/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 02:20:38,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 02:20:38,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 02:20:38,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 02:20:38,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 02:20:38,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 02:20:38,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 02:20:38,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 02:20:38,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 02:20:38,928 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 02:20:38,929 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 02:20:38,930 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 02:20:38,930 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 02:20:38,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 02:20:38,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 02:20:38,932 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 02:20:38,933 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 02:20:38,933 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 02:20:38,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 02:20:38,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 02:20:38,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 02:20:38,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 02:20:38,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 02:20:38,949 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 02:20:38,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 02:20:38,951 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 02:20:38,951 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 02:20:38,952 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 02:20:38,952 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 02:20:38,953 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 02:20:38,953 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 02:20:38,954 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 02:20:38,954 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 02:20:38,955 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 02:20:38,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 02:20:38,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 02:20:38,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 02:20:38,956 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 02:20:38,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 02:20:38,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 02:20:38,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 02:20:38,965 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 02:20:38,992 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 02:20:38,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 02:20:38,992 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 02:20:38,992 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 02:20:38,993 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 02:20:38,993 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 02:20:38,993 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 02:20:38,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 02:20:38,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 02:20:38,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 02:20:38,994 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 02:20:38,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 02:20:38,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 02:20:38,995 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 02:20:38,995 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 02:20:38,995 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 02:20:38,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 02:20:38,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 02:20:38,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 02:20:38,995 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 02:20:38,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 02:20:38,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 02:20:38,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 02:20:38,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 02:20:38,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 02:20:38,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 02:20:38,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 02:20:38,997 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 02:20:38,998 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 02:20:38,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 02:20:38,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 02:20:38,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 02:20:38,999 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 02:20:38,999 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 02:20:39,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 02:20:39,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 02:20:39,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 02:20:39,220 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 02:20:39,220 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 02:20:39,221 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound50.c [2022-01-11 02:20:39,273 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf75fba50/3408d119e76449d48dd148ac5b9ff33f/FLAGfe334c428 [2022-01-11 02:20:39,630 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 02:20:39,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound50.c [2022-01-11 02:20:39,638 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf75fba50/3408d119e76449d48dd148ac5b9ff33f/FLAGfe334c428 [2022-01-11 02:20:40,024 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf75fba50/3408d119e76449d48dd148ac5b9ff33f [2022-01-11 02:20:40,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 02:20:40,033 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 02:20:40,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 02:20:40,036 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 02:20:40,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 02:20:40,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:20:40" (1/1) ... [2022-01-11 02:20:40,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7be706c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:20:40, skipping insertion in model container [2022-01-11 02:20:40,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:20:40" (1/1) ... [2022-01-11 02:20:40,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 02:20:40,068 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 02:20:40,195 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound50.c[576,589] [2022-01-11 02:20:40,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 02:20:40,246 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 02:20:40,257 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound50.c[576,589] [2022-01-11 02:20:40,277 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 02:20:40,286 INFO L208 MainTranslator]: Completed translation [2022-01-11 02:20:40,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:20:40 WrapperNode [2022-01-11 02:20:40,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 02:20:40,287 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 02:20:40,287 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 02:20:40,287 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 02:20:40,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:20:40" (1/1) ... [2022-01-11 02:20:40,303 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:20:40" (1/1) ... [2022-01-11 02:20:40,326 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 98 [2022-01-11 02:20:40,327 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 02:20:40,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 02:20:40,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 02:20:40,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 02:20:40,335 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:20:40" (1/1) ... [2022-01-11 02:20:40,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:20:40" (1/1) ... [2022-01-11 02:20:40,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:20:40" (1/1) ... [2022-01-11 02:20:40,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:20:40" (1/1) ... [2022-01-11 02:20:40,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:20:40" (1/1) ... [2022-01-11 02:20:40,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:20:40" (1/1) ... [2022-01-11 02:20:40,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:20:40" (1/1) ... [2022-01-11 02:20:40,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 02:20:40,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 02:20:40,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 02:20:40,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 02:20:40,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:20:40" (1/1) ... [2022-01-11 02:20:40,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 02:20:40,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:20:40,384 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-11 02:20:40,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-11 02:20:40,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 02:20:40,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 02:20:40,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 02:20:40,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 02:20:40,473 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 02:20:40,474 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 02:20:41,067 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 02:20:41,071 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 02:20:41,071 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-11 02:20:41,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:20:41 BoogieIcfgContainer [2022-01-11 02:20:41,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 02:20:41,073 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 02:20:41,073 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 02:20:41,077 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 02:20:41,080 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:20:41" (1/1) ... [2022-01-11 02:20:41,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:20:41 BasicIcfg [2022-01-11 02:20:41,258 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 02:20:41,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 02:20:41,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 02:20:41,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 02:20:41,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 02:20:40" (1/4) ... [2022-01-11 