/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf -i ../../../trunk/examples/svcomp/loop-simple/deep-nested.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 20:24:25,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 20:24:25,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 20:24:25,837 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 20:24:25,837 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 20:24:25,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 20:24:25,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 20:24:25,846 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 20:24:25,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 20:24:25,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 20:24:25,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 20:24:25,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 20:24:25,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 20:24:25,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 20:24:25,856 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 20:24:25,859 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 20:24:25,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 20:24:25,860 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 20:24:25,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 20:24:25,861 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 20:24:25,862 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 20:24:25,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 20:24:25,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 20:24:25,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 20:24:25,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 20:24:25,872 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 20:24:25,873 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 20:24:25,873 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 20:24:25,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 20:24:25,874 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 20:24:25,874 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 20:24:25,875 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 20:24:25,875 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 20:24:25,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 20:24:25,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 20:24:25,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 20:24:25,880 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-10 20:24:25,905 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 20:24:25,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 20:24:25,906 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 20:24:25,906 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 20:24:25,907 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 20:24:25,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 20:24:25,907 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 20:24:25,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 20:24:25,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 20:24:25,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 20:24:25,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 20:24:25,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 20:24:25,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 20:24:25,908 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 20:24:25,908 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 20:24:25,908 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 20:24:25,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 20:24:25,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 20:24:25,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 20:24:25,909 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 20:24:25,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 20:24:25,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 20:24:25,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 20:24:25,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 20:24:25,910 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 20:24:25,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 20:24:25,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 20:24:25,911 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 20:24:25,911 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 20:24:25,911 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 20:24:25,911 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 20:24:25,911 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 20:24:25,912 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 20:24:25,912 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 20:24:26,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 20:24:26,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 20:24:26,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 20:24:26,098 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 20:24:26,099 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 20:24:26,099 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/deep-nested.c [2022-01-10 20:24:26,138 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4b7f887b/d979150856e0498589fab3ab8c9bcbaf/FLAGc4684ceaf [2022-01-10 20:24:26,502 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 20:24:26,502 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/deep-nested.c [2022-01-10 20:24:26,509 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4b7f887b/d979150856e0498589fab3ab8c9bcbaf/FLAGc4684ceaf [2022-01-10 20:24:26,519 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4b7f887b/d979150856e0498589fab3ab8c9bcbaf [2022-01-10 20:24:26,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 20:24:26,523 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 20:24:26,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 20:24:26,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 20:24:26,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 20:24:26,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:24:26" (1/1) ... [2022-01-10 20:24:26,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fe55f22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:26, skipping insertion in model container [2022-01-10 20:24:26,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:24:26" (1/1) ... [2022-01-10 20:24:26,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 20:24:26,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 20:24:26,709 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/deep-nested.c[625,638] [2022-01-10 20:24:26,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 20:24:26,739 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 20:24:26,768 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/deep-nested.c[625,638] [2022-01-10 20:24:26,769 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 20:24:26,781 INFO L208 MainTranslator]: Completed translation [2022-01-10 20:24:26,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:26 WrapperNode [2022-01-10 20:24:26,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 20:24:26,782 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 20:24:26,782 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 20:24:26,782 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 20:24:26,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:26" (1/1) ... [2022-01-10 20:24:26,793 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:26" (1/1) ... [2022-01-10 20:24:26,807 INFO L137 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 61 [2022-01-10 20:24:26,807 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 20:24:26,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 20:24:26,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 20:24:26,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 20:24:26,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:26" (1/1) ... [2022-01-10 20:24:26,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:26" (1/1) ... [2022-01-10 20:24:26,822 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:26" (1/1) ... [2022-01-10 20:24:26,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:26" (1/1) ... [2022-01-10 20:24:26,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:26" (1/1) ... [2022-01-10 20:24:26,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:26" (1/1) ... [2022-01-10 20:24:26,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:26" (1/1) ... [2022-01-10 20:24:26,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 20:24:26,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 20:24:26,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 20:24:26,840 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 20:24:26,841 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:26" (1/1) ... [2022-01-10 20:24:26,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 