./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array8_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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/array-patterns/array8_pattern.c -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 06625eaf591a62e295090a882d83c1e11aaafca7ac8895e7d4adcf51d5b26e02 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 09:49:50,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 09:49:50,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 09:49:50,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 09:49:51,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 09:49:51,001 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 09:49:51,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 09:49:51,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 09:49:51,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 09:49:51,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 09:49:51,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 09:49:51,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 09:49:51,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 09:49:51,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 09:49:51,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 09:49:51,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 09:49:51,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 09:49:51,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 09:49:51,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 09:49:51,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 09:49:51,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 09:49:51,024 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 09:49:51,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 09:49:51,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 09:49:51,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 09:49:51,029 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 09:49:51,033 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 09:49:51,034 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 09:49:51,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 09:49:51,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 09:49:51,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 09:49:51,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 09:49:51,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 09:49:51,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 09:49:51,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 09:49:51,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 09:49:51,041 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 09:49:51,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 09:49:51,043 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 09:49:51,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 09:49:51,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 09:49:51,046 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 09:49:51,071 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 09:49:51,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 09:49:51,072 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 09:49:51,072 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 09:49:51,073 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 09:49:51,073 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 09:49:51,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 09:49:51,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 09:49:51,075 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 09:49:51,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 09:49:51,076 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 09:49:51,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 09:49:51,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 09:49:51,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 09:49:51,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 09:49:51,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 09:49:51,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 09:49:51,077 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 09:49:51,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 09:49:51,078 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 09:49:51,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 09:49:51,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 09:49:51,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 09:49:51,078 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 09:49:51,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:49:51,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 09:49:51,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 09:49:51,079 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 09:49:51,079 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 09:49:51,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 09:49:51,080 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 09:49:51,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 09:49:51,080 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 09:49:51,080 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 09:49:51,081 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 09:49:51,081 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06625eaf591a62e295090a882d83c1e11aaafca7ac8895e7d4adcf51d5b26e02 [2023-02-15 09:49:51,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 09:49:51,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 09:49:51,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 09:49:51,365 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 09:49:51,365 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 09:49:51,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array8_pattern.c [2023-02-15 09:49:52,457 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 09:49:52,629 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 09:49:52,629 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array8_pattern.c [2023-02-15 09:49:52,637 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/063bdfd77/dc173c2d32364416be83e41637313881/FLAGd6abb375f [2023-02-15 09:49:53,040 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/063bdfd77/dc173c2d32364416be83e41637313881 [2023-02-15 09:49:53,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 09:49:53,043 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 09:49:53,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 09:49:53,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 09:49:53,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 09:49:53,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:49:53" (1/1) ... [2023-02-15 09:49:53,049 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ea2f940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:49:53, skipping insertion in model container [2023-02-15 09:49:53,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:49:53" (1/1) ... [2023-02-15 09:49:53,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 09:49:53,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 09:49:53,196 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array8_pattern.c[1321,1334] [2023-02-15 09:49:53,211 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:49:53,217 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 09:49:53,225 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array8_pattern.c[1321,1334] [2023-02-15 09:49:53,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:49:53,244 INFO L208 MainTranslator]: Completed translation [2023-02-15 09:49:53,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:49:53 WrapperNode [2023-02-15 09:49:53,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 09:49:53,246 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 09:49:53,246 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 09:49:53,246 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 09:49:53,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:49:53" (1/1) ... [2023-02-15 09:49:53,256 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:49:53" (1/1) ... [2023-02-15 09:49:53,283 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2023-02-15 09:49:53,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 09:49:53,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 09:49:53,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 09:49:53,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 09:49:53,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:49:53" (1/1) ... [2023-02-15 09:49:53,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:49:53" (1/1) ... [2023-02-15 09:49:53,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:49:53" (1/1) ... [2023-02-15 09:49:53,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:49:53" (1/1) ... [2023-02-15 09:49:53,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:49:53" (1/1) ... [2023-02-15 09:49:53,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:49:53" (1/1) ... [2023-02-15 09:49:53,315 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:49:53" (1/1) ... [2023-02-15 09:49:53,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:49:53" (1/1) ... [2023-02-15 09:49:53,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 09:49:53,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 09:49:53,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 09:49:53,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 09:49:53,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:49:53" (1/1) ... [2023-02-15 09:49:53,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:49:53,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:49:53,358 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) [2023-02-15 09:49:53,379 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 [2023-02-15 09:49:53,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 09:49:53,404 