/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/float-benchs/zonotope_3.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 23:28:27,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 23:28:27,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 23:28:27,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 23:28:27,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 23:28:27,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 23:28:27,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 23:28:27,424 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 23:28:27,428 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 23:28:27,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 23:28:27,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 23:28:27,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 23:28:27,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 23:28:27,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 23:28:27,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 23:28:27,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 23:28:27,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 23:28:27,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 23:28:27,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 23:28:27,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 23:28:27,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 23:28:27,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 23:28:27,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 23:28:27,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 23:28:27,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 23:28:27,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 23:28:27,449 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 23:28:27,449 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 23:28:27,450 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 23:28:27,450 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 23:28:27,451 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 23:28:27,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 23:28:27,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 23:28:27,452 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 23:28:27,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 23:28:27,453 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 23:28:27,454 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 23:28:27,454 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 23:28:27,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 23:28:27,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 23:28:27,455 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 23:28:27,459 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 23:28:27,489 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 23:28:27,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 23:28:27,489 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 23:28:27,489 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 23:28:27,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 23:28:27,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 23:28:27,490 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 23:28:27,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 23:28:27,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 23:28:27,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 23:28:27,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 23:28:27,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 23:28:27,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 23:28:27,500 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 23:28:27,501 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 23:28:27,501 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 23:28:27,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 23:28:27,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 23:28:27,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 23:28:27,501 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 23:28:27,501 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 23:28:27,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 23:28:27,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 23:28:27,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 23:28:27,502 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 23:28:27,502 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 23:28:27,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 23:28:27,503 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 23:28:27,503 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 23:28:27,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 23:28:27,503 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 23:28:27,503 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 23:28:27,505 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 23:28:27,505 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 23:28:27,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 23:28:27,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 23:28:27,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 23:28:27,728 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 23:28:27,729 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 23:28:27,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/zonotope_3.c.v+lhb-reducer.c [2022-01-10 23:28:27,787 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23f5c29ad/030fb677a1564c429b223bc5d0cdecc3/FLAG86abf88ea [2022-01-10 23:28:28,121 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 23:28:28,122 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/zonotope_3.c.v+lhb-reducer.c [2022-01-10 23:28:28,135 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23f5c29ad/030fb677a1564c429b223bc5d0cdecc3/FLAG86abf88ea [2022-01-10 23:28:28,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23f5c29ad/030fb677a1564c429b223bc5d0cdecc3 [2022-01-10 23:28:28,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 23:28:28,546 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 23:28:28,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 23:28:28,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 23:28:28,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 23:28:28,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 11:28:28" (1/1) ... [2022-01-10 23:28:28,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e61438d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:28:28, skipping insertion in model container [2022-01-10 23:28:28,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 11:28:28" (1/1) ... [2022-01-10 23:28:28,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 23:28:28,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 23:28:28,782 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/zonotope_3.c.v+lhb-reducer.c[12131,12144] [2022-01-10 23:28:28,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 23:28:28,808 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 23:28:28,868 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/zonotope_3.c.v+lhb-reducer.c[12131,12144] [2022-01-10 23:28:28,876 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 23:28:28,894 INFO L208 MainTranslator]: Completed translation [2022-01-10 23:28:28,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:28:28 WrapperNode [2022-01-10 23:28:28,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 23:28:28,896 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 23:28:28,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 23:28:28,896 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 23:28:28,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:28:28" (1/1) ... [2022-01-10 23:28:28,923 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:28:28" (1/1) ... [2022-01-10 23:28:28,950 INFO L137 Inliner]: procedures = 17, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 549 [2022-01-10 23:28:28,951 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 23:28:28,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 23:28:28,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 23:28:28,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 23:28:28,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:28:28" (1/1) ... [2022-01-10 23:28:28,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:28:28" (1/1) ... [2022-01-10 23:28:28,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:28:28" (1/1) ... [2022-01-10 23:28:28,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:28:28" (1/1) ... [2022-01-10 23:28:28,977 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:28:28" (1/1) ... [2022-01-10 23:28:28,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:28:28" (1/1) ... [2022-01-10 23:28:28,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:28:28" (1/1) ... [2022-01-10 23:28:28,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 23:28:28,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 23:28:28,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 23:28:28,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 23:28:28,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:28:28" (1/1) ... [2022-01-10 23:28:29,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 23:28:29,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 23:28:29,040 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 23:28:29,063 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 23:28:29,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 23:28:29,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 23:28:29,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 23:28:29,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 23:28:29,211 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 23:28:29,213 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 23:28:29,506 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 23:28:29,512 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 23:28:29,512 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 23:28:29,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:28:29 BoogieIcfgContainer [2022-01-10 23:28:29,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 23:28:29,516 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 23:28:29,516 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 23:28:29,517 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 23:28:29,520 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:28:29" (1/1) ... [2022-01-10 23:28:29,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 11:28:29 BasicIcfg [2022-01-10 23:28:29,655 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 23:28:29,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 23:28:29,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 23:28:29,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 23:28:29,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 11:28:28" (1/4) ... [2022-01-10 23:28:29,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b1fccf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 11:28:29, skipping insertion in model container [2022-01-10 23:28:29,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:28:28" (2/4) ... [2022-01-10 