20:24:26,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:24:26,866 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 20:24:26,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 20:24:26,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 20:24:26,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 20:24:26,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 20:24:26,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 20:24:26,943 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 20:24:26,944 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 20:24:27,058 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 20:24:27,062 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 20:24:27,062 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-10 20:24:27,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:24:27 BoogieIcfgContainer [2022-01-10 20:24:27,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 20:24:27,063 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 20:24:27,064 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 20:24:27,065 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 20:24:27,067 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:24:27" (1/1) ... [2022-01-10 20:24:27,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:24:27 BasicIcfg [2022-01-10 20:24:27,143 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 20:24:27,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 20:24:27,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 20:24:27,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 20:24:27,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:24:26" (1/4) ... [2022-01-10 20:24:27,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bbac9d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:24:27, skipping insertion in model container [2022-01-10 20:24:27,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:26" (2/4) ... [2022-01-10 20:24:27,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bbac9d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:24:27, skipping insertion in model container [2022-01-10 20:24:27,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:24:27" (3/4) ... [2022-01-10 20:24:27,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bbac9d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 08:24:27, skipping insertion in model container [2022-01-10 20:24:27,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:24:27" (4/4) ... [2022-01-10 20:24:27,164 INFO L111 eAbstractionObserver]: Analyzing ICFG deep-nested.cTransformedIcfg [2022-01-10 20:24:27,167 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 20:24:27,167 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 20:24:27,207 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 20:24:27,214 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 20:24:27,214 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 20:24:27,224 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:27,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-10 20:24:27,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:24:27,227 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:24:27,228 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:24:27,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:24:27,231 INFO L85 PathProgramCache]: Analyzing trace with hash 551657624, now seen corresponding path program 1 times [2022-01-10 20:24:27,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:24:27,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240275062] [2022-01-10 20:24:27,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:27,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:24:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:24:27,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:24:27,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240275062] [2022-01-10 20:24:27,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240275062] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:24:27,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:24:27,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 20:24:27,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938404718] [2022-01-10 20:24:27,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:24:27,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 20:24:27,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:24:27,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 20:24:27,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 20:24:27,555 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:27,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:24:27,635 INFO L93 Difference]: Finished difference Result 39 states and 62 transitions. [2022-01-10 20:24:27,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 20:24:27,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-01-10 20:24:27,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:24:27,643 INFO L225 Difference]: With dead ends: 39 [2022-01-10 20:24:27,643 INFO L226 Difference]: Without dead ends: 18 [2022-01-10 20:24:27,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 20:24:27,648 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:24:27,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 20 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:24:27,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-10 20:24:27,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-01-10 20:24:27,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:27,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 20:24:27,673 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2022-01-10 20:24:27,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:24:27,673 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 20:24:27,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:27,673 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 20:24:27,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 20:24:27,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:24:27,674 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:24:27,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 20:24:27,675 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:24:27,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:24:27,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1888481578, now seen corresponding path program 1 times [2022-01-10 20:24:27,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:24:27,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518796660] [2022-01-10 20:24:27,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:27,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:24:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:24:27,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:24:27,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518796660] [2022-01-10 20:24:27,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518796660] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:24:27,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199521582] [2022-01-10 20:24:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:27,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:27,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:24:27,970 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 20:24:27,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 20:24:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:28,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 20:24:28,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:24:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:24:28,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:24:28,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:24:28,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199521582] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:24:28,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:24:28,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 15 [2022-01-10 20:24:28,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065749018] [2022-01-10 20:24:28,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:24:28,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 20:24:28,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:24:28,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 20:24:28,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-01-10 20:24:28,224 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:28,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:24:28,766 INFO L93 Difference]: Finished difference Result 133 states and 180 transitions. [2022-01-10 20:24:28,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-10 20:24:28,767 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-10 20:24:28,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:24:28,768 INFO L225 Difference]: With dead ends: 133 [2022-01-10 20:24:28,768 INFO L226 Difference]: Without dead ends: 131 [2022-01-10 20:24:28,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=594, Unknown=0, NotChecked=0, Total=812 [2022-01-10 20:24:28,770 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 144 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 20:24:28,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 37 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 20:24:28,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-10 20:24:28,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 45. [2022-01-10 20:24:28,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:28,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 60 transitions. [2022-01-10 20:24:28,781 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 60 transitions. Word has length 12 [2022-01-10 20:24:28,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:24:28,781 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 60 transitions. [2022-01-10 20:24:28,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:28,781 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 60 transitions. [2022-01-10 20:24:28,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-10 20:24:28,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:24:28,782 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:24:28,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 20:24:29,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:29,003 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:24:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:24:29,004 INFO L85 PathProgramCache]: Analyzing trace with hash -671214993, now seen corresponding path program 1 times [2022-01-10 20:24:29,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:24:29,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214644083] [2022-01-10 20:24:29,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:29,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:24:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 20:24:29,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:24:29,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214644083] [2022-01-10 20:24:29,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214644083] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:24:29,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:24:29,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 20:24:29,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743687629] [2022-01-10 20:24:29,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:24:29,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 20:24:29,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:24:29,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 20:24:29,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 20:24:29,051 INFO L87 Difference]: Start difference. First operand 45 states and 60 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:29,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:24:29,113 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2022-01-10 20:24:29,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 20:24:29,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-10 20:24:29,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:24:29,114 INFO L225 Difference]: With dead ends: 67 [2022-01-10 20:24:29,114 INFO L226 Difference]: Without dead ends: 47 [2022-01-10 20:24:29,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 20:24:29,115 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:24:29,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 9 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:24:29,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-10 20:24:29,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-01-10 20:24:29,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 46 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:29,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2022-01-10 20:24:29,125 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 21 [2022-01-10 20:24:29,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:24:29,125 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2022-01-10 20:24:29,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:29,125 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2022-01-10 20:24:29,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 20:24:29,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:24:29,126 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:24:29,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 20:24:29,126 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:24:29,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:24:29,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1663675371, now seen corresponding path program 1 times [2022-01-10 20:24:29,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:24:29,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538360504] [2022-01-10 20:24:29,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:29,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:24:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 20:24:29,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:24:29,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538360504] [2022-01-10 20:24:29,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538360504] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:24:29,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:24:29,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 20:24:29,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104952456] [2022-01-10 20:24:29,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:24:29,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 20:24:29,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:24:29,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 20:24:29,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 20:24:29,194 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:29,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:24:29,275 INFO L93 Difference]: Finished difference Result 126 states and 169 transitions. [2022-01-10 20:24:29,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 20:24:29,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-10 20:24:29,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:24:29,277 INFO L225 Difference]: With dead ends: 126 [2022-01-10 20:24:29,277 INFO L226 Difference]: Without dead ends: 83 [2022-01-10 20:24:29,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 20:24:29,283 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 51 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:24:29,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 13 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:24:29,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-10 20:24:29,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2022-01-10 20:24:29,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 48 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:29,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2022-01-10 20:24:29,303 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 24 [2022-01-10 20:24:29,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:24:29,303 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2022-01-10 20:24:29,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:29,303 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2022-01-10 20:24:29,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 20:24:29,304 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:24:29,304 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:24:29,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 20:24:29,305 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:24:29,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:24:29,305 INFO L85 PathProgramCache]: Analyzing trace with hash 2059795416, now seen corresponding path program 1 times [2022-01-10 20:24:29,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:24:29,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291758675] [2022-01-10 20:24:29,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:29,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:24:29,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 20:24:29,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:24:29,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291758675] [2022-01-10 20:24:29,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291758675] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:24:29,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428734900] [2022-01-10 20:24:29,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:29,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:29,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:24:29,562 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 20:24:29,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 