./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5b36d44f Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9885703216edf9cfe4bfb438db591a48e102e73a3e0423f90ce871c05fdf2b57 --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5b36d44 [2021-11-07 20:53:04,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 20:53:04,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 20:53:04,951 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 20:53:04,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 20:53:04,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 20:53:04,960 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 20:53:04,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 20:53:04,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 20:53:04,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 20:53:04,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 20:53:04,964 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 20:53:04,964 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 20:53:04,965 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 20:53:04,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 20:53:04,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 20:53:04,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 20:53:04,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 20:53:04,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 20:53:04,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 20:53:04,971 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 20:53:04,971 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 20:53:04,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 20:53:04,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 20:53:04,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 20:53:04,974 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 20:53:04,975 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 20:53:04,975 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 20:53:04,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 20:53:04,976 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 20:53:04,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 20:53:04,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 20:53:04,977 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 20:53:04,978 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 20:53:04,978 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 20:53:04,979 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 20:53:04,979 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 20:53:04,979 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 20:53:04,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 20:53:04,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 20:53:04,980 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 20:53:04,981 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 20:53:04,994 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 20:53:04,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 20:53:04,995 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 20:53:04,995 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 20:53:04,996 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 20:53:04,996 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 20:53:04,996 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 20:53:04,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 20:53:04,996 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 20:53:04,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 20:53:04,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 20:53:04,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 20:53:04,997 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 20:53:04,997 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 20:53:04,997 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 20:53:04,997 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 20:53:04,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 20:53:04,998 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 20:53:04,998 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 20:53:04,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 20:53:04,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 20:53:04,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 20:53:04,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 20:53:04,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 20:53:04,999 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 20:53:04,999 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 20:53:04,999 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 20:53:04,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 20:53:04,999 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 20:53:04,999 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 20:53:05,000 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 20:53:05,000 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 20:53:05,000 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9885703216edf9cfe4bfb438db591a48e102e73a3e0423f90ce871c05fdf2b57 [2021-11-07 20:53:05,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 20:53:05,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 20:53:05,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 20:53:05,143 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 20:53:05,143 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 20:53:05,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i [2021-11-07 20:53:05,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ad0de076/65a6f37e4bb6439ab097a1eb6075754c/FLAGf11f9e599 [2021-11-07 20:53:05,629 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 20:53:05,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i [2021-11-07 20:53:05,654 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ad0de076/65a6f37e4bb6439ab097a1eb6075754c/FLAGf11f9e599 [2021-11-07 20:53:05,965 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ad0de076/65a6f37e4bb6439ab097a1eb6075754c [2021-11-07 20:53:05,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 20:53:05,969 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 20:53:05,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 20:53:05,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 20:53:05,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 20:53:05,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:53:05" (1/1) ... [2021-11-07 20:53:05,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d6e57ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:05, skipping insertion in model container [2021-11-07 20:53:05,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:53:05" (1/1) ... [2021-11-07 20:53:05,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 20:53:06,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 20:53:06,324 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i[33022,33035] [2021-11-07 20:53:06,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 20:53:06,540 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 20:53:06,555 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i[33022,33035] [2021-11-07 20:53:06,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 20:53:06,651 INFO L208 MainTranslator]: Completed translation [2021-11-07 20:53:06,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:06 WrapperNode [2021-11-07 20:53:06,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 20:53:06,653 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 20:53:06,653 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 20:53:06,653 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 20:53:06,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:06" (1/1) ... [2021-11-07 20:53:06,689 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:06" (1/1) ... [2021-11-07 20:53:06,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 20:53:06,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 20:53:06,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 20:53:06,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 20:53:06,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:06" (1/1) ... [2021-11-07 20:53:06,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:06" (1/1) ... [2021-11-07 20:53:06,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:06" (1/1) ... [2021-11-07 20:53:06,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:06" (1/1) ... [2021-11-07 20:53:06,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:06" (1/1) ... [2021-11-07 20:53:06,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:06" (1/1) ... [2021-11-07 20:53:06,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:06" (1/1) ... [2021-11-07 20:53:06,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 20:53:06,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 20:53:06,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 20:53:06,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 20:53:06,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:06" (1/1) ... [2021-11-07 20:53:06,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 20:53:06,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 20:53:06,965 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) [2021-11-07 20:53:06,982 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 [2021-11-07 20:53:06,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 20:53:06,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 20:53:06,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 20:53:06,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 20:53:06,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 20:53:06,996 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-07 20:53:06,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 20:53:06,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 20:53:06,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 20:53:06,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 20:53:06,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 20:53:08,324 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 20:53:08,324 INFO L299 CfgBuilder]: Removed 207 assume(true) statements. [2021-11-07 20:53:08,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:53:08 BoogieIcfgContainer [2021-11-07 20:53:08,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 20:53:08,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 20:53:08,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 20:53:08,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 20:53:08,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:53:05" (1/3) ... [2021-11-07 20:53:08,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7070113b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:53:08, skipping insertion in model container [2021-11-07 20:53:08,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:06" (2/3) ... [2021-11-07 20:53:08,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7070113b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:53:08, skipping insertion in model container [2021-11-07 20:53:08,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:53:08" (3/3) ... [2021-11-07 20:53:08,332 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test10-1.i [2021-11-07 20:53:08,336 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 20:53:08,336 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-11-07 20:53:08,370 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 20:53:08,375 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 [2021-11-07 20:53:08,375 INFO L340 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2021-11-07 20:53:08,408 INFO L276 IsEmpty]: Start isEmpty. Operand has 470 states, 453 states have (on average 1.7461368653421634) internal successors, (791), 469 states have internal predecessors, (791), 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) [2021-11-07 20:53:08,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 20:53:08,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 20:53:08,413 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 20:53:08,413 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 20:53:08,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 20:53:08,418 INFO L85 PathProgramCache]: Analyzing trace with hash -128377380, now seen corresponding path program 1 times [2021-11-07 20:53:08,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 20:53:08,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882485372] [2021-11-07 20:53:08,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:08,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 20:53:08,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 20:53:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 