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-15 09:49:53,405 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-15 09:49:53,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 09:49:53,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 09:49:53,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 09:49:53,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 09:49:53,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 09:49:53,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 09:49:53,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 09:49:53,465 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 09:49:53,467 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 09:49:53,589 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 09:49:53,595 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 09:49:53,595 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 09:49:53,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:49:53 BoogieIcfgContainer [2023-02-15 09:49:53,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 09:49:53,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 09:49:53,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 09:49:53,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 09:49:53,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:49:53" (1/3) ... [2023-02-15 09:49:53,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33279325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:49:53, skipping insertion in model container [2023-02-15 09:49:53,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:49:53" (2/3) ... [2023-02-15 09:49:53,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33279325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:49:53, skipping insertion in model container [2023-02-15 09:49:53,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:49:53" (3/3) ... [2023-02-15 09:49:53,604 INFO L112 eAbstractionObserver]: Analyzing ICFG array8_pattern.c [2023-02-15 09:49:53,615 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 09:49:53,615 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 09:49:53,653 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 09:49:53,658 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5a7ff031, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 09:49:53,658 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 09:49:53,661 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:49:53,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 09:49:53,665 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:49:53,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:49:53,666 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:49:53,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:49:53,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1127586545, now seen corresponding path program 1 times [2023-02-15 09:49:53,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:49:53,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216749305] [2023-02-15 09:49:53,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:49:53,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:49:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:49:53,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 09:49:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:49:53,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:49:53,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:49:53,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216749305] [2023-02-15 09:49:53,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216749305] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:49:53,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:49:53,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 09:49:53,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250755718] [2023-02-15 09:49:53,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:49:53,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 09:49:53,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:49:53,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 09:49:53,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 09:49:53,824 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 09:49:53,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:49:53,843 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2023-02-15 09:49:53,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 09:49:53,844 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-02-15 09:49:53,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:49:53,849 INFO L225 Difference]: With dead ends: 53 [2023-02-15 09:49:53,849 INFO L226 Difference]: Without dead ends: 24 [2023-02-15 09:49:53,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 09:49:53,854 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:49:53,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:49:53,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-15 09:49:53,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-15 09:49:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:49:53,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-02-15 09:49:53,879 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2023-02-15 09:49:53,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:49:53,879 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-02-15 09:49:53,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 09:49:53,880 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-02-15 09:49:53,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 09:49:53,881 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:49:53,881 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:49:53,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 09:49:53,882 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:49:53,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:49:53,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1008571545, now seen corresponding path program 1 times [2023-02-15 09:49:53,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:49:53,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455936047] [2023-02-15 09:49:53,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:49:53,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:49:53,911 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:49:53,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766842691] [2023-02-15 09:49:53,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:49:53,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:49:53,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:49:53,925 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) [2023-02-15 09:49:53,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 09:49:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:49:54,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 09:49:54,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:49:54,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:49:54,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 09:49:54,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:49:54,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455936047] [2023-02-15 09:49:54,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:49:54,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766842691] [2023-02-15 09:49:54,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766842691] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:49:54,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:49:54,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 09:49:54,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202987248] [2023-02-15 09:49:54,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:49:54,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 09:49:54,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:49:54,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 09:49:54,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 09:49:54,173 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:49:54,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:49:54,301 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2023-02-15 09:49:54,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 09:49:54,301 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-02-15 09:49:54,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:49:54,302 INFO L225 Difference]: With dead ends: 50 [2023-02-15 09:49:54,303 INFO L226 Difference]: Without dead ends: 32 [2023-02-15 09:49:54,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-02-15 09:49:54,306 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 27 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:49:54,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 60 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:49:54,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-15 09:49:54,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2023-02-15 09:49:54,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:49:54,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-02-15 09:49:54,324 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2023-02-15 09:49:54,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:49:54,324 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-02-15 09:49:54,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:49:54,325 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-02-15 09:49:54,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 09:49:54,326 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:49:54,327 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 09:49:54,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 09:49:54,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:49:54,532 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:49:54,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:49:54,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1890411897, now