20:24:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:29,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 20:24:29,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:24:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 20:24:29,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:24:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 20:24:29,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428734900] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:24:29,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:24:29,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2022-01-10 20:24:29,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341652560] [2022-01-10 20:24:29,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:24:29,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 20:24:29,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:24:29,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 20:24:29,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-01-10 20:24:29,822 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:31,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:24:31,876 INFO L93 Difference]: Finished difference Result 297 states and 395 transitions. [2022-01-10 20:24:31,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-10 20:24:31,876 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-10 20:24:31,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:24:31,880 INFO L225 Difference]: With dead ends: 297 [2022-01-10 20:24:31,880 INFO L226 Difference]: Without dead ends: 172 [2022-01-10 20:24:31,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2012 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1053, Invalid=4497, Unknown=0, NotChecked=0, Total=5550 [2022-01-10 20:24:31,886 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 564 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 20:24:31,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 30 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 20:24:31,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-01-10 20:24:31,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 81. [2022-01-10 20:24:31,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.25) internal successors, (100), 80 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:31,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2022-01-10 20:24:31,919 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 24 [2022-01-10 20:24:31,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:24:31,930 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2022-01-10 20:24:31,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:31,930 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2022-01-10 20:24:31,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-10 20:24:31,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:24:31,931 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:24:31,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 20:24:32,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:32,132 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:24:32,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:24:32,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1862811484, now seen corresponding path program 1 times [2022-01-10 20:24:32,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:24:32,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88168508] [2022-01-10 20:24:32,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:32,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:24:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-10 20:24:32,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:24:32,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88168508] [2022-01-10 20:24:32,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88168508] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:24:32,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932300047] [2022-01-10 20:24:32,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:32,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:32,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:24:32,396 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 20:24:32,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 20:24:32,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:32,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 20:24:32,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:24:32,751 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 20:24:32,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:24:32,996 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 20:24:32,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932300047] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:24:32,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:24:32,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 11 [2022-01-10 20:24:32,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777638639] [2022-01-10 20:24:32,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:24:32,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 20:24:32,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:24:32,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 20:24:32,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-01-10 20:24:32,998 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:33,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:24:33,232 INFO L93 Difference]: Finished difference Result 171 states and 212 transitions. [2022-01-10 20:24:33,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 20:24:33,232 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-10 20:24:33,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:24:33,233 INFO L225 Difference]: With dead ends: 171 [2022-01-10 20:24:33,233 INFO L226 Difference]: Without dead ends: 169 [2022-01-10 20:24:33,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2022-01-10 20:24:33,235 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 95 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 20:24:33,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 23 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 20:24:33,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-01-10 20:24:33,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 68. [2022-01-10 20:24:33,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 67 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:33,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2022-01-10 20:24:33,257 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 39 [2022-01-10 20:24:33,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:24:33,257 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2022-01-10 20:24:33,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:33,257 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2022-01-10 20:24:33,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 20:24:33,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:24:33,258 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:24:33,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 20:24:33,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:33,471 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:24:33,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:24:33,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1032015181, now seen corresponding path program 2 times [2022-01-10 20:24:33,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:24:33,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897106120] [2022-01-10 20:24:33,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:33,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:24:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-01-10 20:24:33,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:24:33,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897106120] [2022-01-10 20:24:33,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897106120] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:24:33,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882374781] [2022-01-10 20:24:33,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 20:24:33,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:33,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:24:33,825 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 20:24:33,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 20:24:33,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 20:24:33,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:24:33,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 20:24:33,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:24:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-01-10 20:24:34,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 