/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 06:00:40,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 06:00:40,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 06:00:40,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 06:00:40,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 06:00:40,609 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 06:00:40,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 06:00:40,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 06:00:40,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 06:00:40,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 06:00:40,622 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 06:00:40,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 06:00:40,622 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 06:00:40,624 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 06:00:40,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 06:00:40,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 06:00:40,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 06:00:40,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 06:00:40,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 06:00:40,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 06:00:40,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 06:00:40,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 06:00:40,640 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 06:00:40,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 06:00:40,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 06:00:40,643 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 06:00:40,643 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 06:00:40,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 06:00:40,645 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 06:00:40,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 06:00:40,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 06:00:40,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 06:00:40,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 06:00:40,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 06:00:40,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 06:00:40,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 06:00:40,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 06:00:40,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 06:00:40,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 06:00:40,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 06:00:40,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 06:00:40,652 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 06:00:40,685 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 06:00:40,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 06:00:40,685 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 06:00:40,685 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 06:00:40,687 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 06:00:40,687 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 06:00:40,687 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 06:00:40,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 06:00:40,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 06:00:40,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 06:00:40,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 06:00:40,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 06:00:40,689 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 06:00:40,689 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 06:00:40,689 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 06:00:40,689 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 06:00:40,689 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 06:00:40,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 06:00:40,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 06:00:40,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 06:00:40,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 06:00:40,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 06:00:40,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 06:00:40,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 06:00:40,691 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 06:00:40,691 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 06:00:40,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 06:00:40,692 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 06:00:40,692 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 06:00:40,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 06:00:40,692 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 06:00:40,692 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 06:00:40,693 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 06:00:40,693 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 06:00:40,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 06:00:40,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 06:00:40,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 06:00:40,934 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 06:00:40,934 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 06:00:40,935 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2022-01-11 06:00:40,996 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3efe70751/3c8a3436003f4baaa46d267f7ef13173/FLAGb03032496 [2022-01-11 06:00:41,400 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 06:00:41,401 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2022-01-11 06:00:41,410 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3efe70751/3c8a3436003f4baaa46d267f7ef13173/FLAGb03032496 [2022-01-11 06:00:41,800 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3efe70751/3c8a3436003f4baaa46d267f7ef13173 [2022-01-11 06:00:41,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 06:00:41,805 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 06:00:41,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 06:00:41,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 06:00:41,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 06:00:41,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 06:00:41" (1/1) ... [2022-01-11 06:00:41,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cb4395e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:41, skipping insertion in model container [2022-01-11 06:00:41,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 06:00:41" (1/1) ... [2022-01-11 06:00:41,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 06:00:41,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 06:00:41,966 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_5-1.c[740,753] [2022-01-11 06:00:41,970 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 06:00:41,987 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 06:00:42,001 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_5-1.c[740,753] [2022-01-11 06:00:42,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 06:00:42,013 INFO L208 MainTranslator]: Completed translation [2022-01-11 06:00:42,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:42 WrapperNode [2022-01-11 06:00:42,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 06:00:42,015 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 06:00:42,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 06:00:42,015 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 06:00:42,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:42" (1/1) ... [2022-01-11 06:00:42,026 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:42" (1/1) ... [2022-01-11 06:00:42,037 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-11 06:00:42,037 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 06:00:42,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 06:00:42,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 06:00:42,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 06:00:42,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:42" (1/1) ... [2022-01-11 06:00:42,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:42" (1/1) ... [2022-01-11 06:00:42,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:42" (1/1) ... [2022-01-11 06:00:42,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:42" (1/1) ... [2022-01-11 06:00:42,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:42" (1/1) ... [2022-01-11 06:00:42,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:42" (1/1) ... [2022-01-11 06:00:42,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:42" (1/1) ... [2022-01-11 06:00:42,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 06:00:42,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 06:00:42,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 06:00:42,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 06:00:42,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:42" (1/1) ... [2022-01-11 06:00:42,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 06:00:42,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:42,088 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-11 06:00:42,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-11 06:00:42,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 06:00:42,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 06:00:42,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 06:00:42,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 06:00:42,133 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-01-11 06:00:42,133 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-01-11 06:00:42,178 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 06:00:42,179 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 06:00:42,291 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 06:00:42,296 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 06:00:42,296 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-11 06:00:42,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 06:00:42 BoogieIcfgContainer [2022-01-11 06:00:42,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 06:00:42,298 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 06:00:42,298 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 06:00:42,299 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 06:00:42,301 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 06:00:42" (1/1) ... [2022-01-11 06:00:42,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 06:00:42 BasicIcfg [2022-01-11 06:00:42,391 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 06:00:42,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 06:00:42,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 06:00:42,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 06:00:42,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 06:00:41" (1/4) ... [2022-01-11 