word has length 23 [2022-01-10 18:21:51,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:21:51,268 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 47 transitions. [2022-01-10 18:21:51,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 18:21:51,268 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 47 transitions. [2022-01-10 18:21:51,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 18:21:51,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:21:51,269 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] [2022-01-10 18:21:51,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 18:21:51,270 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:21:51,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:21:51,270 INFO L85 PathProgramCache]: Analyzing trace with hash -312577904, now seen corresponding path program 1 times [2022-01-10 18:21:51,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:21:51,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098934920] [2022-01-10 18:21:51,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:21:51,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:21:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:51,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:21:51,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:51,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:51,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:21:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:51,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:51,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:51,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:21:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:51,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 18:21:51,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:21:51,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098934920] [2022-01-10 18:21:51,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098934920] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:21:51,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805605232] [2022-01-10 18:21:51,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:21:51,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:21:51,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:21:51,684 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:21:51,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 18:21:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:51,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 18:21:51,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:21:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 18:21:51,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 18:21:51,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805605232] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:21:51,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 18:21:51,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 21 [2022-01-10 18:21:51,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331096228] [2022-01-10 18:21:51,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:21:51,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 18:21:51,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:21:51,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 18:21:51,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-01-10 18:21:51,940 INFO L87 Difference]: Start difference. First operand 32 states and 47 transitions. Second operand has 10 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 18:21:51,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:21:51,965 INFO L93 Difference]: Finished difference Result 50 states and 78 transitions. [2022-01-10 18:21:51,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 18:21:51,965 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2022-01-10 18:21:51,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:21:51,966 INFO L225 Difference]: With dead ends: 50 [2022-01-10 18:21:51,966 INFO L226 Difference]: Without dead ends: 46 [2022-01-10 18:21:51,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-01-10 18:21:51,967 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:21:51,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 192 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:21:51,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-10 18:21:51,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2022-01-10 18:21:51,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 8 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (22), 11 states have call predecessors, (22), 8 states have call successors, (22) [2022-01-10 18:21:51,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 56 transitions. [2022-01-10 18:21:51,987 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 56 transitions. Word has length 34 [2022-01-10 18:21:51,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:21:51,987 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 56 transitions. [2022-01-10 18:21:51,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 18:21:51,987 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 56 transitions. [2022-01-10 18:21:51,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 18:21:51,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:21:51,989 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] [2022-01-10 18:21:52,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 18:21:52,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:21:52,214 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:21:52,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:21:52,215 INFO L85 PathProgramCache]: Analyzing trace with hash 176289166, now seen corresponding path program 1 times [2022-01-10 18:21:52,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:21:52,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535184028] [2022-01-10 18:21:52,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:21:52,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:21:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:52,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:21:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:52,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:52,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:21:52,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:52,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:52,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:21:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:52,469 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 18:21:52,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:21:52,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535184028] [2022-01-10 18:21:52,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535184028] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:21:52,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021298434] [2022-01-10 18:21:52,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:21:52,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:21:52,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:21:52,484 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) [2022-01-10 18:21:52,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 18:21:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:52,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 18:21:52,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:21:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 18:21:52,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:21:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 18:21:53,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021298434] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:21:53,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:21:53,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 9] total 22 [2022-01-10 18:21:53,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934440403] [2022-01-10 18:21:53,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:21:53,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 18:21:53,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:21:53,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 18:21:53,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-01-10 18:21:53,160 INFO L87 Difference]: Start difference. First operand 37 states and 56 transitions. Second operand has 22 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 21 states have internal predecessors, (50), 9 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2022-01-10 18:21:53,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:21:53,674 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2022-01-10 18:21:53,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 18:21:53,680 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 21 states have internal predecessors, (50), 9 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) Word has length 35 [2022-01-10 18:21:53,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:21:53,681 INFO L225 Difference]: With dead ends: 99 [2022-01-10 18:21:53,681 INFO L226 Difference]: Without dead ends: 65 [2022-01-10 18:21:53,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2022-01-10 18:21:53,683 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 18:21:53,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 312 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 18:21:53,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-10 18:21:53,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2022-01-10 18:21:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 33 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 11 states have return successors, (41), 15 states have call predecessors, (41), 9 states have call successors, (41) [2022-01-10 18:21:53,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 84 transitions. [2022-01-10 18:21:53,692 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 84 transitions. Word has length 35 [2022-01-10 18:21:53,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:21:53,692 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 84 transitions. [2022-01-10 18:21:53,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 21 states have internal predecessors, (50), 9 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2022-01-10 18:21:53,692 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 84 transitions. [2022-01-10 18:21:53,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 18:21:53,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:21:53,694 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] [2022-01-10 18:21:53,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 18:21:53,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:21:53,895 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:21:53,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:21:53,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1759393138, now seen corresponding path program 2 times [2022-01-10 18:21:53,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:21:53,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392955533] [2022-01-10 18:21:53,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:21:53,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:21:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:53,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:21:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:53,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:54,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:54,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:54,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:21:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:54,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:21:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 18:21:54,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:21:54,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392955533] [2022-01-10 18:21:54,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392955533] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:21:54,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102891936] [2022-01-10 18:21:54,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 18:21:54,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:21:54,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:21:54,097 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) [2022-01-10 18:21:54,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 18:21:54,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 18:21:54,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:21:54,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 18:21:54,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:21:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 18:21:54,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:21:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 18:21:54,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102891936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:21:54,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:21:54,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 19 [2022-01-10 18:21:54,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313223261] [2022-01-10 18:21:54,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:21:54,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 18:21:54,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:21:54,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 18:21:54,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-10 18:21:54,921 INFO L87 Difference]: Start difference. First operand 51 states and 84 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) [2022-01-10 18:21:55,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:21:55,422 INFO L93 Difference]: Finished difference Result 141 states and 270 transitions. [2022-01-10 18:21:55,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 18:21:55,424 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 [2022-01-10 18:21:55,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:21:55,425 INFO L225 Difference]: With dead ends: 141 [2022-01-10 18:21:55,425 INFO L226 Difference]: Without dead ends: 74 [2022-01-10 18:21:55,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-01-10 18:21:55,427 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 18:21:55,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 231 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 18:21:55,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-10 18:21:55,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2022-01-10 18:21:55,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 42 states have internal predecessors, (44), 11 states have call successors, (11), 4 states have call predecessors, (11), 14 states have return successors, (48), 18 states have call predecessors, (48), 11 states have call successors, (48) [2022-01-10 18:21:55,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 103 transitions. [2022-01-10 18:21:55,442 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 103 transitions. Word has length 35 [2022-01-10 18:21:55,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:21:55,442 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 103 transitions. [2022-01-10 18:21:55,442 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) [2022-01-10 18:21:55,442 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 103 transitions. [2022-01-10 18:21:55,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 18:21:55,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:21:55,447 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:21:55,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-10 18:21:55,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:21:55,662 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:21:55,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:21:55,662 INFO L85 PathProgramCache]: Analyzing trace with hash 94684969, now seen corresponding path program 1 times [2022-01-10 18:21:55,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:21:55,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053216395] [2022-01-10 18:21:55,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:21:55,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:21:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:55,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:21:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:55,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:55,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:55,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:55,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:55,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:21:55,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:55,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 18:21:55,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:55,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-10 18:21:55,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 18:21:55,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:21:55,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053216395] [2022-01-10 18:21:55,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053216395] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:21:55,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825313200] [2022-01-10 18:21:55,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:21:55,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:21:55,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:21:55,847 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) [2022-01-10 18:21:55,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 18:21:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:55,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 18:21:55,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:21:56,095 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 18:21:56,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:21:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 18:21:56,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825313200] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:21:56,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:21:56,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2022-01-10 18:21:56,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062884052] [2022-01-10 18:21:56,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:21:56,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 18:21:56,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:21:56,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 18:21:56,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-10 18:21:56,540 INFO L87 Difference]: Start difference. First operand 65 states and 103 transitions. Second operand has 18 states, 15 states have (on average 3.0) internal successors, (45), 17 states have internal predecessors, (45), 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) [2022-01-10 18:21:56,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:21:56,837 INFO L93 Difference]: Finished difference Result 154 states and 294 transitions. [2022-01-10 18:21:56,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 18:21:56,837 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.0) internal successors, (45), 17 states have internal predecessors, (45), 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 47 [2022-01-10 18:21:56,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:21:56,839 INFO L225 Difference]: With dead ends: 154 [2022-01-10 18:21:56,839 INFO L226 Difference]: Without dead ends: 89 [2022-01-10 18:21:56,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-10 18:21:56,840 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 18:21:56,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 237 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 18:21:56,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-10 18:21:56,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2022-01-10 18:21:56,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 51 states have internal predecessors, (55), 14 states have call successors, (14), 5 states have call predecessors, (14), 17 states have return successors, (66), 23 states have call predecessors, (66), 14 states have call successors, (66) [2022-01-10 18:21:56,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 135 transitions. [2022-01-10 18:21:56,851 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 135 transitions. Word has length 47 [2022-01-10 18:21:56,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:21:56,852 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 135 transitions. [2022-01-10 18:21:56,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.0) internal successors, (45), 17 states have internal predecessors, (45), 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) [2022-01-10 18:21:56,852 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 135 transitions. [2022-01-10 18:21:56,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 18:21:56,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:21:56,853 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:21:56,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-10 18:21:57,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:21:57,074 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:21:57,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:21:57,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1359840148, now seen corresponding path program 1 times [2022-01-10 18:21:57,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:21:57,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496021426] [2022-01-10 18:21:57,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:21:57,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:21:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:57,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:21:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:57,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:57,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:57,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:57,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:21:57,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:57,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:21:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:57,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-10 18:21:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 18:21:57,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:21:57,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496021426] [2022-01-10 18:21:57,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496021426] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:21:57,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979608614] [2022-01-10 18:21:57,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:21:57,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:21:57,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:21:57,400 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) [2022-01-10 18:21:57,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 18:21:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:57,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-10 18:21:57,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:21:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-10 18:21:57,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:22:00,192 WARN L838 $PredicateComparison]: unable to prove that (forall ((|aux_div_v_fibo1_fibo1_#t~ret4Int_BEFORE_CALL_5_68| Int) (|aux_mod_aux_mod_v_fibo1_fibo1_#t~ret4Int_BEFORE_CALL_5_68_163| Int) (|aux_div_aux_mod_v_fibo1_fibo1_#t~ret4Int_BEFORE_CALL_5_68_163| Int)) (or (< |aux_mod_aux_mod_v_fibo1_fibo1_#t~ret4Int_BEFORE_CALL_5_68_163| 0) (<= (+ 2 |aux_div_v_fibo1_fibo1_#t~ret4Int_BEFORE_CALL_5_68|) |aux_div_aux_mod_v_fibo1_fibo1_#t~ret4Int_BEFORE_CALL_5_68_163|) (< (* |aux_div_aux_mod_v_fibo1_fibo1_#t~ret4Int_BEFORE_CALL_5_68_163| 4294967296) (+ |aux_mod_aux_mod_v_fibo1_fibo1_#t~ret4Int_BEFORE_CALL_5_68_163| (* 4294967296 |aux_div_v_fibo1_fibo1_#t~ret4Int_BEFORE_CALL_5_68|) 2)) (not (= (mod (+ |c_fibo2_fibo2_#resInt| 54 (* |aux_mod_aux_mod_v_fibo1_fibo1_#t~ret4Int_BEFORE_CALL_5_68_163| 4294967295)) 4294967296) 55)))) is different from false