20:24:34,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882374781] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:24:34,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 20:24:34,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2022-01-10 20:24:34,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276137272] [2022-01-10 20:24:34,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:24:34,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 20:24:34,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:24:34,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 20:24:34,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-01-10 20:24:34,052 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:34,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:24:34,108 INFO L93 Difference]: Finished difference Result 127 states and 153 transitions. [2022-01-10 20:24:34,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 20:24:34,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-10 20:24:34,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:24:34,110 INFO L225 Difference]: With dead ends: 127 [2022-01-10 20:24:34,110 INFO L226 Difference]: Without dead ends: 125 [2022-01-10 20:24:34,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-01-10 20:24:34,111 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:24:34,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:24:34,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-10 20:24:34,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 87. [2022-01-10 20:24:34,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.2209302325581395) internal successors, (105), 86 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:34,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 105 transitions. [2022-01-10 20:24:34,132 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 105 transitions. Word has length 51 [2022-01-10 20:24:34,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:24:34,132 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 105 transitions. [2022-01-10 20:24:34,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:34,132 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 105 transitions. [2022-01-10 20:24:34,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 20:24:34,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:24:34,133 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-01-10 20:24:34,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 20:24:34,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:34,351 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:24:34,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:24:34,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1673015106, now seen corresponding path program 3 times [2022-01-10 20:24:34,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:24:34,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274223475] [2022-01-10 20:24:34,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:34,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:24:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-01-10 20:24:34,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:24:34,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274223475] [2022-01-10 20:24:34,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274223475] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:24:34,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298683541] [2022-01-10 20:24:34,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 20:24:34,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:34,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:24:34,452 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 20:24:34,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 20:24:34,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 20:24:34,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:24:34,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 20:24:34,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:24:34,819 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-01-10 20:24:34,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:24:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-01-10 20:24:34,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298683541] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:24:34,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:24:34,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-01-10 20:24:34,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248045230] [2022-01-10 20:24:34,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:24:34,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 20:24:34,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:24:34,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 20:24:34,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-10 20:24:34,949 INFO L87 Difference]: Start difference. First operand 87 states and 105 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:35,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:24:35,101 INFO L93 Difference]: Finished difference Result 270 states and 329 transitions. [2022-01-10 20:24:35,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 20:24:35,101 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-01-10 20:24:35,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:24:35,102 INFO L225 Difference]: With dead ends: 270 [2022-01-10 20:24:35,102 INFO L226 Difference]: Without dead ends: 268 [2022-01-10 20:24:35,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-01-10 20:24:35,103 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 20:24:35,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 39 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 20:24:35,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-01-10 20:24:35,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 159. [2022-01-10 20:24:35,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.2151898734177216) internal successors, (192), 158 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:35,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 192 transitions. [2022-01-10 20:24:35,130 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 192 transitions. Word has length 66 [2022-01-10 20:24:35,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:24:35,130 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 192 transitions. [2022-01-10 20:24:35,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:35,131 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 192 transitions. [2022-01-10 20:24:35,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-10 20:24:35,132 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:24:35,132 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 8, 7, 7, 7, 6, 6, 6, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2022-01-10 20:24:35,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-10 20:24:35,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:35,355 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:24:35,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:24:35,355 INFO L85 PathProgramCache]: Analyzing trace with hash -62617545, now seen corresponding path program 4 times [2022-01-10 20:24:35,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:24:35,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629048489] [2022-01-10 20:24:35,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:35,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:24:35,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 0 proven. 434 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-01-10 20:24:35,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:24:35,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629048489] [2022-01-10 20:24:35,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629048489] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:24:35,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733368245] [2022-01-10 20:24:35,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 20:24:35,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:35,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:24:35,517 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 20:24:35,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 20:24:35,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 20:24:35,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:24:35,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 20:24:35,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:24:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2022-01-10 20:24:35,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:24:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2022-01-10 20:24:36,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733368245] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:24:36,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:24:36,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-01-10 