02:20:41,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e9415d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:20:41, skipping insertion in model container [2022-01-11 02:20:41,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:20:40" (2/4) ... [2022-01-11 02:20:41,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e9415d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:20:41, skipping insertion in model container [2022-01-11 02:20:41,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:20:41" (3/4) ... [2022-01-11 02:20:41,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e9415d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 02:20:41, skipping insertion in model container [2022-01-11 02:20:41,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:20:41" (4/4) ... [2022-01-11 02:20:41,268 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound50.cTransformedIcfg [2022-01-11 02:20:41,273 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 02:20:41,273 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2022-01-11 02:20:41,307 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 02:20:41,314 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-11 02:20:41,314 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-01-11 02:20:41,328 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 37 states have (on average 1.6216216216216217) 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) [2022-01-11 02:20:41,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 02:20:41,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:20:41,331 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:20:41,332 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-01-11 02:20:41,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:20:41,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1484681195, now seen corresponding path program 1 times [2022-01-11 02:20:41,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:20:41,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157605119] [2022-01-11 02:20:41,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:20:41,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:20:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:20:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:20:41,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:20:41,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157605119] [2022-01-11 02:20:41,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157605119] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:20:41,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:20:41,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 02:20:41,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262234093] [2022-01-11 02:20:41,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:20:41,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-11 02:20:41,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:20:41,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-11 02:20:41,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 02:20:41,508 INFO L87 Difference]: Start difference. First operand has 45 states, 37 states have (on average 1.6216216216216217) 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-01-11 02:20:41,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:20:41,524 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2022-01-11 02:20:41,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-11 02:20:41,526 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2022-01-11 02:20:41,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:20:41,530 INFO L225 Difference]: With dead ends: 87 [2022-01-11 02:20:41,531 INFO L226 Difference]: Without dead ends: 41 [2022-01-11 02:20:41,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 02:20:41,536 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:20:41,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:20:41,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-11 02:20:41,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-01-11 02:20:41,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 40 states have internal predecessors, (42), 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) [2022-01-11 02:20:41,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-01-11 02:20:41,566 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 11 [2022-01-11 02:20:41,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:20:41,566 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-01-11 02:20:41,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-01-11 02:20:41,567 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-01-11 02:20:41,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 02:20:41,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:20:41,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:20:41,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 02:20:41,569 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-01-11 02:20:41,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:20:41,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1891258840, now seen corresponding path program 1 times [2022-01-11 02:20:41,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:20:41,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108991865] [2022-01-11 02:20:41,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:20:41,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:20:41,617 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-11 02:20:41,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1294593243] [2022-01-11 02:20:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:20:41,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:20:41,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:20:41,620 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:20:41,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 02:20:41,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:20:41,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-11 02:20:41,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:20:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:20:41,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-11 02:20:41,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:20:41,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108991865] [2022-01-11 02:20:41,785 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-11 02:20:41,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294593243] [2022-01-11 02:20:41,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294593243] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:20:41,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:20:41,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-11 02:20:41,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585244288] [2022-01-11 02:20:41,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:20:41,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 02:20:41,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:20:41,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 02:20:41,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-11 02:20:41,787 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-01-11 02:20:42,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:20:42,059 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2022-01-11 02:20:42,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 02:20:42,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2022-01-11 02:20:42,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:20:42,061 INFO L225 Difference]: With dead ends: 55 [2022-01-11 02:20:42,061 INFO L226 Difference]: Without dead ends: 53 [2022-01-11 02:20:42,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-11 02:20:42,062 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 22 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 02:20:42,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 89 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-11 02:20:42,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-11 02:20:42,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2022-01-11 02:20:42,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 42 states have internal predecessors, (44), 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) [2022-01-11 02:20:42,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-01-11 02:20:42,067 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 11 [2022-01-11 02:20:42,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:20:42,067 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-01-11 02:20:42,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-01-11 02:20:42,067 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-01-11 02:20:42,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-11 02:20:42,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:20:42,068 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:20:42,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-11 02:20:42,279 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 [2022-01-11 02:20:42,280 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-01-11 02:20:42,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:20:42,280 INFO L85 PathProgramCache]: Analyzing trace with hash 728616028, now seen corresponding path program 1 times [2022-01-11 02:20:42,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:20:42,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032969676] [2022-01-11 02:20:42,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:20:42,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:20:42,297 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-11 02:20:42,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [235365983] [2022-01-11 02:20:42,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:20:42,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:20:42,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:20:42,315 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:20:42,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 02:20:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:20:42,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-11 02:20:42,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:20:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:20:42,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-11 02:20:42,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:20:42,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032969676] [2022-01-11 02:20:42,799 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-11 02:20:42,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235365983] [2022-01-11 02:20:42,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235365983] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:20:42,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:20:42,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-11 