20:53:08,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 20:53:08,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882485372] [2021-11-07 20:53:08,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882485372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 20:53:08,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 20:53:08,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 20:53:08,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970711822] [2021-11-07 20:53:08,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 20:53:08,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 20:53:08,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 20:53:08,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 20:53:08,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 20:53:08,554 INFO L87 Difference]: Start difference. First operand has 470 states, 453 states have (on average 1.7461368653421634) internal successors, (791), 469 states have internal predecessors, (791), 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 20:53:08,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 20:53:08,590 INFO L93 Difference]: Finished difference Result 938 states and 1580 transitions. [2021-11-07 20:53:08,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 20:53:08,592 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-07 20:53:08,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 20:53:08,601 INFO L225 Difference]: With dead ends: 938 [2021-11-07 20:53:08,601 INFO L226 Difference]: Without dead ends: 465 [2021-11-07 20:53:08,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.02ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 20:53:08,607 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.18ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-07 20:53:08,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 3.18ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-07 20:53:08,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-11-07 20:53:08,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 465. [2021-11-07 20:53:08,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 449 states have (on average 1.354120267260579) internal successors, (608), 464 states have internal predecessors, (608), 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) [2021-11-07 20:53:08,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 608 transitions. [2021-11-07 20:53:08,653 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 608 transitions. Word has length 9 [2021-11-07 20:53:08,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 20:53:08,654 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 608 transitions. [2021-11-07 20:53:08,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 20:53:08,654 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 608 transitions. [2021-11-07 20:53:08,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 20:53:08,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 20:53:08,656 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] [2021-11-07 20:53:08,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 20:53:08,656 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 20:53:08,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 20:53:08,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1568739198, now seen corresponding path program 1 times [2021-11-07 20:53:08,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 20:53:08,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636651728] [2021-11-07 20:53:08,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:08,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 20:53:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 20:53:08,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 20:53:08,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 20:53:08,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636651728] [2021-11-07 20:53:08,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636651728] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 20:53:08,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 20:53:08,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 20:53:08,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733479256] [2021-11-07 20:53:08,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 20:53:08,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 20:53:08,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 20:53:08,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 20:53:08,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 20:53:08,713 INFO L87 Difference]: Start difference. First operand 465 states and 608 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 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) [2021-11-07 20:53:09,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 20:53:09,200 INFO L93 Difference]: Finished difference Result 831 states and 1087 transitions. [2021-11-07 20:53:09,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 20:53:09,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 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) Word has length 44 [2021-11-07 20:53:09,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 20:53:09,203 INFO L225 Difference]: With dead ends: 831 [2021-11-07 20:53:09,203 INFO L226 Difference]: Without dead ends: 540 [2021-11-07 20:53:09,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.36ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 20:53:09,205 INFO L933 BasicCegarLoop]: 579 mSDtfsCounter, 96 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 372.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1603 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.40ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 436.39ms IncrementalHoareTripleChecker+Time [2021-11-07 20:53:09,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1603 Invalid, 222 Unknown, 0 Unchecked, 7.40ms Time], IncrementalHoareTripleChecker [2 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 436.39ms Time] [2021-11-07 20:53:09,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-07 20:53:09,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 467. [2021-11-07 20:53:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 451 states have (on average 1.352549889135255) internal successors, (610), 466 states have internal predecessors, (610), 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) [2021-11-07 20:53:09,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 610 transitions. [2021-11-07 20:53:09,222 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 610 transitions. Word has length 44 [2021-11-07 20:53:09,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 20:53:09,222 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 610 transitions. [2021-11-07 20:53:09,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 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) [2021-11-07 20:53:09,223 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 610 transitions. [2021-11-07 20:53:09,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 20:53:09,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 20:53:09,225 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, 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] [2021-11-07 20:53:09,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 20:53:09,226 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 20:53:09,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 20:53:09,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1325558428, now seen corresponding path program 1 times [2021-11-07 20:53:09,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 20:53:09,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315164643] [2021-11-07 20:53:09,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:09,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 20:53:09,245 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 20:53:09,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891868585] [2021-11-07 20:53:09,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:09,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 20:53:09,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 20:53:09,264 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) [2021-11-07 20:53:09,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 20:53:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 20:53:09,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 20:53:09,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 20:53:09,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 20:53:09,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 20:53:09,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 20:53:09,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315164643] [2021-11-07 20:53:09,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 20:53:09,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891868585] [2021-11-07 20:53:09,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891868585] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 20:53:09,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 20:53:09,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 20:53:09,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912999914] [2021-11-07 20:53:09,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 20:53:09,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 20:53:09,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 20:53:09,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 20:53:09,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 20:53:09,634 INFO L87 Difference]: Start difference. First operand 467 states and 610 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-11-07 20:53:09,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 20:53:09,690 INFO L93 Difference]: Finished difference Result 951 states and 1247 transitions. [2021-11-07 20:53:09,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 20:53:09,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 97 [2021-11-07 20:53:09,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 20:53:09,692 INFO L225 Difference]: With dead ends: 951 [2021-11-07 20:53:09,693 INFO L226 Difference]: Without dead ends: 488 [2021-11-07 20:53:09,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.50ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 20:53:09,694 INFO L933 BasicCegarLoop]: 588 mSDtfsCounter, 9 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.02ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.35ms IncrementalHoareTripleChecker+Time [2021-11-07 20:53:09,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1161 Invalid, 72 Unknown, 0 Unchecked, 2.02ms Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 44.35ms Time] [2021-11-07 20:53:09,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-11-07 20:53:09,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 487. [2021-11-07 20:53:09,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 471 states have (on average 1.3375796178343948) internal successors, (630), 486 states have internal predecessors, (630), 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) [2021-11-07 20:53:09,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 630 transitions. [2021-11-07 20:53:09,708 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 630 transitions. Word has length 97 [2021-11-07 20:53:09,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 20:53:09,709 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 630 transitions. [2021-11-07 20:53:09,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-11-07 20:53:09,709 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 630 transitions. [2021-11-07 20:53:09,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 20:53:09,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 20:53:09,712 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, 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] [2021-11-07 20:53:09,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 20:53:09,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 20:53:09,932 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 20:53:09,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 20:53:09,933 INFO L85 PathProgramCache]: Analyzing trace with hash 948433376, now seen corresponding path program 1 times [2021-11-07 20:53:09,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 20:53:09,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665944455] [2021-11-07 20:53:09,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:09,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 20:53:09,948 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 20:53:09,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743099694] [2021-11-07 20:53:09,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:09,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 20:53:09,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 20:53:09,950 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) [2021-11-07 20:53:09,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 20:53:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 20:53:10,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 20:53:10,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 20:53:10,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 20:53:10,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 20:53:10,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 20:53:10,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665944455] [2021-11-07 20:53:10,249 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 20:53:10,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743099694] [2021-11-07 20:53:10,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743099694] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 20:53:10,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 20:53:10,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 20:53:10,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444078568] [2021-11-07 20:53:10,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 20:53:10,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 20:53:10,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 20:53:10,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 20:53:10,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 20:53:10,251 INFO L87 Difference]: Start difference. First operand 487 states and 630 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 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) [2021-11-07 20:53:10,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 20:53:10,299 INFO L93 Difference]: Finished difference Result 787 states and 1024 transitions. [2021-11-07 20:53:10,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 20:53:10,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 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) Word has length 97 [2021-11-07 20:53:10,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 20:53:10,301 INFO L225 Difference]: With dead ends: 787 [2021-11-07 20:53:10,302 INFO L226 Difference]: Without dead ends: 508 [2021-11-07 20:53:10,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.36ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 20:53:10,303 INFO L933 BasicCegarLoop]: 588 mSDtfsCounter, 9 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.61ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.43ms IncrementalHoareTripleChecker+Time [2021-11-07 20:53:10,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1161 Invalid, 72 Unknown, 0 Unchecked, 1.61ms Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 38.43ms Time] [2021-11-07 20:53:10,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-07 20:53:10,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 507. [2021-11-07 20:53:10,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 491 states have (on average 1.3238289205702647) internal successors, (650), 506 states have internal predecessors, (650), 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) [2021-11-07 20:53:10,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 650 transitions. [2021-11-07 20:53:10,312 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 650 transitions. Word has length 97 [2021-11-07 20:53:10,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 20:53:10,312 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 650 transitions. [2021-11-07 20:53:10,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 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) [2021-11-07 20:53:10,313 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 650 transitions. [2021-11-07 20:53:10,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 20:53:10,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 20:53:10,315 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, 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] [2021-11-07 20:53:10,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 20:53:10,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-07 20:53:10,534 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 20:53:10,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 20:53:10,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1352389214, now seen corresponding path program 1 times [2021-11-07 20:53:10,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 20:53:10,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322126507] [2021-11-07 20:53:10,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:10,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 20:53:10,554 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 20:53:10,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435467502] [2021-11-07 20:53:10,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:10,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 20:53:10,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 20:53:10,568 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) [2021-11-07 20:53:10,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 20:53:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 20:53:10,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 20:53:10,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 20:53:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 20:53:10,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 20:53:10,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 20:53:10,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322126507] [2021-11-07 20:53:10,916 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 20:53:10,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435467502] [2021-11-07 20:53:10,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435467502] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 20:53:10,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 20:53:10,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 20:53:10,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914982879] [2021-11-07 20:53:10,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 20:53:10,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 20:53:10,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 20:53:10,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 20:53:10,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 20:53:10,919 INFO L87 Difference]: Start difference. First operand 507 states and 650 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2021-11-07 20:53:10,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 20:53:10,976 INFO L93 Difference]: Finished difference Result 1086 states and 1400 transitions. [2021-11-07 20:53:10,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 20:53:10,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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 97 [2021-11-07 20:53:10,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 20:53:10,979 INFO L225 Difference]: With dead ends: 1086 [2021-11-07 20:53:10,979 INFO L226 Difference]: Without dead ends: 583 [2021-11-07 20:53:10,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.92ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 20:53:10,981 INFO L933 BasicCegarLoop]: 700 mSDtfsCounter, 596 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 1508 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.83ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.80ms IncrementalHoareTripleChecker+Time [2021-11-07 20:53:10,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 1508 Invalid, 66 Unknown, 0 Unchecked, 2.83ms Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 38.80ms Time] [2021-11-07 20:53:10,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-07 20:53:10,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 493. [2021-11-07 20:53:10,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 477 states have (on average 1.3186582809224319) internal successors, (629), 492 states have internal predecessors, (629), 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) [2021-11-07 20:53:10,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 629 transitions. [2021-11-07 20:53:10,990 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 629 transitions. Word has length 97 [2021-11-07 20:53:10,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 20:53:10,991 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 629 transitions. [2021-11-07 20:53:10,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2021-11-07 20:53:10,991 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 629 transitions. [2021-11-07 20:53:10,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 20:53:10,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 20:53:10,993 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, 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] [2021-11-07 20:53:11,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 20:53:11,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 20:53:11,210 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 20:53:11,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 20:53:11,211 INFO L85 PathProgramCache]: Analyzing trace with hash 881478960, now seen corresponding path program 1 times [2021-11-07 20:53:11,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 20:53:11,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335927693] [2021-11-07 20:53:11,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:11,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 20:53:11,223 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 20:53:11,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272132166] [2021-11-07 20:53:11,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:11,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 20:53:11,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 20:53:11,224 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) [2021-11-07 20:53:11,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 20:53:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 20:53:11,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 20:53:11,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 20:53:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 20:53:11,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 20:53:11,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 20:53:11,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335927693] [2021-11-07 20:53:11,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 20:53:11,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272132166] [2021-11-07 20:53:11,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272132166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 20:53:11,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 20:53:11,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 20:53:11,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179390921] [2021-11-07 20:53:11,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 20:53:11,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 20:53:11,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 20:53:11,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 20:53:11,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 20:53:11,496 INFO L87 Difference]: Start difference. First operand 493 states and 629 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 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) [2021-11-07 20:53:11,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 20:53:11,546 INFO L93 Difference]: Finished difference Result 761 states and 972 transitions. [2021-11-07 20:53:11,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 20:53:11,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 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) Word has length 97 [2021-11-07 20:53:11,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 20:53:11,548 INFO L225 Difference]: With dead ends: 761 [2021-11-07 20:53:11,549 INFO L226 Difference]: Without dead ends: 480 [2021-11-07 20:53:11,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.90ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 20:53:11,550 INFO L933 BasicCegarLoop]: 574 mSDtfsCounter, 365 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.87ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.74ms IncrementalHoareTripleChecker+Time [2021-11-07 20:53:11,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 1362 Invalid, 66 Unknown, 0 Unchecked, 1.87ms Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 37.74ms Time] [2021-11-07 20:53:11,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-11-07 20:53:11,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 479. [2021-11-07 20:53:11,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 463 states have (on average 1.3131749460043196) internal successors, (608), 478 states have internal predecessors, (608), 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) [2021-11-07 20:53:11,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 608 transitions. [2021-11-07 20:53:11,557 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 608 transitions. Word has length 97 [2021-11-07 20:53:11,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 20:53:11,557 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 608 transitions. [2021-11-07 20:53:11,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 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) [2021-11-07 20:53:11,558 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 608 transitions. [2021-11-07 20:53:11,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 20:53:11,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 20:53:11,559 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, 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] [2021-11-07 20:53:11,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 20:53:11,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 20:53:11,775 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 20:53:11,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 20:53:11,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1427704734, now seen corresponding path program 1 times [2021-11-07 20:53:11,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 20:53:11,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955459173] [2021-11-07 20:53:11,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:11,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 20:53:11,787 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 20:53:11,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347777203] [2021-11-07 20:53:11,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:11,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 20:53:11,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 20:53:11,799 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 20:53:11,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 20:53:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 20:53:11,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 20:53:11,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 20:53:12,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 20:53:12,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 20:53:12,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 20:53:12,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955459173] [2021-11-07 20:53:12,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 20:53:12,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347777203] [2021-11-07 20:53:12,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347777203] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 20:53:12,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 20:53:12,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 20:53:12,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003921527] [2021-11-07 20:53:12,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 20:53:12,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 20:53:12,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 20:53:12,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 20:53:12,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 20:53:12,217 INFO L87 Difference]: Start difference. First operand 479 states and 608 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-11-07 20:53:12,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 20:53:12,266 INFO L93 Difference]: Finished difference Result 1231 states and 1562 transitions. [2021-11-07 20:53:12,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 20:53:12,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 97 [2021-11-07 20:53:12,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 20:53:12,269 INFO L225 Difference]: With dead ends: 1231 [2021-11-07 20:53:12,269 INFO L226 Difference]: Without dead ends: 756 [2021-11-07 20:53:12,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.50ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 20:53:12,271 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 317 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.64ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.19ms IncrementalHoareTripleChecker+Time [2021-11-07 20:53:12,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 1159 Invalid, 19 Unknown, 0 Unchecked, 1.64ms Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 36.19ms Time] [2021-11-07 20:53:12,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-11-07 20:53:12,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 721. [2021-11-07 20:53:12,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 705 states have (on average 1.3191489361702127) internal successors, (930), 720 states have internal predecessors, (930), 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) [2021-11-07 20:53:12,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 930 transitions. [2021-11-07 20:53:12,284 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 930 transitions. Word has length 97 [2021-11-07 20:53:12,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 20:53:12,284 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 930 transitions. [2021-11-07 20:53:12,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-11-07 20:53:12,285 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 930 transitions. [2021-11-07 20:53:12,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 20:53:12,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 20:53:12,286 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, 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, 1, 1, 1, 1, 1, 1] [2021-11-07 20:53:12,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 20:53:12,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 20:53:12,519 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 20:53:12,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 20:53:12,519 INFO L85 PathProgramCache]: Analyzing trace with hash -371205377, now seen corresponding path program 1 times [2021-11-07 20:53:12,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 20:53:12,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374127371] [2021-11-07 20:53:12,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:12,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 20:53:12,531 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 20:53:12,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033575884] [2021-11-07 20:53:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:12,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 20:53:12,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 20:53:12,532 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 20:53:12,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 20:53:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 20:53:12,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 20:53:12,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 20:53:12,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 20:53:12,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 39 [2021-11-07 20:53:12,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 20:53:12,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 20:53:12,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 20:53:12,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374127371] [2021-11-07 20:53:12,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 20:53:12,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033575884] [2021-11-07 20:53:12,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033575884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 20:53:12,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 20:53:12,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 20:53:12,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749765933] [2021-11-07 20:53:12,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 20:53:12,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 20:53:12,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 20:53:12,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 20:53:12,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 20:53:12,903 INFO L87 Difference]: Start difference. First operand 721 states and 930 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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) [2021-11-07 20:53:13,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 20:53:13,404 INFO L93 Difference]: Finished difference Result 1354 states and 1745 transitions. [2021-11-07 20:53:13,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 20:53:13,405 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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 104 [2021-11-07 20:53:13,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 20:53:13,407 INFO L225 Difference]: With dead ends: 1354 [2021-11-07 20:53:13,407 INFO L226 Difference]: Without dead ends: 723 [2021-11-07 20:53:13,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.31ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 20:53:13,408 INFO L933 BasicCegarLoop]: 568 mSDtfsCounter, 98 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 402.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 2015 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.45ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 468.02ms IncrementalHoareTripleChecker+Time [2021-11-07 20:53:13,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 2015 Invalid, 372 Unknown, 0 Unchecked, 3.45ms Time], IncrementalHoareTripleChecker [12 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 468.02ms Time] [2021-11-07 20:53:13,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-11-07 20:53:13,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 721. [2021-11-07 20:53:13,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 705 states have (on average 1.3177304964539007) internal successors, (929), 720 states have internal predecessors, (929), 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) [2021-11-07 20:53:13,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 929 transitions. [2021-11-07 20:53:13,420 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 929 transitions. Word has length 104 [2021-11-07 20:53:13,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 20:53:13,421 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 929 transitions. [2021-11-07 20:53:13,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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) [2021-11-07 20:53:13,421 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 929 transitions. [2021-11-07 20:53:13,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-07 20:53:13,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 20:53:13,422 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, 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, 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, 1, 1, 1, 1, 1] [2021-11-07 20:53:13,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 20:53:13,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 20:53:13,636 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 20:53:13,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 20:53:13,636 INFO L85 PathProgramCache]: Analyzing trace with hash -560944154, now seen corresponding path program 1 times [2021-11-07 20:53:13,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 20:53:13,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438768121] [2021-11-07 20:53:13,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:13,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 20:53:13,648 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 20:53:13,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420919926] [2021-11-07 20:53:13,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:13,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 20:53:13,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 20:53:13,650 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 20:53:13,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 20:53:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 20:53:13,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 20:53:13,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 20:53:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 