20:24:36,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925467950] [2022-01-10 20:24:36,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:24:36,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 20:24:36,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:24:36,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 20:24:36,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-01-10 20:24:36,163 INFO L87 Difference]: Start difference. First operand 159 states and 192 transitions. Second operand has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:36,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:24:36,449 INFO L93 Difference]: Finished difference Result 496 states and 603 transitions. [2022-01-10 20:24:36,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 20:24:36,449 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-01-10 20:24:36,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:24:36,451 INFO L225 Difference]: With dead ends: 496 [2022-01-10 20:24:36,451 INFO L226 Difference]: Without dead ends: 362 [2022-01-10 20:24:36,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-01-10 20:24:36,452 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 127 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 20:24:36,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 51 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 20:24:36,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-10 20:24:36,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 264. [2022-01-10 20:24:36,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.2053231939163498) internal successors, (317), 263 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:36,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 317 transitions. [2022-01-10 20:24:36,511 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 317 transitions. Word has length 120 [2022-01-10 20:24:36,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:24:36,511 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 317 transitions. [2022-01-10 20:24:36,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:36,511 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 317 transitions. [2022-01-10 20:24:36,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-10 20:24:36,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:24:36,513 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 13, 12, 12, 12, 11, 11, 11, 10, 10, 5, 4, 4, 1, 1, 1, 1] [2022-01-10 20:24:36,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-10 20:24:36,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:36,729 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:24:36,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:24:36,730 INFO L85 PathProgramCache]: Analyzing trace with hash -863767162, now seen corresponding path program 5 times [2022-01-10 20:24:36,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:24:36,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576476139] [2022-01-10 20:24:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:36,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:24:36,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 250 proven. 395 refuted. 0 times theorem prover too weak. 1477 trivial. 0 not checked. [2022-01-10 20:24:37,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:24:37,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576476139] [2022-01-10 20:24:37,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576476139] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:24:37,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592439560] [2022-01-10 20:24:37,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 20:24:37,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:37,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:24:37,057 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) [2022-01-10 20:24:37,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-10 20:24:37,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-10 20:24:37,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:24:37,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 20:24:37,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:24:37,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 782 proven. 14 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2022-01-10 20:24:37,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:24:37,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 782 proven. 14 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2022-01-10 20:24:37,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592439560] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:24:37,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:24:37,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 15 [2022-01-10 20:24:37,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562119998] [2022-01-10 20:24:37,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:24:37,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 20:24:37,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:24:37,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 20:24:37,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-01-10 20:24:37,824 INFO L87 Difference]: Start difference. First operand 264 states and 317 transitions. Second operand has 15 states, 15 states have (on average 6.866666666666666) internal successors, (103), 15 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:38,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:24:38,327 INFO L93 Difference]: Finished difference Result 1353 states and 1667 transitions. [2022-01-10 20:24:38,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 20:24:38,327 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.866666666666666) internal successors, (103), 15 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2022-01-10 20:24:38,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:24:38,330 INFO L225 Difference]: With dead ends: 1353 [2022-01-10 20:24:38,330 INFO L226 Difference]: Without dead ends: 1094 [2022-01-10 20:24:38,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 380 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2022-01-10 20:24:38,331 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 59 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 20:24:38,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 33 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 20:24:38,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-01-10 20:24:38,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 581. [2022-01-10 20:24:38,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 1.1913793103448276) internal successors, (691), 580 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:38,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 691 transitions. [2022-01-10 20:24:38,429 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 691 transitions. Word has length 195 [2022-01-10 20:24:38,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:24:38,429 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 691 transitions. [2022-01-10 20:24:38,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.866666666666666) internal successors, (103), 15 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:38,430 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 691 transitions. [2022-01-10 20:24:38,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2022-01-10 20:24:38,457 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:24:38,457 INFO L514 BasicCegarLoop]: trace histogram [72, 71, 71, 47, 46, 46, 23, 22, 22, 11, 10, 10, 5, 4, 4, 1, 1, 1, 1] [2022-01-10 20:24:38,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-10 20:24:38,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:38,669 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:24:38,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:24:38,670 INFO L85 PathProgramCache]: Analyzing trace with hash 674713646, now seen corresponding path program 6 times [2022-01-10 20:24:38,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:24:38,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223647641] [2022-01-10 20:24:38,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:38,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:24:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16250 backedges. 0 proven. 444 refuted. 0 times theorem prover too weak. 15806 trivial. 