02:20:42,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304007410] [2022-01-11 02:20:42,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:20:42,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-11 02:20:42,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:20:42,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-11 02:20:42,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-11 02:20:42,801 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2022-01-11 02:20:43,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:20:43,114 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2022-01-11 02:20:43,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 02:20:43,115 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 13 [2022-01-11 02:20:43,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:20:43,116 INFO L225 Difference]: With dead ends: 72 [2022-01-11 02:20:43,116 INFO L226 Difference]: Without dead ends: 62 [2022-01-11 02:20:43,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-01-11 02:20:43,117 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 135 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 02:20:43,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 67 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 02:20:43,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-11 02:20:43,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2022-01-11 02:20:43,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.22) internal successors, (61), 56 states have internal predecessors, (61), 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) [2022-01-11 02:20:43,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-01-11 02:20:43,125 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 13 [2022-01-11 02:20:43,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:20:43,125 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-01-11 02:20:43,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2022-01-11 02:20:43,125 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-01-11 02:20:43,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-11 02:20:43,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:20:43,126 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:20:43,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 02:20:43,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-11 02:20:43,331 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-01-11 02:20:43,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:20:43,332 INFO L85 PathProgramCache]: Analyzing trace with hash -287664862, now seen corresponding path program 1 times [2022-01-11 02:20:43,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:20:43,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504150704] [2022-01-11 02:20:43,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:20:43,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:20:43,360 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-11 02:20:43,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045617322] [2022-01-11 02:20:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:20:43,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:20:43,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:20:43,376 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:20:43,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 02:20:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:20:43,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-11 02:20:43,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:20:43,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:20:43,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-11 02:20:43,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:20:43,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504150704] [2022-01-11 02:20:43,777 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-11 02:20:43,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045617322] [2022-01-11 02:20:43,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045617322] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:20:43,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:20:43,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-11 02:20:43,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281350863] [2022-01-11 02:20:43,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:20:43,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-11 02:20:43,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:20:43,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-11 02:20:43,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-11 02:20:43,780 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-01-11 02:20:44,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:20:44,088 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2022-01-11 02:20:44,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-11 02:20:44,089 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 17 [2022-01-11 02:20:44,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:20:44,089 INFO L225 Difference]: With dead ends: 100 [2022-01-11 02:20:44,089 INFO L226 Difference]: Without dead ends: 94 [2022-01-11 02:20:44,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-01-11 02:20:44,090 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 124 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 02:20:44,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 69 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 02:20:44,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-11 02:20:44,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 78. [2022-01-11 02:20:44,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 77 states have internal predecessors, (86), 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) [2022-01-11 02:20:44,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2022-01-11 02:20:44,106 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 17 [2022-01-11 02:20:44,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:20:44,106 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2022-01-11 02:20:44,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-01-11 02:20:44,107 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2022-01-11 02:20:44,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-11 02:20:44,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:20:44,108 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] [2022-01-11 02:20:44,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-11 02:20:44,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:20:44,315 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-01-11 02:20:44,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:20:44,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1361271542, now seen corresponding path program 1 times [2022-01-11 02:20:44,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:20:44,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129128214] [2022-01-11 02:20:44,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:20:44,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:20:44,361 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-11 02:20:44,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121303807] [2022-01-11 02:20:44,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:20:44,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:20:44,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:20:44,363 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:20:44,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 02:20:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:20:44,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-11 02:20:44,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:20:44,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:20:44,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:20:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:20:52,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:20:52,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129128214] [2022-01-11 02:20:52,347 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-11 02:20:52,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121303807] [2022-01-11 02:20:52,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121303807] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:20:52,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-11 02:20:52,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 10 [2022-01-11 02:20:52,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38597756] [2022-01-11 02:20:52,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-11 02:20:52,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-11 02:20:52,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:20:52,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-11 02:20:52,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=61, Unknown=2, NotChecked=0, Total=90 [2022-01-11 02:20:52,349 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 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) [2022-01-11 02:21:04,120 WARN L228 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 44 DAG size of output: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-11 02:21:07,079 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-11 02:21:15,129 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-11 02:21:17,136 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-11 02:21:19,144 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-11 02:21:25,184 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-11 02:21:27,189 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-11 02:21:29,198 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-11 02:21:31,203 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-11 02:21:33,208 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-11 02:21:35,219 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-11 02:21:37,227 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-11 02:21:39,249 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-11 02:21:41,260 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-11 02:21:43,267 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-11 02:21:45,271 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-11 02:21:47,278 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-11 02:21:49,310 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-11 02:21:51,421 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-11 02:21:53,449 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-11 02:21:55,458 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-11 02:21:57,464 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-11 02:21:59,704 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []