/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_7-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 06:00:47,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 06:00:47,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 06:00:47,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 06:00:47,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 06:00:47,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 06:00:47,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 06:00:47,886 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 06:00:47,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 06:00:47,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 06:00:47,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 06:00:47,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 06:00:47,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 06:00:47,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 06:00:47,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 06:00:47,919 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 06:00:47,920 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 06:00:47,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 06:00:47,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 06:00:47,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 06:00:47,923 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 06:00:47,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 06:00:47,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 06:00:47,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 06:00:47,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 06:00:47,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 06:00:47,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 06:00:47,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 06:00:47,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 06:00:47,928 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 06:00:47,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 06:00:47,928 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 06:00:47,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 06:00:47,929 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 06:00:47,930 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 06:00:47,930 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 06:00:47,930 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 06:00:47,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 06:00:47,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 06:00:47,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 06:00:47,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 06:00:47,932 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 06:00:47,945 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 06:00:47,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 06:00:47,946 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 06:00:47,946 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 06:00:47,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 06:00:47,947 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 06:00:47,947 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 06:00:47,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 06:00:47,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 06:00:47,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 06:00:47,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 06:00:47,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 06:00:47,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 06:00:47,947 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 06:00:47,947 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 06:00:47,948 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 06:00:47,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 06:00:47,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 06:00:47,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 06:00:47,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 06:00:47,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 06:00:47,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 06:00:47,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 06:00:47,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 06:00:47,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 06:00:47,949 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 06:00:47,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 06:00:47,949 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 06:00:47,949 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 06:00:47,949 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 06:00:47,949 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 06:00:47,949 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 06:00:47,949 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 06:00:47,950 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 06:00:48,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 06:00:48,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 06:00:48,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 06:00:48,117 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 06:00:48,119 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 06:00:48,120 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2022-01-11 06:00:48,162 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb82237a/2562d6ea3f6b4215b7d2c755030d4534/FLAGaa09a626d [2022-01-11 06:00:48,512 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 06:00:48,513 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2022-01-11 06:00:48,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb82237a/2562d6ea3f6b4215b7d2c755030d4534/FLAGaa09a626d [2022-01-11 06:00:48,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb82237a/2562d6ea3f6b4215b7d2c755030d4534 [2022-01-11 06:00:48,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 06:00:48,547 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 06:00:48,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 06:00:48,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 06:00:48,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 06:00:48,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 06:00:48" (1/1) ... [2022-01-11 06:00:48,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8354497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:48, skipping insertion in model container [2022-01-11 06:00:48,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 06:00:48" (1/1) ... [2022-01-11 06:00:48,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 06:00:48,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 06:00:48,706 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_7-1.c[741,754] [2022-01-11 06:00:48,708 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 06:00:48,727 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 06:00:48,740 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_7-1.c[741,754] [2022-01-11 06:00:48,742 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 06:00:48,753 INFO L208 MainTranslator]: Completed translation [2022-01-11 06:00:48,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:48 WrapperNode [2022-01-11 06:00:48,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 06:00:48,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 06:00:48,755 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 06:00:48,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 06:00:48,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:48" (1/1) ... [2022-01-11 06:00:48,767 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:48" (1/1) ... [2022-01-11 06:00:48,782 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-11 06:00:48,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 06:00:48,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 06:00:48,783 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 06:00:48,783 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 06:00:48,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:48" (1/1) ... [2022-01-11 06:00:48,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:48" (1/1) ... [2022-01-11 06:00:48,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:48" (1/1) ... [2022-01-11 06:00:48,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:48" (1/1) ... [2022-01-11 06:00:48,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:48" (1/1) ... [2022-01-11 06:00:48,795 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:48" (1/1) ... [2022-01-11 06:00:48,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:48" (1/1) ... [2022-01-11 06:00:48,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 06:00:48,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 06:00:48,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 06:00:48,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 06:00:48,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:48" (1/1) ... [2022-01-11 