0 not checked. [2022-01-10 20:24:39,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:24:39,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223647641] [2022-01-10 20:24:39,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223647641] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:24:39,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789424365] [2022-01-10 20:24:39,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 20:24:39,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:39,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:24:39,352 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 20:24:39,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-10 20:24:39,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-10 20:24:39,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:24:39,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 20:24:39,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:24:40,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16250 backedges. 442 proven. 2 refuted. 0 times theorem prover too weak. 15806 trivial. 0 not checked. [2022-01-10 20:24:40,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:24:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16250 backedges. 0 proven. 444 refuted. 0 times theorem prover too weak. 15806 trivial. 0 not checked. [2022-01-10 20:24:40,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789424365] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:24:40,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:24:40,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-01-10 20:24:40,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968387269] [2022-01-10 20:24:40,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:24:40,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 20:24:40,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:24:40,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 20:24:40,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-10 20:24:40,788 INFO L87 Difference]: Start difference. First operand 581 states and 691 transitions. Second operand has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:41,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:24:41,002 INFO L93 Difference]: Finished difference Result 1470 states and 1783 transitions. [2022-01-10 20:24:41,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 20:24:41,003 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 468 [2022-01-10 20:24:41,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:24:41,005 INFO L225 Difference]: With dead ends: 1470 [2022-01-10 20:24:41,005 INFO L226 Difference]: Without dead ends: 913 [2022-01-10 20:24:41,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 943 GetRequests, 931 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-01-10 20:24:41,006 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 35 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:24:41,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 16 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:24:41,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-01-10 20:24:41,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 544. [2022-01-10 20:24:41,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 1.16390423572744) internal successors, (632), 543 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:41,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 632 transitions. [2022-01-10 20:24:41,102 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 632 transitions. Word has length 468 [2022-01-10 20:24:41,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:24:41,103 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 632 transitions. [2022-01-10 20:24:41,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:41,103 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 632 transitions. [2022-01-10 20:24:41,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2022-01-10 20:24:41,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:24:41,108 INFO L514 BasicCegarLoop]: trace histogram [97, 96, 96, 47, 46, 46, 23, 22, 22, 11, 10, 10, 5, 4, 4, 1, 1, 1, 1] [2022-01-10 20:24:41,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-10 20:24:41,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-10 20:24:41,325 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:24:41,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:24:41,325 INFO L85 PathProgramCache]: Analyzing trace with hash 224496568, now seen corresponding path program 7 times [2022-01-10 20:24:41,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:24:41,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917197676] [2022-01-10 20:24:41,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:41,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:24:41,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 23675 backedges. 258 proven. 757 refuted. 0 times theorem prover too weak. 22660 trivial. 0 not checked. [2022-01-10 20:24:42,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:24:42,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917197676] [2022-01-10 20:24:42,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917197676] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:24:42,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526253416] [2022-01-10 20:24:42,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 20:24:42,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:42,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:24:42,008 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 20:24:42,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-10 20:24:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:42,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 4053 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 20:24:42,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:24:43,474 INFO L134 CoverageAnalysis]: Checked inductivity of 23675 backedges. 10706 proven. 1799 refuted. 0 times theorem prover too weak. 11170 trivial. 0 not checked. [2022-01-10 20:24:43,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:24:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 23675 backedges. 10700 proven. 1804 refuted. 0 times theorem prover too weak. 11171 trivial. 0 not checked. [2022-01-10 20:24:44,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526253416] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:24:44,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:24:44,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 23 [2022-01-10 20:24:44,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543277937] [2022-01-10 20:24:44,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:24:44,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 20:24:44,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:24:44,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 20:24:44,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-01-10 20:24:44,304 INFO L87 Difference]: Start difference. First operand 544 states and 632 transitions. Second operand has 23 states, 23 states have (on average 6.913043478260869) internal successors, (159), 23 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:49,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:24:49,870 INFO L93 Difference]: Finished difference Result 2931 states and 3448 transitions. [2022-01-10 20:24:49,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-10 20:24:49,870 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.913043478260869) internal successors, (159), 23 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 543 [2022-01-10 20:24:49,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:24:49,875 INFO L225 Difference]: With dead ends: 2931 [2022-01-10 20:24:49,876 INFO L226 Difference]: Without dead ends: 1930 [2022-01-10 20:24:49,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1176 GetRequests, 1072 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3816 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1965, Invalid=9165, Unknown=0, NotChecked=0, Total=11130 [2022-01-10 20:24:49,878 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 473 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 20:24:49,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 93 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 20:24:49,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2022-01-10 20:24:50,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1429. [2022-01-10 20:24:50,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 1.1295518207282913) internal successors, (1613), 1428 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:50,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 1613 transitions. [2022-01-10 20:24:50,259 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 1613 transitions. Word has length 543 [2022-01-10 20:24:50,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:24:50,259 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 1613 transitions. [2022-01-10 20:24:50,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.913043478260869) internal successors, (159), 23 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:50,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 1613 transitions. [2022-01-10 20:24:50,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2022-01-10 20:24:50,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:24:50,263 INFO L514 BasicCegarLoop]: trace histogram [179, 178, 178, 59, 58, 58, 23, 22, 22, 11, 10, 10, 5, 4, 4, 1, 1, 1, 1] [2022-01-10 20:24:50,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-10 20:24:50,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:50,499 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:24:50,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:24:50,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1386691606, now seen corresponding path program 8 times [2022-01-10 20:24:50,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:24:50,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978037836] [2022-01-10 20:24:50,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:50,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:24:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 65468 backedges. 