06:00:42,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@460f9318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 06:00:42, skipping insertion in model container [2022-01-11 06:00:42,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:42" (2/4) ... [2022-01-11 06:00:42,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@460f9318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 06:00:42, skipping insertion in model container [2022-01-11 06:00:42,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 06:00:42" (3/4) ... [2022-01-11 06:00:42,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@460f9318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 06:00:42, skipping insertion in model container [2022-01-11 06:00:42,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 06:00:42" (4/4) ... [2022-01-11 06:00:42,397 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_5-1.cTransformedIcfg [2022-01-11 06:00:42,400 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 06:00:42,401 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 06:00:42,458 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 06:00:42,471 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-11 06:00:42,471 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 06:00:42,485 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-11 06:00:42,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-11 06:00:42,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:42,490 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:42,490 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:42,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:42,495 INFO L85 PathProgramCache]: Analyzing trace with hash 2142902620, now seen corresponding path program 1 times [2022-01-11 06:00:42,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:42,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12429607] [2022-01-11 06:00:42,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:42,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:42,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:42,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:00:42,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:42,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12429607] [2022-01-11 06:00:42,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12429607] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:00:42,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:00:42,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 06:00:42,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981452496] [2022-01-11 06:00:42,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:00:42,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 06:00:42,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:42,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 06:00:42,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 06:00:42,787 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 06:00:42,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:42,871 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-01-11 06:00:42,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 06:00:42,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-11 06:00:42,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:42,878 INFO L225 Difference]: With dead ends: 29 [2022-01-11 06:00:42,879 INFO L226 Difference]: Without dead ends: 17 [2022-01-11 06:00:42,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-11 06:00:42,883 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:42,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 40 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 06:00:42,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-11 06:00:42,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-11 06:00:42,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-11 06:00:42,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-11 06:00:42,917 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-01-11 06:00:42,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:42,918 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-11 06:00:42,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 06:00:42,918 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-11 06:00:42,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 06:00:42,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:42,920 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:42,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 06:00:42,922 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:42,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:42,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1380246405, now seen corresponding path program 1 times [2022-01-11 06:00:42,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:42,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668324940] [2022-01-11 06:00:42,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:42,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:42,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:42,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:00:42,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:42,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668324940] [2022-01-11 06:00:42,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668324940] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:00:42,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:00:42,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 06:00:42,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538838688] [2022-01-11 06:00:42,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:00:42,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 06:00:42,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:42,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 06:00:42,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 06:00:42,993 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 06:00:43,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:43,053 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-01-11 06:00:43,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 06:00:43,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-11 06:00:43,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:43,055 INFO L225 Difference]: With dead ends: 23 [2022-01-11 06:00:43,055 INFO L226 Difference]: Without dead ends: 19 [2022-01-11 06:00:43,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-11 06:00:43,056 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:43,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 30 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:00:43,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-11 06:00:43,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-01-11 06:00:43,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-11 06:00:43,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-11 06:00:43,062 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2022-01-11 06:00:43,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:43,062 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-11 06:00:43,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 06:00:43,063 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-11 06:00:43,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 06:00:43,063 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:43,064 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:43,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 06:00:43,064 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:43,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:43,065 INFO L85 PathProgramCache]: Analyzing trace with hash -794894887, now seen corresponding path program 1 times [2022-01-11 06:00:43,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:43,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736361561] [2022-01-11 06:00:43,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:43,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:43,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:43,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:43,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:43,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:43,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:00:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 06:00:43,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:43,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736361561] [2022-01-11 06:00:43,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736361561] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:43,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561139980] [2022-01-11 06:00:43,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:43,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:43,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:43,301 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:00:43,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 06:00:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:43,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 06:00:43,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 06:00:43,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:00:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 06:00:44,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561139980] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:00:44,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:00:44,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 13 [2022-01-11 06:00:44,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113942073] [2022-01-11 06:00:44,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:00:44,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-11 06:00:44,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:44,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-11 06:00:44,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-11 06:00:44,457 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 13 states, 10 states have (on average 2.7) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-11 06:00:45,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:45,221 INFO L93 Difference]: Finished difference Result 46 states and 74 transitions. [2022-01-11 06:00:45,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 06:00:45,223 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.7) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 22 [2022-01-11 06:00:45,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:45,225 INFO L225 Difference]: With dead ends: 46 [2022-01-11 06:00:45,225 INFO L226 Difference]: Without dead ends: 32 [2022-01-11 06:00:45,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-11 06:00:45,227 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:45,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 62 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-11 06:00:45,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-11 06:00:45,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-01-11 06:00:45,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-11 06:00:45,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-01-11 06:00:45,244 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 22 [2022-01-11 06:00:45,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:45,244 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-01-11 06:00:45,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.7) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-11 06:00:45,244 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-01-11 06:00:45,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-11 06:00:45,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:45,247 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:45,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-11 06:00:45,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:45,468 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:45,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:45,468 INFO L85 PathProgramCache]: Analyzing trace with hash -577495408, now seen corresponding path program 1 times [2022-01-11 06:00:45,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:45,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088137253] [2022-01-11 06:00:45,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:45,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:45,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:45,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:45,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:45,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:45,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:45,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:45,669 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-11 06:00:45,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:45,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088137253] [2022-01-11 06:00:45,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088137253] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:45,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189991744] [2022-01-11 06:00:45,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:45,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:45,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:45,680 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:00:45,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 06:00:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:45,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 06:00:45,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:45,882 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-11 06:00:45,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:00:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-11 06:00:46,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189991744] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:00:46,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:00:46,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-01-11 06:00:46,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140894670] [2022-01-11 06:00:46,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:00:46,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-11 06:00:46,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:46,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-11 06:00:46,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-11 06:00:46,156 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-11 06:00:46,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:46,311 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2022-01-11 06:00:46,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 06:00:46,312 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) Word has length 36 [2022-01-11 06:00:46,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:46,313 INFO L225 Difference]: With dead ends: 43 [2022-01-11 06:00:46,313 INFO L226 Difference]: Without dead ends: 39 [2022-01-11 06:00:46,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-01-11 06:00:46,314 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:46,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 58 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 06:00:46,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-11 06:00:46,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2022-01-11 06:00:46,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2022-01-11 06:00:46,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 42 transitions. [2022-01-11 06:00:46,321 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 42 transitions. Word has length 36 [2022-01-11 06:00:46,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:46,321 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 42 transitions. [2022-01-11 06:00:46,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-11 06:00:46,321 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 42 transitions. [2022-01-11 06:00:46,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-11 06:00:46,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:46,322 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:46,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 06:00:46,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-11 06:00:46,528 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:46,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:46,528 INFO L85 PathProgramCache]: Analyzing trace with hash -74975079, now seen corresponding path program 2 times [2022-01-11 06:00:46,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:46,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877711571] [2022-01-11 06:00:46,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:46,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:46,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:46,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:46,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:46,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:46,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:46,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:46,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:46,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:46,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:46,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:46,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 19 proven. 74 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-11 06:00:46,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:46,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877711571] [2022-01-11 06:00:46,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877711571] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:46,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48304370] [2022-01-11 06:00:46,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 06:00:46,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:46,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:46,756 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:00:46,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 06:00:46,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 06:00:46,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:00:46,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 06:00:46,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 16 proven. 70 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-01-11 06:00:46,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:00:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-11 06:00:47,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48304370] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:00:47,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:00:47,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 9] total 21 [2022-01-11 06:00:47,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835324433] [2022-01-11 06:00:47,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:00:47,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-11 06:00:47,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:47,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-11 06:00:47,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-01-11 06:00:47,363 INFO L87 Difference]: Start difference. First operand 29 states and 42 transitions. Second operand has 21 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 13 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 9 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-11 06:00:47,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:47,592 INFO L93 Difference]: Finished difference Result 73 states and 121 transitions. [2022-01-11 06:00:47,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-11 06:00:47,593 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 13 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 9 states have call predecessors, (16), 13 states have call successors, (16) Word has length 61 [2022-01-11 06:00:47,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:47,594 INFO L225 Difference]: With dead ends: 73 [2022-01-11 06:00:47,594 INFO L226 Difference]: Without dead ends: 47 [2022-01-11 06:00:47,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2022-01-11 06:00:47,596 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:47,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 110 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 06:00:47,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-11 06:00:47,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2022-01-11 06:00:47,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (22), 10 states have call predecessors, (22), 7 states have call successors, (22) [2022-01-11 06:00:47,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 57 transitions. [2022-01-11 06:00:47,602 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 57 transitions. Word has length 61 [2022-01-11 06:00:47,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:47,603 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 57 transitions. [2022-01-11 06:00:47,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 13 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 9 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-11 06:00:47,603 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 57 transitions. [2022-01-11 06:00:47,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-11 06:00:47,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:47,605 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:47,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-11 06:00:47,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:47,820 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:47,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:47,820 INFO L85 PathProgramCache]: Analyzing trace with hash -360745829, now seen corresponding path program 3 times [2022-01-11 06:00:47,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:47,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884944899] [2022-01-11 06:00:47,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:47,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:47,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:47,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:48,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:48,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:48,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:48,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:00:48,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:48,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-11 06:00:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:48,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-11 06:00:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:48,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:48,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:48,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:48,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:00:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:48,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-11 06:00:48,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:48,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-11 06:00:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 49 proven. 108 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2022-01-11 06:00:48,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:48,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884944899] [2022-01-11 06:00:48,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884944899] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:48,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183165513] [2022-01-11 06:00:48,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 06:00:48,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:48,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:48,266 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:00:48,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 06:00:48,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-11 06:00:48,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:00:48,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 06:00:48,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:48,820 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 180 proven. 5 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-01-11 06:00:48,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:00:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 136 proven. 15 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2022-01-11 06:00:49,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183165513] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:00:49,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:00:49,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 8] total 23 [2022-01-11 06:00:49,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674994394] [2022-01-11 06:00:49,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:00:49,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-11 06:00:49,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:49,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-11 06:00:49,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-11 06:00:49,735 INFO L87 Difference]: Start difference. First operand 41 states and 57 transitions. Second operand has 23 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 20 states have internal predecessors, (43), 10 states have call successors, (15), 2 states have call predecessors, (15), 8 states have return successors, (19), 8 states have call predecessors, (19), 10 states have call successors, (19) [2022-01-11 06:00:50,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:50,045 INFO L93 Difference]: Finished difference Result 75 states and 107 transitions. [2022-01-11 06:00:50,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 06:00:50,045 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 20 states have internal predecessors, (43), 10 states have call successors, (15), 2 states have call predecessors, (15), 8 states have return successors, (19), 8 states have call predecessors, (19), 10 states have call successors, (19) Word has length 83 [2022-01-11 06:00:50,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:50,046 INFO L225 Difference]: With dead ends: 75 [2022-01-11 06:00:50,046 INFO L226 Difference]: Without dead ends: 35 [2022-01-11 06:00:50,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2022-01-11 06:00:50,048 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:50,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 113 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 06:00:50,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-11 06:00:50,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-11 06:00:50,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 23 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-01-11 06:00:50,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-01-11 06:00:50,053 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 83 [2022-01-11 06:00:50,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:50,054 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-01-11 06:00:50,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 20 states have internal predecessors, (43), 10 states have call successors, (15), 2 states have call predecessors, (15), 8 states have return successors, (19), 8 states have call predecessors, (19), 10 states have call successors, (19) [2022-01-11 06:00:50,054 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-01-11 06:00:50,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-11 06:00:50,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:50,055 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:50,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-11 06:00:50,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:50,260 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:50,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:50,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1361828763, now seen corresponding path program 4 times [2022-01-11 06:00:50,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:50,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588724040] [2022-01-11 06:00:50,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:50,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:50,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:50,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:50,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:50,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:50,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:50,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:50,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:50,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:50,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 06:00:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:50,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:50,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:50,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:50,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:50,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:50,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:50,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 06:00:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 44 proven. 109 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-01-11 06:00:50,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:50,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588724040] [2022-01-11 06:00:50,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588724040] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:50,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245341505] [2022-01-11 06:00:50,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 06:00:50,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:50,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:50,542 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:00:50,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-11 06:00:50,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 06:00:50,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:00:50,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 06:00:50,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 44 proven. 102 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-01-11 06:00:50,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:00:51,338 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 44 proven. 109 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-01-11 06:00:51,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245341505] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:00:51,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:00:51,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 9] total 20 [2022-01-11 06:00:51,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474380073] [2022-01-11 06:00:51,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:00:51,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-11 06:00:51,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:51,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-11 06:00:51,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-11 06:00:51,340 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 20 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 06:00:51,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:51,680 INFO L93 Difference]: Finished difference Result 73 states and 103 transitions. [2022-01-11 06:00:51,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-11 06:00:51,680 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) Word has length 87 [2022-01-11 06:00:51,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:51,681 INFO L225 Difference]: With dead ends: 73 [2022-01-11 06:00:51,682 INFO L226 Difference]: Without dead ends: 43 [2022-01-11 06:00:51,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-01-11 06:00:51,683 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:51,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 109 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 06:00:51,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-11 06:00:51,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-01-11 06:00:51,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (15), 9 states have call predecessors, (15), 7 states have call successors, (15) [2022-01-11 06:00:51,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2022-01-11 06:00:51,689 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 87 [2022-01-11 06:00:51,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:51,690 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2022-01-11 06:00:51,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 06:00:51,690 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-01-11 06:00:51,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-11 06:00:51,691 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:51,691 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:51,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-11 06:00:51,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:51,896 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:51,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:51,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1737339745, now seen corresponding path program 5 times [2022-01-11 06:00:51,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:51,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584930793] [2022-01-11 06:00:51,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:51,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:51,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:52,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 06:00:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-11 06:00:52,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:52,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:52,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:52,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 06:00:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-11 06:00:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 257 proven. 368 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2022-01-11 06:00:52,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:52,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584930793] [2022-01-11 06:00:52,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584930793] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:52,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171022994] [2022-01-11 06:00:52,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-11 06:00:52,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:52,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:52,753 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:00:52,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-11 06:00:53,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-01-11 06:00:53,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:00:53,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-11 06:00:53,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:01:09,221 WARN L228 SmtUtils]: Spent 14.59s on a formula simplification. DAG size of input: 5011 DAG size of output: 1950 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-01-11 06:01:15,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 293 proven. 252 refuted. 0 times theorem prover too weak. 566 trivial. 0 not checked. [2022-01-11 06:01:15,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:01:17,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 307 proven. 276 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-01-11 06:01:17,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171022994] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:01:17,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:01:17,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 16] total 41 [2022-01-11 06:01:17,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993856498] [2022-01-11 06:01:17,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:01:17,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-11 06:01:17,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:01:17,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-11 06:01:17,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1413, Unknown=0, NotChecked=0, Total=1640 [2022-01-11 06:01:17,367 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 41 states, 30 states have (on average 2.533333333333333) internal successors, (76), 35 states have internal predecessors, (76), 25 states have call successors, (31), 1 states have call predecessors, (31), 15 states have return successors, (38), 23 states have call predecessors, (38), 25 states have call successors, (38) [2022-01-11 06:01:18,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:01:18,788 INFO L93 Difference]: Finished difference Result 95 states and 137 transitions. [2022-01-11 06:01:18,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-11 06:01:18,788 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 30 states have (on average 2.533333333333333) internal successors, (76), 35 states have internal predecessors, (76), 25 states have call successors, (31), 1 states have call predecessors, (31), 15 states have return successors, (38), 23 states have call predecessors, (38), 25 states have call successors, (38) Word has length 137 [2022-01-11 06:01:18,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:01:18,789 INFO L225 Difference]: With dead ends: 95 [2022-01-11 06:01:18,789 INFO L226 Difference]: Without dead ends: 58 [2022-01-11 06:01:18,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 279 SyntacticMatches, 18 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=459, Invalid=2193, Unknown=0, NotChecked=0, Total=2652 [2022-01-11 06:01:18,791 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 147 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-11 06:01:18,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 229 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-11 06:01:18,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-11 06:01:18,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2022-01-11 06:01:18,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.0) internal successors, (32), 32 states have internal predecessors, (32), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-11 06:01:18,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-01-11 06:01:18,800 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 137 [2022-01-11 06:01:18,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:01:18,800 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-01-11 06:01:18,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 30 states have (on average 2.533333333333333) internal successors, (76), 35 states have internal predecessors, (76), 25 states have call successors, (31), 1 states have call predecessors, (31), 15 states have return successors, (38), 23 states have call predecessors, (38), 25 states have call successors, (38) [2022-01-11 06:01:18,800 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-01-11 06:01:18,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-11 06:01:18,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:18,801 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:18,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-11 06:01:19,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:19,007 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:19,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:19,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1515641660, now seen corresponding path program 6 times [2022-01-11 06:01:19,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:19,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515053584] [2022-01-11 06:01:19,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:19,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:19,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:19,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:19,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:19,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:01:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:19,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:01:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:19,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:01:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:19,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:01:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:19,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:01:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:19,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:01:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:19,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 06:01:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:19,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:01:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:19,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:01:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:19,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-11 06:01:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:19,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:01:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:19,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:01:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:19,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:01:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:19,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:01:19,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:19,576 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 16 proven. 200 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-01-11 06:01:19,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:19,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515053584] [2022-01-11 06:01:19,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515053584] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:01:19,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958255181] [2022-01-11 06:01:19,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-11 06:01:19,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:19,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:01:19,577 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:01:19,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-11 06:01:19,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-01-11 06:01:19,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:01:19,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 72 conjunts are in the unsatisfiable core [2022-01-11 06:01:19,831 INFO L286 TraceCheckSpWp]: Computing forward predicates...