06:00:48,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 06:00:48,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:48,830 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 06:00:48,832 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 06:00:48,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 06:00:48,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 06:00:48,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 06:00:48,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 06:00:48,856 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-01-11 06:00:48,856 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-01-11 06:00:48,904 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 06:00:48,905 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 06:00:48,966 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 06:00:48,970 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 06:00:48,971 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-11 06:00:48,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 06:00:48 BoogieIcfgContainer [2022-01-11 06:00:48,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 06:00:48,973 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 06:00:48,973 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 06:00:48,974 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 06:00:48,978 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 06:00:48" (1/1) ... [2022-01-11 06:00:49,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 06:00:49 BasicIcfg [2022-01-11 06:00:49,045 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 06:00:49,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 06:00:49,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 06:00:49,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 06:00:49,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 06:00:48" (1/4) ... [2022-01-11 06:00:49,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a2285d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 06:00:49, skipping insertion in model container [2022-01-11 06:00:49,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:00:48" (2/4) ... [2022-01-11 06:00:49,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a2285d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 06:00:49, skipping insertion in model container [2022-01-11 06:00:49,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 06:00:48" (3/4) ... [2022-01-11 06:00:49,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a2285d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 06:00:49, skipping insertion in model container [2022-01-11 06:00:49,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 06:00:49" (4/4) ... [2022-01-11 06:00:49,062 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_7-1.cTransformedIcfg [2022-01-11 06:00:49,065 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 06:00:49,065 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 06:00:49,101 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 06:00:49,108 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 06:00:49,109 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 06:00:49,125 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 06:00:49,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-11 06:00:49,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:49,129 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:49,130 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:49,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:49,134 INFO L85 PathProgramCache]: Analyzing trace with hash 2142902620, now seen corresponding path program 1 times [2022-01-11 06:00:49,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:49,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007804299] [2022-01-11 06:00:49,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:49,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:49,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:49,427 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 06:00:49,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:49,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007804299] [2022-01-11 06:00:49,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007804299] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:00:49,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:00:49,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 06:00:49,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799040903] [2022-01-11 06:00:49,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:00:49,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 06:00:49,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:49,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 06:00:49,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 06:00:49,456 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 06:00:49,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:49,551 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-01-11 06:00:49,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 06:00:49,554 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 06:00:49,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:49,562 INFO L225 Difference]: With dead ends: 29 [2022-01-11 06:00:49,562 INFO L226 Difference]: Without dead ends: 17 [2022-01-11 06:00:49,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-11 06:00:49,568 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 06:00:49,568 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 06:00:49,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-11 06:00:49,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-11 06:00:49,590 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 06:00:49,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-11 06:00:49,591 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-01-11 06:00:49,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:49,592 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-11 06:00:49,592 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 06:00:49,592 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-11 06:00:49,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 06:00:49,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:49,593 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:49,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 06:00:49,593 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:49,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:49,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1380246405, now seen corresponding path program 1 times [2022-01-11 06:00:49,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:49,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908162237] [2022-01-11 06:00:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:49,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:49,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:49,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:49,647 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 06:00:49,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:49,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908162237] [2022-01-11 06:00:49,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908162237] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:00:49,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:00:49,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 06:00:49,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41678128] [2022-01-11 06:00:49,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:00:49,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 06:00:49,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:49,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 06:00:49,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 06:00:49,650 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 06:00:49,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:49,694 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-01-11 06:00:49,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 06:00:49,694 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 06:00:49,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:49,696 INFO L225 Difference]: With dead ends: 23 [2022-01-11 06:00:49,696 INFO L226 Difference]: Without dead ends: 19 [2022-01-11 06:00:49,701 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 06:00:49,701 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 06:00:49,702 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 06:00:49,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-11 06:00:49,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-01-11 06:00:49,705 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 06:00:49,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-11 06:00:49,706 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2022-01-11 06:00:49,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:49,706 