23:28:29,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b1fccf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 11:28:29, skipping insertion in model container [2022-01-10 23:28:29,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:28:29" (3/4) ... [2022-01-10 23:28:29,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b1fccf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 11:28:29, skipping insertion in model container [2022-01-10 23:28:29,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 11:28:29" (4/4) ... [2022-01-10 23:28:29,663 INFO L111 eAbstractionObserver]: Analyzing ICFG zonotope_3.c.v+lhb-reducer.cTransformedIcfg [2022-01-10 23:28:29,667 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 23:28:29,667 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 23:28:29,703 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 23:28:29,709 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 23:28:29,709 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 23:28:29,720 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 52 states have (on average 1.8461538461538463) internal successors, (96), 53 states have internal predecessors, (96), 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 23:28:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 23:28:29,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:28:29,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:28:29,725 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:28:29,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:28:29,730 INFO L85 PathProgramCache]: Analyzing trace with hash 698975767, now seen corresponding path program 1 times [2022-01-10 23:28:29,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:28:29,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456192174] [2022-01-10 23:28:29,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:28:29,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:28:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:28:30,076 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 23:28:30,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:28:30,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456192174] [2022-01-10 23:28:30,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456192174] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 23:28:30,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 23:28:30,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 23:28:30,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863940369] [2022-01-10 23:28:30,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 23:28:30,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 23:28:30,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:28:30,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 23:28:30,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 23:28:30,114 INFO L87 Difference]: Start difference. First operand has 54 states, 52 states have (on average 1.8461538461538463) internal successors, (96), 53 states have internal predecessors, (96), 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 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 23:28:30,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:28:30,183 INFO L93 Difference]: Finished difference Result 67 states and 107 transitions. [2022-01-10 23:28:30,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 23:28:30,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 45 [2022-01-10 23:28:30,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:28:30,192 INFO L225 Difference]: With dead ends: 67 [2022-01-10 23:28:30,192 INFO L226 Difference]: Without dead ends: 51 [2022-01-10 23:28:30,194 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 23:28:30,198 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 9 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 23:28:30,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 278 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 23:28:30,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-10 23:28:30,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-01-10 23:28:30,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 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 23:28:30,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2022-01-10 23:28:30,234 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 45 [2022-01-10 23:28:30,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:28:30,235 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2022-01-10 23:28:30,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 23:28:30,236 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2022-01-10 23:28:30,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 23:28:30,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:28:30,237 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:28:30,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 23:28:30,238 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:28:30,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:28:30,240 INFO L85 PathProgramCache]: Analyzing trace with hash 699958870, now seen corresponding path program 1 times [2022-01-10 23:28:30,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:28:30,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990018465] [2022-01-10 23:28:30,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:28:30,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:28:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:28:30,650 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 23:28:30,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:28:30,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990018465] [2022-01-10 23:28:30,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990018465] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 23:28:30,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 23:28:30,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-10 23:28:30,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636059181] [2022-01-10 23:28:30,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 23:28:30,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 23:28:30,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:28:30,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 23:28:30,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-01-10 23:28:30,656 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 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 23:28:31,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:28:31,112 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2022-01-10 23:28:31,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 23:28:31,113 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 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 45 [2022-01-10 23:28:31,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:28:31,114 INFO L225 Difference]: With dead ends: 64 [2022-01-10 23:28:31,114 INFO L226 Difference]: Without dead ends: 57 [2022-01-10 23:28:31,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-10 23:28:31,115 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 33 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 23:28:31,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 318 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 23:28:31,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-10 23:28:31,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2022-01-10 23:28:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 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 23:28:31,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2022-01-10 23:28:31,122 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 45 [2022-01-10 23:28:31,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:28:31,122 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2022-01-10 23:28:31,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 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 23:28:31,122 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2022-01-10 23:28:31,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-10 23:28:31,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:28:31,124 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:28:31,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 23:28:31,124 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:28:31,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:28:31,125 INFO L85 PathProgramCache]: Analyzing trace with hash -423598456, now seen corresponding path program 1 times [2022-01-10 23:28:31,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:28:31,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775545184] [2022-01-10 23:28:31,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:28:31,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:28:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:28:31,349 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 23:28:31,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:28:31,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775545184] [2022-01-10 23:28:31,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775545184] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 23:28:31,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004714066] [2022-01-10 23:28:31,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:28:31,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 23:28:31,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 23:28:31,355 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 23:28:31,384 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 23:28:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:28:31,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-10 23:28:31,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 23:28:31,994 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 23:28:31,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 23:28:38,118 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 23:28:38,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004714066] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 23:28:38,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 23:28:38,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-01-10 23:28:38,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132159891] [2022-01-10 23:28:38,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 23:28:38,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-10 23:28:38,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:28:38,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-10 23:28:38,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=825, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 23:28:38,129 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 34 states, 34 states have (on average 3.9411764705882355) internal successors, (134), 34 states have internal predecessors, (134), 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 23:29:19,386 WARN L228 SmtUtils]: Spent 33.21s on a formula simplification that was a NOOP. DAG size: 84 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)