20:53:14,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 20:53:14,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 20:53:14,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438768121] [2021-11-07 20:53:14,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 20:53:14,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420919926] [2021-11-07 20:53:14,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420919926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 20:53:14,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 20:53:14,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 20:53:14,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756067843] [2021-11-07 20:53:14,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 20:53:14,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 20:53:14,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 20:53:14,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 20:53:14,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 20:53:14,024 INFO L87 Difference]: Start difference. First operand 721 states and 929 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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) [2021-11-07 20:53:14,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 20:53:14,070 INFO L93 Difference]: Finished difference Result 1466 states and 1899 transitions. [2021-11-07 20:53:14,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 20:53:14,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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 151 [2021-11-07 20:53:14,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 20:53:14,078 INFO L225 Difference]: With dead ends: 1466 [2021-11-07 20:53:14,078 INFO L226 Difference]: Without dead ends: 763 [2021-11-07 20:53:14,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.16ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 20:53:14,079 INFO L933 BasicCegarLoop]: 574 mSDtfsCounter, 9 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.80ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.23ms IncrementalHoareTripleChecker+Time [2021-11-07 20:53:14,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1133 Invalid, 72 Unknown, 0 Unchecked, 0.80ms Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 35.23ms Time] [2021-11-07 20:53:14,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-11-07 20:53:14,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 761. [2021-11-07 20:53:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 745 states have (on average 1.3006711409395972) internal successors, (969), 760 states have internal predecessors, (969), 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) [2021-11-07 20:53:14,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 969 transitions. [2021-11-07 20:53:14,109 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 969 transitions. Word has length 151 [2021-11-07 20:53:14,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 20:53:14,109 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 969 transitions. [2021-11-07 20:53:14,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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) [2021-11-07 20:53:14,109 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 969 transitions. [2021-11-07 20:53:14,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-07 20:53:14,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 20:53:14,111 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, 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, 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, 1, 1, 1, 1, 1] [2021-11-07 20:53:14,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 20:53:14,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 20:53:14,328 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 20:53:14,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 20:53:14,329 INFO L85 PathProgramCache]: Analyzing trace with hash 145652452, now seen corresponding path program 1 times [2021-11-07 20:53:14,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 20:53:14,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317148499] [2021-11-07 20:53:14,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:14,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 20:53:14,340 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 20:53:14,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236068264] [2021-11-07 20:53:14,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:14,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 20:53:14,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 20:53:14,342 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 20:53:14,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 20:53:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 20:53:14,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 20:53:14,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 20:53:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 20:53:14,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 20:53:14,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 20:53:14,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317148499] [2021-11-07 20:53:14,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 20:53:14,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236068264] [2021-11-07 20:53:14,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236068264] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 20:53:14,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 20:53:14,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 20:53:14,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104211100] [2021-11-07 20:53:14,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 20:53:14,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 20:53:14,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 20:53:14,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 20:53:14,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 20:53:14,777 INFO L87 Difference]: Start difference. First operand 761 states and 969 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 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) [2021-11-07 20:53:14,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 20:53:14,830 INFO L93 Difference]: Finished difference Result 1460 states and 1864 transitions. [2021-11-07 20:53:14,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 20:53:14,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 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 151 [2021-11-07 20:53:14,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 20:53:14,832 INFO L225 Difference]: With dead ends: 1460 [2021-11-07 20:53:14,832 INFO L226 Difference]: Without dead ends: 735 [2021-11-07 20:53:14,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.31ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 20:53:14,834 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 582 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.08ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.66ms IncrementalHoareTripleChecker+Time [2021-11-07 20:53:14,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 1147 Invalid, 65 Unknown, 0 Unchecked, 1.08ms Time], IncrementalHoareTripleChecker [25 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 37.66ms Time] [2021-11-07 20:53:14,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2021-11-07 20:53:14,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 733. [2021-11-07 20:53:14,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 717 states have (on average 1.292887029288703) internal successors, (927), 732 states have internal predecessors, (927), 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) [2021-11-07 20:53:14,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 927 transitions. [2021-11-07 20:53:14,845 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 927 transitions. Word has length 151 [2021-11-07 20:53:14,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 20:53:14,845 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 927 transitions. [2021-11-07 20:53:14,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 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) [2021-11-07 20:53:14,845 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 927 transitions. [2021-11-07 20:53:14,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-07 20:53:14,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 20:53:14,846 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, 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, 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, 1, 1, 1, 1, 1] [2021-11-07 20:53:14,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 20:53:15,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 20:53:15,064 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 20:53:15,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 20:53:15,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1850791156, now seen corresponding path program 1 times [2021-11-07 20:53:15,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 20:53:15,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879530279] [2021-11-07 20:53:15,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:15,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 20:53:15,076 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 20:53:15,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513261783] [2021-11-07 20:53:15,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:15,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 20:53:15,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 20:53:15,077 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 20:53:15,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 20:53:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 20:53:15,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 20:53:15,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 20:53:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 20:53:15,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 20:53:15,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 20:53:15,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879530279] [2021-11-07 20:53:15,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 20:53:15,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513261783] [2021-11-07 20:53:15,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513261783] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 20:53:15,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 20:53:15,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 20:53:15,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490827476] [2021-11-07 20:53:15,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 20:53:15,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 20:53:15,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 20:53:15,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 20:53:15,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 20:53:15,503 INFO L87 Difference]: Start difference. First operand 733 states and 927 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 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) [2021-11-07 20:53:15,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 20:53:15,596 INFO L93 Difference]: Finished difference Result 2155 states and 2732 transitions. [2021-11-07 20:53:15,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 20:53:15,597 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 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 151 [2021-11-07 20:53:15,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 20:53:15,600 INFO L225 Difference]: With dead ends: 2155 [2021-11-07 20:53:15,600 INFO L226 Difference]: Without dead ends: 1460 [2021-11-07 20:53:15,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.46ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 20:53:15,602 INFO L933 BasicCegarLoop]: 578 mSDtfsCounter, 571 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 2268 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.98ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.85ms IncrementalHoareTripleChecker+Time [2021-11-07 20:53:15,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 2268 Invalid, 104 Unknown, 0 Unchecked, 3.98ms Time], IncrementalHoareTripleChecker [27 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 68.85ms Time] [2021-11-07 20:53:15,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-11-07 20:53:15,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 779. [2021-11-07 20:53:15,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 763 states have (on average 1.2804718217562254) internal successors, (977), 778 states have internal predecessors, (977), 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) [2021-11-07 20:53:15,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 977 transitions. [2021-11-07 20:53:15,618 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 977 transitions. Word has length 151 [2021-11-07 20:53:15,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 20:53:15,618 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 977 transitions. [2021-11-07 20:53:15,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 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) [2021-11-07 20:53:15,618 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 977 transitions. [2021-11-07 20:53:15,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-07 20:53:15,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 20:53:15,619 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, 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, 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, 1, 1, 1, 1, 1] [2021-11-07 20:53:15,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 20:53:15,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 20:53:15,837 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 20:53:15,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 20:53:15,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1918499578, now seen corresponding path program 1 times [2021-11-07 20:53:15,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 20:53:15,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407787277] [2021-11-07 20:53:15,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:15,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 20:53:15,860 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 20:53:15,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498154706] [2021-11-07 20:53:15,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:15,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 20:53:15,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 20:53:15,862 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 20:53:15,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 20:53:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 20:53:16,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 20:53:16,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 20:53:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 20:53:16,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 20:53:16,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 20:53:16,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407787277] [2021-11-07 20:53:16,246 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 20:53:16,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498154706] [2021-11-07 20:53:16,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498154706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 20:53:16,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 20:53:16,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 20:53:16,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827524240] [2021-11-07 20:53:16,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 20:53:16,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 20:53:16,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 20:53:16,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 20:53:16,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 20:53:16,249 INFO L87 Difference]: Start difference. First operand 779 states and 977 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 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) [2021-11-07 20:53:16,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 20:53:16,317 INFO L93 Difference]: Finished difference Result 1467 states and 1851 transitions. [2021-11-07 20:53:16,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 20:53:16,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 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 151 [2021-11-07 20:53:16,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 20:53:16,319 INFO L225 Difference]: With dead ends: 1467 [2021-11-07 20:53:16,319 INFO L226 Difference]: Without dead ends: 715 [2021-11-07 20:53:16,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.52ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 20:53:16,321 INFO L933 BasicCegarLoop]: 571 mSDtfsCounter, 562 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1141 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.61ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.84ms IncrementalHoareTripleChecker+Time [2021-11-07 20:53:16,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 1141 Invalid, 41 Unknown, 0 Unchecked, 1.61ms Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 19.84ms Time] [2021-11-07 20:53:16,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-11-07 20:53:16,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 715. [2021-11-07 20:53:16,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 699 states have (on average 1.2861230329041489) internal successors, (899), 714 states have internal predecessors, (899), 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) [2021-11-07 20:53:16,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 899 transitions. [2021-11-07 20:53:16,333 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 899 transitions. Word has length 151 [2021-11-07 20:53:16,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 20:53:16,333 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 899 transitions. [2021-11-07 20:53:16,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 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) [2021-11-07 20:53:16,333 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 899 transitions. [2021-11-07 20:53:16,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-07 20:53:16,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 20:53:16,334 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, 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, 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, 1, 1, 1, 1, 1] [2021-11-07 20:53:16,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 20:53:16,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 20:53:16,547 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 20:53:16,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 20:53:16,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1737579534, now seen corresponding path program 1 times [2021-11-07 20:53:16,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 20:53:16,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477153552] [2021-11-07 20:53:16,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:16,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 20:53:16,564 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 20:53:16,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200911156] [2021-11-07 20:53:16,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:16,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 20:53:16,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 20:53:16,580 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 20:53:16,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 20:53:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 20:53:16,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 20:53:16,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 20:53:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 20:53:17,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 20:53:17,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 20:53:17,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477153552] [2021-11-07 20:53:17,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 20:53:17,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200911156] [2021-11-07 20:53:17,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200911156] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 20:53:17,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 20:53:17,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 20:53:17,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858461853] [2021-11-07 20:53:17,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 20:53:17,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 20:53:17,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 20:53:17,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 20:53:17,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 20:53:17,037 INFO L87 Difference]: Start difference. First operand 715 states and 899 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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) [2021-11-07 20:53:17,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 20:53:17,083 INFO L93 Difference]: Finished difference Result 1699 states and 2167 transitions. [2021-11-07 20:53:17,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 20:53:17,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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 151 [2021-11-07 20:53:17,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 20:53:17,086 INFO L225 Difference]: With dead ends: 1699 [2021-11-07 20:53:17,086 INFO L226 Difference]: Without dead ends: 1033 [2021-11-07 20:53:17,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.73ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 20:53:17,088 INFO L933 BasicCegarLoop]: 577 mSDtfsCounter, 294 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.02ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.89ms IncrementalHoareTripleChecker+Time [2021-11-07 20:53:17,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 1129 Invalid, 19 Unknown, 0 Unchecked, 1.02ms Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 32.89ms Time] [2021-11-07 20:53:17,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-11-07 20:53:17,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 876. [2021-11-07 20:53:17,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 860 states have (on average 1.3093023255813954) internal successors, (1126), 875 states have internal predecessors, (1126), 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) [2021-11-07 20:53:17,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1126 transitions. [2021-11-07 20:53:17,104 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1126 transitions. Word has length 151 [2021-11-07 20:53:17,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 20:53:17,104 INFO L470 AbstractCegarLoop]: Abstraction has 876 states and 1126 transitions. [2021-11-07 20:53:17,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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) [2021-11-07 20:53:17,104 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1126 transitions. [2021-11-07 20:53:17,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-07 20:53:17,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 20:53:17,105 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 20:53:17,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 20:53:17,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 20:53:17,320 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 20:53:17,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 20:53:17,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1603750718, now seen corresponding path program 1 times [2021-11-07 20:53:17,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 20:53:17,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744726805] [2021-11-07 20:53:17,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:17,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 20:53:17,329 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 20:53:17,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410029226] [2021-11-07 20:53:17,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:17,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 20:53:17,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 20:53:17,341 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 20:53:17,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 20:53:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 20:53:17,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 20:53:17,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 20:53:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 20:53:17,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 20:53:17,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 20:53:17,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744726805] [2021-11-07 20:53:17,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 20:53:17,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410029226] [2021-11-07 20:53:17,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410029226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 20:53:17,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 20:53:17,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 20:53:17,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637142949] [2021-11-07 20:53:17,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 20:53:17,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 20:53:17,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 20:53:17,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 20:53:17,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 20:53:17,816 INFO L87 Difference]: Start difference. First operand 876 states and 1126 transitions. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 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) [2021-11-07 20:53:18,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 20:53:18,267 INFO L93 Difference]: Finished difference Result 1453 states and 1865 transitions. [2021-11-07 20:53:18,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 20:53:18,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 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 158 [2021-11-07 20:53:18,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 20:53:18,269 INFO L225 Difference]: With dead ends: 1453 [2021-11-07 20:53:18,269 INFO L226 Difference]: Without dead ends: 704 [2021-11-07 20:53:18,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.66ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 20:53:18,270 INFO L933 BasicCegarLoop]: 547 mSDtfsCounter, 991 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 408.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 991 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.43ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 433.63ms IncrementalHoareTripleChecker+Time [2021-11-07 20:53:18,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [991 Valid, 589 Invalid, 80 Unknown, 0 Unchecked, 1.43ms Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 433.63ms Time] [2021-11-07 20:53:18,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-11-07 20:53:18,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 704. [2021-11-07 20:53:18,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 688 states have (on average 1.2805232558139534) internal successors, (881), 703 states have internal predecessors, (881), 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) [2021-11-07 20:53:18,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 881 transitions. [2021-11-07 20:53:18,282 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 881 transitions. Word has length 158 [2021-11-07 20:53:18,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 20:53:18,282 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 881 transitions. [2021-11-07 20:53:18,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 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) [2021-11-07 20:53:18,282 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 881 transitions. [2021-11-07 20:53:18,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-07 20:53:18,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 20:53:18,284 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 20:53:18,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 20:53:18,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 20:53:18,502 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 20:53:18,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 20:53:18,503 INFO L85 PathProgramCache]: Analyzing trace with hash -881822645, now seen corresponding path program 1 times [2021-11-07 20:53:18,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 20:53:18,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657726648] [2021-11-07 20:53:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:18,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 20:53:18,517 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 20:53:18,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201920924] [2021-11-07 20:53:18,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:18,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 20:53:18,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 20:53:18,518 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 20:53:18,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 20:53:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 20:53:18,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 20:53:18,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 20:53:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 20:53:19,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 20:53:19,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 20:53:19,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657726648] [2021-11-07 20:53:19,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 20:53:19,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201920924] [2021-11-07 20:53:19,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201920924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 20:53:19,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 20:53:19,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 20:53:19,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822718525] [2021-11-07 20:53:19,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 20:53:19,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 20:53:19,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 20:53:19,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 20:53:19,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 20:53:19,105 INFO L87 Difference]: Start difference. First operand 704 states and 881 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 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) [2021-11-07 20:53:19,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 20:53:19,134 INFO L93 Difference]: Finished difference Result 1364 states and 1718 transitions. [2021-11-07 20:53:19,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 20:53:19,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 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 165 [2021-11-07 20:53:19,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 20:53:19,137 INFO L225 Difference]: With dead ends: 1364 [2021-11-07 20:53:19,137 INFO L226 Difference]: Without dead ends: 706 [2021-11-07 20:53:19,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.35ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 20:53:19,140 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 0 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.77ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.63ms IncrementalHoareTripleChecker+Time [2021-11-07 20:53:19,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1134 Invalid, 20 Unknown, 0 Unchecked, 0.77ms Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 19.63ms Time] [2021-11-07 20:53:19,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-11-07 20:53:19,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 706. [2021-11-07 20:53:19,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 690 states have (on average 1.2797101449275363) internal successors, (883), 705 states have internal predecessors, (883), 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) [2021-11-07 20:53:19,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 883 transitions. [2021-11-07 20:53:19,169 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 883 transitions. Word has length 165 [2021-11-07 20:53:19,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 20:53:19,169 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 883 transitions. [2021-11-07 20:53:19,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 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) [2021-11-07 20:53:19,169 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 883 transitions. [2021-11-07 20:53:19,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-07 20:53:19,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 20:53:19,171 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 20:53:19,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-07 20:53:19,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 20:53:19,394 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 20:53:19,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 20:53:19,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1687246210, now seen corresponding path program 1 times [2021-11-07 20:53:19,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 20:53:19,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564718068] [2021-11-07 20:53:19,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:19,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 20:53:19,409 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 20:53:19,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2038471760] [2021-11-07 20:53:19,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:19,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 20:53:19,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 20:53:19,415 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 20:53:19,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 20:53:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 20:53:20,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 20:53:20,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 20:53:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 20:53:20,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 20:53:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 20:53:20,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 20:53:20,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564718068] [2021-11-07 20:53:20,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 20:53:20,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038471760] [2021-11-07 20:53:20,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038471760] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 20:53:20,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 20:53:20,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-07 20:53:20,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854588152] [2021-11-07 20:53:20,606 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-07 20:53:20,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 20:53:20,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 20:53:20,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 20:53:20,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 20:53:20,607 INFO L87 Difference]: Start difference. First operand 706 states and 883 transitions. Second operand has 6 states, 6 states have (on average 28.333333333333332) internal successors, (170), 6 states have internal predecessors, (170), 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) [2021-11-07 20:53:20,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 20:53:20,711 INFO L93 Difference]: Finished difference Result 1379 states and 1742 transitions. [2021-11-07 20:53:20,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 20:53:20,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.333333333333332) internal successors, (170), 6 states have internal predecessors, (170), 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 167 [2021-11-07 20:53:20,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 20:53:20,714 INFO L225 Difference]: With dead ends: 1379 [2021-11-07 20:53:20,714 INFO L226 Difference]: Without dead ends: 716 [2021-11-07 20:53:20,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.82ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-07 20:53:20,715 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 0 mSDsluCounter, 1118 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1691 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.16ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.55ms IncrementalHoareTripleChecker+Time [2021-11-07 20:53:20,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1691 Invalid, 69 Unknown, 0 Unchecked, 1.16ms Time], IncrementalHoareTripleChecker [23 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 64.55ms Time] [2021-11-07 20:53:20,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-11-07 20:53:20,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2021-11-07 20:53:20,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 700 states have (on average 1.2757142857142858) internal successors, (893), 715 states have internal predecessors, (893), 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) [2021-11-07 20:53:20,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 893 transitions. [2021-11-07 20:53:20,727 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 893 transitions. Word has length 167 [2021-11-07 20:53:20,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 20:53:20,727 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 893 transitions. [2021-11-07 20:53:20,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.333333333333332) internal successors, (170), 6 states have internal predecessors, (170), 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) [2021-11-07 20:53:20,727 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 893 transitions. [2021-11-07 20:53:20,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-07 20:53:20,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 20:53:20,729 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 20:53:20,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-07 20:53:20,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 20:53:20,953 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 20:53:20,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 20:53:20,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1200882837, now seen corresponding path program 1 times [2021-11-07 20:53:20,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 20:53:20,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305756726] [2021-11-07 20:53:20,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:20,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 20:53:20,964 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 20:53:20,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954861562] [2021-11-07 20:53:20,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:20,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 20:53:20,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 20:53:20,967 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 20:53:20,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 20:53:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 20:53:21,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 20:53:21,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 20:53:21,886 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 20:53:21,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 20:53:22,176 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 20:53:22,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 20:53:22,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305756726] [2021-11-07 20:53:22,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 20:53:22,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954861562] [2021-11-07 20:53:22,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954861562] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 20:53:22,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 20:53:22,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-11-07 20:53:22,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687647915] [2021-11-07 20:53:22,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-07 20:53:22,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 20:53:22,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 20:53:22,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 20:53:22,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-07 20:53:22,178 INFO L87 Difference]: Start difference. First operand 716 states and 893 transitions. Second operand has 13 states, 13 states have (on average 13.846153846153847) internal successors, (180), 13 states have internal predecessors, (180), 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) [2021-11-07 20:53:22,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 20:53:22,955 INFO L93 Difference]: Finished difference Result 1405 states and 1776 transitions. [2021-11-07 20:53:22,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 20:53:22,955 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 13.846153846153847) internal successors, (180), 13 states have internal predecessors, (180), 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 177 [2021-11-07 20:53:22,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 20:53:22,957 INFO L225 Difference]: With dead ends: 1405 [2021-11-07 20:53:22,957 INFO L226 Difference]: Without dead ends: 734 [2021-11-07 20:53:22,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 378.43ms TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-11-07 20:53:22,959 INFO L933 BasicCegarLoop]: 569 mSDtfsCounter, 574 mSDsluCounter, 2783 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 418.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 3352 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.83ms SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 452.33ms IncrementalHoareTripleChecker+Time [2021-11-07 20:53:22,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 3352 Invalid, 331 Unknown, 0 Unchecked, 2.83ms Time], IncrementalHoareTripleChecker [116 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 452.33ms Time] [2021-11-07 20:53:22,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-11-07 20:53:22,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2021-11-07 20:53:22,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 718 states have (on average 1.2688022284122562) internal successors, (911), 733 states have internal predecessors, (911), 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) [2021-11-07 20:53:22,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 911 transitions. [2021-11-07 20:53:22,975 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 911 transitions. Word has length 177 [2021-11-07 20:53:22,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 20:53:22,975 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 911 transitions. [2021-11-07 20:53:22,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.846153846153847) internal successors, (180), 13 states have internal predecessors, (180), 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) [2021-11-07 20:53:22,976 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 911 transitions. [2021-11-07 20:53:22,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-07 20:53:22,978 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 20:53:22,978 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 20:53:23,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 20:53:23,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 20:53:23,201 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 20:53:23,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 20:53:23,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1993521346, now seen corresponding path program 2 times [2021-11-07 20:53:23,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 20:53:23,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955880771] [2021-11-07 20:53:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:23,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 20:53:23,214 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 20:53:23,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616817857] [2021-11-07 20:53:23,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 20:53:23,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 20:53:23,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 20:53:23,216 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 20:53:23,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 20:53:24,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 20:53:24,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 20:53:24,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 20:53:24,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 20:53:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-11-07 20:53:24,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 20:53:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-11-07 20:53:24,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 20:53:24,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955880771] [2021-11-07 20:53:24,960 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 20:53:24,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616817857] [2021-11-07 20:53:24,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616817857] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 20:53:24,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 20:53:24,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-07 20:53:24,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421457693] [2021-11-07 20:53:24,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-07 20:53:24,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 20:53:24,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 20:53:24,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 20:53:24,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-07 20:53:24,962 INFO L87 Difference]: Start difference. First operand 734 states and 911 transitions. Second operand has 14 states, 14 states have (on average 12.857142857142858) internal successors, (180), 14 states have internal predecessors, (180), 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) [2021-11-07 20:53:27,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 20:53:27,657 INFO L93 Difference]: Finished difference Result 2087 states and 2639 transitions. [2021-11-07 20:53:27,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 20:53:27,658 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.857142857142858) internal successors, (180), 14 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-11-07 20:53:27,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 20:53:27,662 INFO L225 Difference]: With dead ends: 2087 [2021-11-07 20:53:27,662 INFO L226 Difference]: Without dead ends: 1401 [2021-11-07 20:53:27,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1294.09ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-11-07 20:53:27,664 INFO L933 BasicCegarLoop]: 1098 mSDtfsCounter, 2811 mSDsluCounter, 6765 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1374.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2811 SdHoareTripleChecker+Valid, 7863 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.09ms SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1437.63ms IncrementalHoareTripleChecker+Time [2021-11-07 20:53:27,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2811 Valid, 7863 Invalid, 391 Unknown, 0 Unchecked, 5.09ms Time], IncrementalHoareTripleChecker [154 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 1437.63ms Time] [2021-11-07 20:53:27,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-11-07 20:53:27,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 766. [2021-11-07 20:53:27,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 750 states have (on average 1.2613333333333334) internal successors, (946), 765 states have internal predecessors, (946), 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) [2021-11-07 20:53:27,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 946 transitions. [2021-11-07 20:53:27,683 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 946 transitions. Word has length 195 [2021-11-07 20:53:27,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 20:53:27,684 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 946 transitions. [2021-11-07 20:53:27,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.857142857142858) internal successors, (180), 14 states have internal predecessors, (180), 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) [2021-11-07 20:53:27,684 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 946 transitions. [2021-11-07 20:53:27,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-07 20:53:27,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 20:53:27,686 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 20:53:27,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 20:53:27,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 20:53:27,908 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 20:53:27,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 20:53:27,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1010036309, now seen corresponding path program 3 times [2021-11-07 20:53:27,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 20:53:27,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774143473] [2021-11-07 20:53:27,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 20:53:27,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 20:53:27,922 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 20:53:27,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756637497] [2021-11-07 20:53:27,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 20:53:27,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 20:53:27,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 20:53:27,931 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 20:53:27,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process Killed by 15