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-11 06:00:49,706 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 06:00:49,707 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-11 06:00:49,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 06:00:49,707 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:49,707 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 06:00:49,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 06:00:49,708 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:49,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:49,708 INFO L85 PathProgramCache]: Analyzing trace with hash -794894887, now seen corresponding path program 1 times [2022-01-11 06:00:49,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:49,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165312041] [2022-01-11 06:00:49,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:49,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:49,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:49,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:49,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:49,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:49,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:00:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:49,957 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 06:00:49,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:49,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165312041] [2022-01-11 06:00:49,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165312041] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:49,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787219439] [2022-01-11 06:00:49,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:49,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:49,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:49,960 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 06:00:49,961 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 06:00:50,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:50,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 06:00:50,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:50,230 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 06:00:50,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:00:50,903 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 06:00:50,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787219439] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:00:50,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:00:50,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 13 [2022-01-11 06:00:50,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907184311] [2022-01-11 06:00:50,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:00:50,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-11 06:00:50,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:50,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-11 06:00:50,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-11 06:00:50,905 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 06:00:51,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:51,674 INFO L93 Difference]: Finished difference Result 46 states and 74 transitions. [2022-01-11 06:00:51,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 06:00:51,675 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 06:00:51,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:51,676 INFO L225 Difference]: With dead ends: 46 [2022-01-11 06:00:51,676 INFO L226 Difference]: Without dead ends: 32 [2022-01-11 06:00:51,677 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 06:00:51,678 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 06:00:51,678 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 06:00:51,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-11 06:00:51,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-01-11 06:00:51,686 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 06:00:51,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-01-11 06:00:51,687 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 22 [2022-01-11 06:00:51,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:51,687 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-01-11 06:00:51,688 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 06:00:51,688 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-01-11 06:00:51,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-11 06:00:51,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:51,690 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 06:00:51,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-11 06:00:51,891 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 06:00:51,891 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:51,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:51,892 INFO L85 PathProgramCache]: Analyzing trace with hash -577495408, now seen corresponding path program 1 times [2022-01-11 06:00:51,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:51,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6505964] [2022-01-11 06:00:51,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:51,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:51,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,068 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 06:00:52,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:52,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6505964] [2022-01-11 06:00:52,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6505964] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:52,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068802987] [2022-01-11 06:00:52,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:52,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:52,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:52,071 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 06:00:52,072 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 06:00:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 06:00:52,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:52,261 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 06:00:52,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:00:52,507 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 06:00:52,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068802987] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:00:52,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:00:52,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-01-11 06:00:52,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756425329] [2022-01-11 06:00:52,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:00:52,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-11 06:00:52,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:52,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-11 06:00:52,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-11 06:00:52,515 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 06:00:52,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:52,645 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2022-01-11 06:00:52,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 06:00:52,647 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 06:00:52,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:52,648 INFO L225 Difference]: With dead ends: 43 [2022-01-11 06:00:52,648 INFO L226 Difference]: Without dead ends: 39 [2022-01-11 06:00:52,648 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 06:00:52,649 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 06:00:52,649 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 06:00:52,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-11 06:00:52,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2022-01-11 06:00:52,656 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 06:00:52,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 42 transitions. [2022-01-11 06:00:52,656 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 42 transitions. Word has length 36 [2022-01-11 06:00:52,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:52,657 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 42 transitions. [2022-01-11 06:00:52,657 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 06:00:52,657 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 42 transitions. [2022-01-11 06:00:52,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-11 06:00:52,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:52,658 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 06:00:52,678 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 06:00:52,871 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 06:00:52,872 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:52,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:52,872 INFO L85 PathProgramCache]: Analyzing trace with hash -74975079, now seen corresponding path program 2 times [2022-01-11 