48 proven. 12381 refuted. 0 times theorem prover too weak. 53039 trivial. 0 not checked. [2022-01-10 20:24:52,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:24:52,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978037836] [2022-01-10 20:24:52,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978037836] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:24:52,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333431830] [2022-01-10 20:24:52,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 20:24:52,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:52,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:24:52,928 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 20:24:52,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-10 20:24:53,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 20:24:53,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:24:53,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 6261 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 20:24:53,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:24:55,040 INFO L134 CoverageAnalysis]: Checked inductivity of 65468 backedges. 11988 proven. 395 refuted. 0 times theorem prover too weak. 53085 trivial. 0 not checked. [2022-01-10 20:24:55,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:24:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 65468 backedges. 11934 proven. 445 refuted. 0 times theorem prover too weak. 53089 trivial. 0 not checked. [2022-01-10 20:24:56,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333431830] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:24:56,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:24:56,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-01-10 20:24:56,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057802199] [2022-01-10 20:24:56,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:24:56,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 20:24:56,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:24:56,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 20:24:56,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-01-10 20:24:56,195 INFO L87 Difference]: Start difference. First operand 1429 states and 1613 transitions. Second operand has 22 states, 22 states have (on average 5.7727272727272725) internal successors, (127), 22 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:24:59,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:24:59,091 INFO L93 Difference]: Finished difference Result 5664 states and 6457 transitions. [2022-01-10 20:24:59,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-10 20:24:59,105 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.7727272727272725) internal successors, (127), 22 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 825 [2022-01-10 20:24:59,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:24:59,132 INFO L225 Difference]: With dead ends: 5664 [2022-01-10 20:24:59,132 INFO L226 Difference]: Without dead ends: 4251 [2022-01-10 20:24:59,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1684 GetRequests, 1638 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2022-01-10 20:24:59,136 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 228 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 20:24:59,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 70 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 20:24:59,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2022-01-10 20:25:00,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 4057. [2022-01-10 20:25:00,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4057 states, 4056 states have (on average 1.1148915187376727) internal successors, (4522), 4056 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:25:00,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4057 states to 4057 states and 4522 transitions. [2022-01-10 20:25:00,270 INFO L78 Accepts]: Start accepts. Automaton has 4057 states and 4522 transitions. Word has length 825 [2022-01-10 20:25:00,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:25:00,270 INFO L470 AbstractCegarLoop]: Abstraction has 4057 states and 4522 transitions. [2022-01-10 20:25:00,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.7727272727272725) internal successors, (127), 22 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:25:00,270 INFO L276 IsEmpty]: Start isEmpty. Operand 4057 states and 4522 transitions. [2022-01-10 20:25:00,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2359 [2022-01-10 20:25:00,294 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:25:00,295 INFO L514 BasicCegarLoop]: trace histogram [537, 536, 536, 169, 168, 168, 66, 65, 65, 11, 10, 10, 5, 4, 4, 1, 1, 1, 1] [2022-01-10 20:25:00,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-10 20:25:00,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-10 20:25:00,516 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:25:00,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:25:00,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1896317436, now seen corresponding path program 9 times [2022-01-10 20:25:00,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:25:00,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073502481] [2022-01-10 20:25:00,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:25:00,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:25:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:25:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 581841 backedges. 16 proven. 208338 refuted. 0 times theorem prover too weak. 373487 trivial. 0 not checked. [2022-01-10 20:25:13,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:25:13,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073502481] [2022-01-10 20:25:13,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073502481] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:25:13,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341067770] [2022-01-10 20:25:13,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 20:25:13,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:25:13,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:25:13,366 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 20:25:13,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-10 20:25:13,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-10 20:25:13,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:25:13,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-10 20:25:13,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:25:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 581841 backedges. 205252 proven. 27 refuted. 0 times theorem prover too weak. 376562 trivial. 0 not checked. [2022-01-10 20:25:18,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:25:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 581841 backedges. 0 proven. 205279 refuted. 0 times theorem prover too weak. 376562 trivial. 0 not checked. [2022-01-10 20:25:26,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341067770] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:25:26,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:25:26,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 20] total 38 [2022-01-10 20:25:26,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396132243] [2022-01-10 20:25:26,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:25:26,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-10 20:25:26,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:25:26,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-10 20:25:26,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1025, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 20:25:26,200 INFO L87 Difference]: Start difference. First operand 4057 states and 4522 transitions. Second operand has 38 states, 38 states have (on average 4.315789473684211) internal successors, (164), 38 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)