06:00:52,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:52,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390924536] [2022-01-11 06:00:52,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:52,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:52,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:53,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:53,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:53,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:53,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:53,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:53,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:53,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:53,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:53,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:53,103 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 06:00:53,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:53,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390924536] [2022-01-11 06:00:53,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390924536] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:53,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071521882] [2022-01-11 06:00:53,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 06:00:53,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:53,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:53,104 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 06:00:53,106 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 06:00:53,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 06:00:53,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:00:53,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 06:00:53,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 59 proven. 26 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-01-11 06:00:53,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:00:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 59 proven. 34 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-11 06:00:53,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071521882] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:00:53,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:00:53,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 9] total 21 [2022-01-11 06:00:53,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027368089] [2022-01-11 06:00:53,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:00:53,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-11 06:00:53,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:53,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-11 06:00:53,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-11 06:00:53,756 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), 10 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 06:00:53,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:53,995 INFO L93 Difference]: Finished difference Result 81 states and 152 transitions. [2022-01-11 06:00:53,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 06:00:53,997 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), 10 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) Word has length 61 [2022-01-11 06:00:53,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:53,999 INFO L225 Difference]: With dead ends: 81 [2022-01-11 06:00:53,999 INFO L226 Difference]: Without dead ends: 55 [2022-01-11 06:00:53,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2022-01-11 06:00:54,000 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:54,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 112 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 06:00:54,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-11 06:00:54,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-01-11 06:00:54,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 7 states have call successors, (7), 2 states have call predecessors, (7), 11 states have return successors, (43), 15 states have call predecessors, (43), 7 states have call successors, (43) [2022-01-11 06:00:54,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 82 transitions. [2022-01-11 06:00:54,011 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 82 transitions. Word has length 61 [2022-01-11 06:00:54,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:54,012 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 82 transitions. [2022-01-11 06:00:54,012 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), 10 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 06:00:54,012 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 82 transitions. [2022-01-11 06:00:54,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-11 06:00:54,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:54,014 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:54,034 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 06:00:54,219 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 06:00:54,220 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:54,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:54,220 INFO L85 PathProgramCache]: Analyzing trace with hash 311221116, now seen corresponding path program 2 times [2022-01-11 06:00:54,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:54,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019964645] [2022-01-11 06:00:54,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:54,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:54,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:54,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:54,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:54,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:54,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:00:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:54,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-11 06:00:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:54,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-11 06:00:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:54,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:54,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:54,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:54,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:00:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:54,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-11 06:00:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:54,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-11 06:00:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 49 proven. 106 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-01-11 06:00:54,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:54,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019964645] [2022-01-11 06:00:54,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019964645] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:54,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989328674] [2022-01-11 06:00:54,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 06:00:54,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:54,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:54,654 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 06:00:54,656 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 06:00:54,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 06:00:54,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:00:54,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-11 06:00:54,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:55,090 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 211 proven. 2 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-01-11 06:00:55,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:00:55,647 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 130 proven. 19 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2022-01-11 06:00:55,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989328674] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:00:55,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:00:55,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 8] total 23 [2022-01-11 06:00:55,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241644110] [2022-01-11 06:00:55,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:00:55,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-11 06:00:55,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:55,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-11 06:00:55,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-01-11 06:00:55,651 INFO L87 Difference]: Start difference. First operand 49 states and 82 transitions. Second operand has 23 states, 17 states have (on average 2.411764705882353) internal successors, (41), 22 states have internal predecessors, (41), 10 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (16), 5 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 06:00:55,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:55,782 INFO L93 Difference]: Finished difference Result 84 states and 154 transitions. [2022-01-11 06:00:55,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 06:00:55,784 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 2.411764705882353) internal successors, (41), 22 states have internal predecessors, (41), 10 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (16), 5 states have call predecessors, (16), 10 states have call successors, (16) Word has length 82 [2022-01-11 06:00:55,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:55,784 INFO L225 Difference]: With dead ends: 84 [2022-01-11 06:00:55,784 INFO L226 Difference]: Without dead ends: 38 [2022-01-11 06:00:55,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 177 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2022-01-11 06:00:55,786 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:55,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 84 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 06:00:55,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-11 06:00:55,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-01-11 06:00:55,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (23), 10 states have call predecessors, (23), 5 states have call successors, (23) [2022-01-11 06:00:55,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 54 transitions. [2022-01-11 06:00:55,792 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 54 transitions. Word has length 82 [2022-01-11 06:00:55,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:55,792 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 54 transitions. [2022-01-11 06:00:55,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 2.411764705882353) internal successors, (41), 22 states have internal predecessors, (41), 10 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (16), 5 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 06:00:55,792 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 54 transitions. [2022-01-11 06:00:55,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-11 06:00:55,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:55,796 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:55,816 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 06:00:56,008 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 06:00:56,008 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:56,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:56,009 INFO L85 PathProgramCache]: Analyzing trace with hash 326140542, now seen corresponding path program 3 times [2022-01-11 06:00:56,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:56,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074539498] [2022-01-11 06:00:56,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:56,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:56,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:56,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:56,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:56,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:56,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:56,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:56,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:56,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:56,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-11 06:00:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:56,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:56,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 90 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-01-11 06:00:56,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:56,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074539498] [2022-01-11 06:00:56,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074539498] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:56,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788896413] [2022-01-11 06:00:56,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 06:00:56,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:56,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:56,216 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 06:00:56,217 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 06:00:56,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-11 06:00:56,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:00:56,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 06:00:56,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-01-11 06:00:56,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:00:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 60 proven. 30 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-01-11 06:00:57,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788896413] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:00:57,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:00:57,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 9] total 21 [2022-01-11 06:00:57,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950324262] [2022-01-11 06:00:57,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:00:57,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-11 06:00:57,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:57,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-11 06:00:57,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-11 06:00:57,185 INFO L87 Difference]: Start difference. First operand 38 states and 54 transitions. Second operand has 21 states, 17 states have (on average 2.764705882352941) internal successors, (47), 19 states have internal predecessors, (47), 12 states have call successors, (15), 1 states have call predecessors, (15), 10 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2022-01-11 06:00:57,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:57,612 INFO L93 Difference]: Finished difference Result 88 states and 158 transitions. [2022-01-11 06:00:57,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-11 06:00:57,613 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.764705882352941) internal successors, (47), 19 states have internal predecessors, (47), 12 states have call successors, (15), 1 states have call predecessors, (15), 10 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) Word has length 60 [2022-01-11 06:00:57,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:57,614 INFO L225 Difference]: With dead ends: 88 [2022-01-11 06:00:57,614 INFO L226 Difference]: Without dead ends: 53 [2022-01-11 06:00:57,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-01-11 06:00:57,616 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:57,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 120 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-11 06:00:57,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-11 06:00:57,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2022-01-11 06:00:57,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 29 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 10 states have return successors, (32), 12 states have call predecessors, (32), 6 states have call successors, (32) [2022-01-11 06:00:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 67 transitions. [2022-01-11 06:00:57,623 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 67 transitions. Word has length 60 [2022-01-11 06:00:57,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:57,623 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 67 transitions. [2022-01-11 06:00:57,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.764705882352941) internal successors, (47), 19 states have internal predecessors, (47), 12 states have call successors, (15), 1 states have call predecessors, (15), 10 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2022-01-11 06:00:57,624 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 67 transitions. [2022-01-11 06:00:57,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-11 06:00:57,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:57,629 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 18, 13, 13, 13, 13, 13, 13, 9, 5, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:57,646 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 06:00:57,839 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 06:00:57,839 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:57,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:57,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1898382172, now seen corresponding path program 4 times [2022-01-11 06:00:57,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:57,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537188402] [2022-01-11 06:00:57,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:57,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:57,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:58,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-11 06:00:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-11 06:00:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:58,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-11 06:00:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:58,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-11 06:00:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-11 06:00:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 78 proven. 501 refuted. 0 times theorem prover too weak. 1212 trivial. 0 not checked. [2022-01-11 06:00:58,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:58,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537188402] [2022-01-11 06:00:58,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537188402] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:58,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500048209] [2022-01-11 06:00:58,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 06:00:58,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:58,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:58,551 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 06:00:58,552 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 06:00:59,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 06:00:59,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:00:59,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-11 06:00:59,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:01:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 65 proven. 470 refuted. 0 times theorem prover too weak. 1256 trivial. 0 not checked. [2022-01-11 06:01:07,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:01:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 65 proven. 496 refuted. 0 times theorem prover too weak. 1230 trivial. 0 not checked. [2022-01-11 06:01:08,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500048209] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:01:08,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:01:08,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 13] total 32 [2022-01-11 06:01:08,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852995096] [2022-01-11 06:01:08,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:01:08,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-11 06:01:08,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:01:08,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-11 06:01:08,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2022-01-11 06:01:08,514 INFO L87 Difference]: Start difference. First operand 44 states and 67 transitions. Second operand has 32 states, 26 states have (on average 2.5) internal successors, (65), 29 states have internal predecessors, (65), 21 states have call successors, (22), 1 states have call predecessors, (22), 15 states have return successors, (28), 15 states have call predecessors, (28), 21 states have call successors, (28) [2022-01-11 06:01:10,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:01:10,336 INFO L93 Difference]: Finished difference Result 91 states and 179 transitions. [2022-01-11 06:01:10,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-11 06:01:10,337 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 2.5) internal successors, (65), 29 states have internal predecessors, (65), 21 states have call successors, (22), 1 states have call predecessors, (22), 15 states have return successors, (28), 15 states have call predecessors, (28), 21 states have call successors, (28) Word has length 171 [2022-01-11 06:01:10,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:01:10,341 INFO L225 Difference]: With dead ends: 91 [2022-01-11 06:01:10,342 INFO L226 Difference]: Without dead ends: 48 [2022-01-11 06:01:10,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 372 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=332, Invalid=1560, Unknown=0, NotChecked=0, Total=1892 [2022-01-11 06:01:10,343 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 125 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-11 06:01:10,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 232 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-11 06:01:10,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-11 06:01:10,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-01-11 06:01:10,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (19), 11 states have call predecessors, (19), 9 states have call successors, (19) [2022-01-11 06:01:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-01-11 06:01:10,361 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 171 [2022-01-11 06:01:10,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:01:10,361 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-01-11 06:01:10,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 2.5) internal successors, (65), 29 states have internal predecessors, (65), 21 states have call successors, (22), 1 states have call predecessors, (22), 15 states have return successors, (28), 15 states have call predecessors, (28), 21 states have call successors, (28) [2022-01-11 06:01:10,362 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-01-11 06:01:10,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-01-11 06:01:10,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:10,363 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:10,375 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 06:01:10,568 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 06:01:10,569 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:10,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:10,569 INFO L85 PathProgramCache]: Analyzing trace with hash -2094436169, now seen corresponding path program 5 times [2022-01-11 06:01:10,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:10,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147248822] [2022-01-11 06:01:10,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:10,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:10,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:10,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:10,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:01:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:01:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:01:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:01:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:01:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:01:11,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:01:11,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 06:01:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:01:11,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:01:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-11 06:01:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:01:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:01:11,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:01:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:01:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-11 06:01:11,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:01:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:01:11,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:01:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:01:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:01:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:01:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 06:01:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:01:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:01:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-11 06:01:11,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:01:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:01:11,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:01:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:01:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:11,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 134 proven. 539 refuted. 0 times theorem prover too weak. 1802 trivial. 0 not checked. [2022-01-11 06:01:11,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:11,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147248822] [2022-01-11 06:01:11,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147248822] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:01:11,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406963295] [2022-01-11 06:01:11,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-11 06:01:11,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:11,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:01:11,351 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 06:01:11,353 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 06:01:12,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-01-11 06:01:12,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:01:12,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-11 06:01:12,120 INFO L286 TraceCheckSpWp]: Computing forward predicates...