seen corresponding path program 1 times [2023-02-15 09:49:54,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:49:54,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43878303] [2023-02-15 09:49:54,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:49:54,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:49:54,568 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:49:54,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [898096640] [2023-02-15 09:49:54,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:49:54,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:49:54,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:49:54,571 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) [2023-02-15 09:49:54,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 09:49:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:49:54,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-15 09:49:54,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:49:54,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2023-02-15 09:49:54,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:49:54,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2023-02-15 09:49:54,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-02-15 09:49:55,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-02-15 09:49:55,385 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:49:55,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 32 [2023-02-15 09:49:55,540 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:49:55,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 12 [2023-02-15 09:49:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:49:55,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:49:55,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:49:55,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43878303] [2023-02-15 09:49:55,920 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:49:55,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898096640] [2023-02-15 09:49:55,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898096640] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:49:55,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:49:55,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-15 09:49:55,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425979155] [2023-02-15 09:49:55,921 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 09:49:55,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 09:49:55,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:49:55,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 09:49:55,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2023-02-15 09:49:55,923 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:49:56,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:49:56,480 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2023-02-15 09:49:56,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 09:49:56,481 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-02-15 09:49:56,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:49:56,482 INFO L225 Difference]: With dead ends: 77 [2023-02-15 09:49:56,482 INFO L226 Difference]: Without dead ends: 57 [2023-02-15 09:49:56,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 09:49:56,484 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 09:49:56,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 181 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 09:49:56,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-15 09:49:56,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2023-02-15 09:49:56,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:49:56,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2023-02-15 09:49:56,494 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 29 [2023-02-15 09:49:56,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:49:56,495 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2023-02-15 09:49:56,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:49:56,495 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2023-02-15 09:49:56,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 09:49:56,496 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:49:56,496 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:49:56,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 09:49:56,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-15 09:49:56,702 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:49:56,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:49:56,702 INFO L85 PathProgramCache]: Analyzing trace with hash -32099493, now seen corresponding path program 2 times [2023-02-15 09:49:56,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:49:56,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3522189] [2023-02-15 09:49:56,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:49:56,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:49:56,724 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:49:56,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914554157] [2023-02-15 09:49:56,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:49:56,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:49:56,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:49:56,726 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) [2023-02-15 09:49:56,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 09:49:56,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:49:56,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:49:56,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 09:49:56,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:49:56,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:49:56,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:49:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 09:49:56,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:49:56,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3522189] [2023-02-15 09:49:56,896 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:49:56,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914554157] [2023-02-15 09:49:56,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914554157] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:49:56,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:49:56,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-15 09:49:56,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715824181] [2023-02-15 09:49:56,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:49:56,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 09:49:56,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:49:56,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 09:49:56,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 09:49:56,899 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 09:49:56,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:49:56,984 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2023-02-15 09:49:56,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 09:49:56,987 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-02-15 09:49:56,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:49:56,990 INFO L225 Difference]: With dead ends: 61 [2023-02-15 09:49:56,990 INFO L226 Difference]: Without dead ends: 40 [2023-02-15 09:49:56,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-02-15 09:49:56,994 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:49:56,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 87 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:49:56,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-15 09:49:57,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2023-02-15 09:49:57,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:49:57,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-02-15 09:49:57,010 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 31 [2023-02-15 09:49:57,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:49:57,010 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-02-15 09:49:57,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 09:49:57,010 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-02-15 09:49:57,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 09:49:57,011 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:49:57,012 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:49:57,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 09:49:57,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:49:57,217 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:49:57,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:49:57,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1857874167, now seen corresponding path program 3 times [2023-02-15 09:49:57,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:49:57,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59010290] [2023-02-15 09:49:57,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:49:57,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:49:57,241 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:49:57,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609771895] [2023-02-15 09:49:57,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:49:57,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:49:57,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:49:57,244 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) [2023-02-15 09:49:57,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 09:49:57,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 09:49:57,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:49:57,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 09:49:57,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:49:57,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:49:57,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:49:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 09:49:57,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:49:57,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59010290] [2023-02-15 09:49:57,409 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:49:57,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609771895] [2023-02-15 09:49:57,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609771895] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:49:57,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:49:57,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-15 09:49:57,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566296289] [2023-02-15 09:49:57,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:49:57,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 09:49:57,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:49:57,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 09:49:57,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 09:49:57,411 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 09:49:57,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:49:57,496 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2023-02-15 09:49:57,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 09:49:57,496 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-02-15 09:49:57,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:49:57,497 INFO L225 Difference]: With dead ends: 39 [2023-02-15 09:49:57,497 INFO L226 Difference]: Without dead ends: 35 [2023-02-15 09:49:57,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-02-15 09:49:57,498 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 31 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:49:57,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 81 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:49:57,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-15 09:49:57,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2023-02-15 09:49:57,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:49:57,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2023-02-15 09:49:57,503 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 31 [2023-02-15 09:49:57,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:49:57,503 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2023-02-15 09:49:57,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 09:49:57,504 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2023-02-15 09:49:57,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 09:49:57,505 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:49:57,505 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:49:57,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 09:49:57,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:49:57,713 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:49:57,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:49:57,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1236086951, now seen corresponding path program 4 times [2023-02-15 09:49:57,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:49:57,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530079358] [2023-02-15 09:49:57,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:49:57,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:49:57,735 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:49:57,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348079299] [2023-02-15 09:49:57,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 09:49:57,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:49:57,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:49:57,742 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) [2023-02-15 09:49:57,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 09:49:57,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 09:49:57,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:49:57,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 61 conjunts are in the unsatisfiable core [2023-02-15 09:49:57,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:49:57,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2023-02-15 09:49:57,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:49:57,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2023-02-15 09:49:57,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-02-15 09:49:57,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2023-02-15 09:49:58,437 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2023-02-15 09:49:58,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 63 [2023-02-15 09:49:58,754 INFO L321 Elim1Store]: treesize reduction 81, result has 45.6 percent of original size [2023-02-15 09:49:58,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 121 treesize of output 160 [2023-02-15 09:49:59,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:49:59,677 INFO L321 Elim1Store]: treesize reduction 196, result has 20.0 percent of original size [2023-02-15 09:49:59,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 2 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 146 treesize of output 126 [2023-02-15 09:49:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:49:59,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:50:02,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:50:02,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530079358] [2023-02-15 09:50:02,033 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:50:02,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348079299] [2023-02-15 09:50:02,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348079299] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:50:02,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:50:02,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-02-15 09:50:02,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828917710] [2023-02-15 09:50:02,033 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 09:50:02,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 09:50:02,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:50:02,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 09:50:02,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 09:50:02,035 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 21 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:50:03,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:50:03,209 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2023-02-15 09:50:03,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 09:50:03,212 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 21 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2023-02-15 09:50:03,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:50:03,213 INFO L225 Difference]: With dead ends: 74 [2023-02-15 09:50:03,213 INFO L226 Difference]: Without dead ends: 60 [2023-02-15 09:50:03,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=240, Invalid=1566, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 09:50:03,221 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 23 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 09:50:03,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 283 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 09:50:03,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-15 09:50:03,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2023-02-15 09:50:03,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:50:03,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2023-02-15 09:50:03,228 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 33 [2023-02-15 09:50:03,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:50:03,228 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2023-02-15 09:50:03,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 21 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:50:03,229 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2023-02-15 09:50:03,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 09:50:03,229 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:50:03,229 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:50:03,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 09:50:03,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:50:03,430 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:50:03,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:50:03,431 INFO L85 PathProgramCache]: Analyzing trace with hash -977921513, now seen corresponding path program 1 times [2023-02-15 09:50:03,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:50:03,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542269967] [2023-02-15 09:50:03,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:50:03,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:50:03,465 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:50:03,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238591911] [2023-02-15 09:50:03,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:50:03,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:50:03,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:50:03,471 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) [2023-02-15 09:50:03,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 09:50:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:50:03,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-15 09:50:03,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:50:03,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2023-02-15 09:50:03,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:03,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-15 09:50:03,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2023-02-15 09:50:03,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-02-15 09:50:03,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-02-15 09:50:03,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:03,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:03,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2023-02-15 09:50:04,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:04,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:04,027 INFO L321 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2023-02-15 09:50:04,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 68 [2023-02-15 09:50:04,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:04,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:04,184 INFO L321 Elim1Store]: treesize reduction 50, result has 36.7 percent of original size [2023-02-15 09:50:04,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 94 [2023-02-15 09:50:04,706 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:50:04,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 117 treesize of output 93 [2023-02-15 09:50:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:50:04,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:50:05,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:50:05,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542269967] [2023-02-15 09:50:05,999 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:50:06,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238591911] [2023-02-15 09:50:06,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238591911] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:50:06,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:50:06,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-02-15 09:50:06,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881452254] [2023-02-15 09:50:06,000 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 09:50:06,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-15 09:50:06,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:50:06,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 09:50:06,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2023-02-15 09:50:06,002 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:50:06,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:50:06,870 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2023-02-15 09:50:06,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 09:50:06,871 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2023-02-15 09:50:06,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:50:06,871 INFO L225 Difference]: With dead ends: 71 [2023-02-15 09:50:06,872 INFO L226 Difference]: Without dead ends: 67 [2023-02-15 09:50:06,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2023-02-15 09:50:06,873 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 31 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 09:50:06,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 149 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 09:50:06,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-15 09:50:06,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2023-02-15 09:50:06,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 09:50:06,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2023-02-15 09:50:06,883 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 33 [2023-02-15 09:50:06,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:50:06,883 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2023-02-15 09:50:06,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:50:06,883 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2023-02-15 09:50:06,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 09:50:06,884 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:50:06,884 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:50:06,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 09:50:07,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:50:07,089 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:50:07,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:50:07,090 INFO L85 PathProgramCache]: Analyzing trace with hash 868497529, now seen corresponding path program 2 times [2023-02-15 09:50:07,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:50:07,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957194432] [2023-02-15 09:50:07,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:50:07,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:50:07,104 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:50:07,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815498676] [2023-02-15 09:50:07,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:50:07,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:50:07,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:50:07,111 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) [2023-02-15 09:50:07,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 09:50:07,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:50:07,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:50:07,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 09:50:07,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:50:07,242 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:50:07,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:50:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 09:50:07,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:50:07,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957194432] [2023-02-15 09:50:07,299 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:50:07,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815498676] [2023-02-15 09:50:07,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815498676] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:50:07,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:50:07,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-02-15 09:50:07,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537112612] [2023-02-15 09:50:07,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:50:07,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 09:50:07,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:50:07,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 09:50:07,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-15 09:50:07,302 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 09:50:07,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:50:07,420 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2023-02-15 09:50:07,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 09:50:07,421 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-02-15 09:50:07,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:50:07,422 INFO L225 Difference]: With dead ends: 105 [2023-02-15 09:50:07,422 INFO L226 Difference]: Without dead ends: 93 [2023-02-15 09:50:07,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-02-15 09:50:07,423 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 75 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:50:07,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 117 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:50:07,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-02-15 09:50:07,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2023-02-15 09:50:07,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 65 states have internal predecessors, (75), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 09:50:07,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2023-02-15 09:50:07,439 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 35 [2023-02-15 09:50:07,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:50:07,439 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2023-02-15 09:50:07,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 09:50:07,440 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2023-02-15 09:50:07,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 09:50:07,440 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:50:07,440 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:50:07,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 09:50:07,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:50:07,646 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:50:07,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:50:07,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1373135831, now seen corresponding path program 5 times [2023-02-15 09:50:07,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:50:07,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206471682] [2023-02-15 09:50:07,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:50:07,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:50:07,661 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:50:07,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572182710] [2023-02-15 09:50:07,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 09:50:07,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:50:07,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:50:07,663 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) [2023-02-15 09:50:07,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 09:50:07,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-15 09:50:07,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:50:07,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 09:50:07,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:50:07,826 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:50:07,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:50:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 09:50:07,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:50:07,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206471682] [2023-02-15 09:50:07,882 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:50:07,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572182710] [2023-02-15 09:50:07,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572182710] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:50:07,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:50:07,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-02-15 09:50:07,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11708786] [2023-02-15 09:50:07,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:50:07,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 09:50:07,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:50:07,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 09:50:07,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-15 09:50:07,886 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 09:50:08,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:50:08,027 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2023-02-15 09:50:08,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 09:50:08,027 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-02-15 09:50:08,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:50:08,028 INFO L225 Difference]: With dead ends: 90 [2023-02-15 09:50:08,028 INFO L226 Difference]: Without dead ends: 86 [2023-02-15 09:50:08,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-02-15 09:50:08,029 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 57 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:50:08,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 122 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:50:08,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-15 09:50:08,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 65. [2023-02-15 09:50:08,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 09:50:08,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2023-02-15 09:50:08,040 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 35 [2023-02-15 09:50:08,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:50:08,040 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2023-02-15 09:50:08,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 09:50:08,041 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2023-02-15 09:50:08,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 09:50:08,041 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:50:08,042 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:50:08,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 09:50:08,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-02-15 09:50:08,247 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:50:08,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:50:08,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1081807417, now seen corresponding path program 6 times [2023-02-15 09:50:08,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:50:08,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527350089] [2023-02-15 09:50:08,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:50:08,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:50:08,261 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:50:08,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1346010459] [2023-02-15 09:50:08,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 09:50:08,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:50:08,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:50:08,263 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) [2023-02-15 09:50:08,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 09:50:08,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-15 09:50:08,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:50:08,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 76 conjunts are in the unsatisfiable core [2023-02-15 09:50:08,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:50:08,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2023-02-15 09:50:08,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:08,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-15 09:50:08,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-02-15 09:50:08,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-02-15 09:50:08,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2023-02-15 09:50:08,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:08,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:08,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:08,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:08,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2023-02-15 09:50:08,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:08,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:08,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:08,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:09,029 INFO L321 Elim1Store]: treesize reduction 46, result has 48.9 percent of original size [2023-02-15 09:50:09,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 98 [2023-02-15 09:50:09,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:09,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:09,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:09,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:09,282 INFO L321 Elim1Store]: treesize reduction 76, result has 49.3 percent of original size [2023-02-15 09:50:09,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 106 treesize of output 163 [2023-02-15 09:50:10,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:10,201 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:50:10,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:10,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 67 [2023-02-15 09:50:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:50:10,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:50:11,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:50:11,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527350089] [2023-02-15 09:50:11,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:50:11,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346010459] [2023-02-15 09:50:11,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346010459] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:50:11,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:50:11,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-02-15 09:50:11,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287149275] [2023-02-15 09:50:11,135 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 09:50:11,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 09:50:11,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:50:11,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 09:50:11,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 09:50:11,138 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:50:13,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:50:13,549 INFO L93 Difference]: Finished difference Result 121 states and 140 transitions. [2023-02-15 09:50:13,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-15 09:50:13,550 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2023-02-15 09:50:13,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:50:13,551 INFO L225 Difference]: With dead ends: 121 [2023-02-15 09:50:13,551 INFO L226 Difference]: Without dead ends: 117 [2023-02-15 09:50:13,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=515, Invalid=3025, Unknown=0, NotChecked=0, Total=3540 [2023-02-15 09:50:13,553 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 70 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 09:50:13,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 326 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 09:50:13,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-02-15 09:50:13,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 78. [2023-02-15 09:50:13,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 67 states have internal predecessors, (77), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 09:50:13,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2023-02-15 09:50:13,572 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 37 [2023-02-15 09:50:13,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:50:13,573 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2023-02-15 09:50:13,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:50:13,573 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2023-02-15 09:50:13,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 09:50:13,575 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:50:13,575 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:50:13,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 09:50:13,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 09:50:13,780 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:50:13,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:50:13,780 INFO L85 PathProgramCache]: Analyzing trace with hash 70690167, now seen corresponding path program 3 times [2023-02-15 09:50:13,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:50:13,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007843993] [2023-02-15 09:50:13,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:50:13,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:50:13,792 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:50:13,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973270040] [2023-02-15 09:50:13,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:50:13,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:50:13,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:50:13,794 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) [2023-02-15 09:50:13,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 09:50:13,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 09:50:13,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:50:13,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-15 09:50:13,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:50:13,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2023-02-15 09:50:13,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:13,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-15 09:50:13,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2023-02-15 09:50:13,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-02-15 09:50:13,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-02-15 09:50:13,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:13,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:13,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2023-02-15 09:50:14,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:14,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:14,107 INFO L321 Elim1Store]: treesize reduction 66, result has 43.6 percent of original size [2023-02-15 09:50:14,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 85 [2023-02-15 09:50:14,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:14,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:14,787 INFO L321 Elim1Store]: treesize reduction 80, result has 42.0 percent of original size [2023-02-15 09:50:14,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 70 treesize of output 114 [2023-02-15 09:50:15,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:15,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:15,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:15,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:15,120 INFO L321 Elim1Store]: treesize reduction 114, result has 39.0 percent of original size [2023-02-15 09:50:15,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 5 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 130 treesize of output 188 [2023-02-15 09:50:19,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:19,778 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:50:19,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:50:20,118 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:50:20,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 4 disjoint index pairs (out of 120 index pairs), introduced 14 new quantified variables, introduced 44 case distinctions, treesize of input 296 treesize of output 684 [2023-02-15 09:51:07,577 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-15 09:51:07,919 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-15 09:51:12,495 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-15 09:51:13,122 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-15 09:51:13,792 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-02-15 09:51:14,563 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-02-15 09:51:18,659 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-15 09:51:18,973 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-15 09:52:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:52:04,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:52:07,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:52:07,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007843993] [2023-02-15 09:52:07,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:52:07,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973270040] [2023-02-15 09:52:07,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973270040] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:52:07,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:52:07,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-02-15 09:52:07,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978390550] [2023-02-15 09:52:07,832 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 09:52:07,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 09:52:07,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:52:07,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 09:52:07,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1357, Unknown=1, NotChecked=0, Total=1560 [2023-02-15 09:52:07,833 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 24 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:52:10,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:52:10,816 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2023-02-15 09:52:10,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 09:52:10,816 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 24 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2023-02-15 09:52:10,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:52:10,817 INFO L225 Difference]: With dead ends: 100 [2023-02-15 09:52:10,817 INFO L226 Difference]: Without dead ends: 96 [2023-02-15 09:52:10,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=362, Invalid=2289, Unknown=1, NotChecked=0, Total=2652 [2023-02-15 09:52:10,818 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 09:52:10,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 321 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 09:52:10,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-02-15 09:52:10,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2023-02-15 09:52:10,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 67 states have internal predecessors, (77), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 09:52:10,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2023-02-15 09:52:10,837 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 37 [2023-02-15 09:52:10,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:52:10,837 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2023-02-15 09:52:10,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 24 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:52:10,838 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2023-02-15 09:52:10,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 09:52:10,838 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:52:10,839 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:52:10,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 09:52:11,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-15 09:52:11,045 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:52:11,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:52:11,045 INFO L85 PathProgramCache]: Analyzing trace with hash 288075803, now seen corresponding path program 7 times [2023-02-15 09:52:11,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:52:11,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843933516] [2023-02-15 09:52:11,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:52:11,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:52:11,073 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:52:11,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1184583538] [2023-02-15 09:52:11,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 09:52:11,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:52:11,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:52:11,088 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) [2023-02-15 09:52:11,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 09:52:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:52:11,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 09:52:11,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:52:11,260 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:52:11,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:52:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 09:52:11,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:52:11,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843933516] [2023-02-15 09:52:11,327 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:52:11,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184583538] [2023-02-15 09:52:11,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184583538] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:52:11,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:52:11,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-02-15 09:52:11,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961663206] [2023-02-15 09:52:11,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:52:11,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 09:52:11,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:52:11,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 09:52:11,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-02-15 09:52:11,329 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 09:52:11,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:52:11,537 INFO L93 Difference]: Finished difference Result 144 states and 157 transitions. [2023-02-15 09:52:11,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 09:52:11,537 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2023-02-15 09:52:11,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:52:11,538 INFO L225 Difference]: With dead ends: 144 [2023-02-15 09:52:11,538 INFO L226 Difference]: Without dead ends: 130 [2023-02-15 09:52:11,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2023-02-15 09:52:11,539 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 88 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:52:11,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 171 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:52:11,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-02-15 09:52:11,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2023-02-15 09:52:11,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 89 states have internal predecessors, (103), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 09:52:11,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2023-02-15 09:52:11,562 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 39 [2023-02-15 09:52:11,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:52:11,562 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2023-02-15 09:52:11,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 09:52:11,562 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2023-02-15 09:52:11,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 09:52:11,563 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:52:11,563 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:52:11,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-15 09:52:11,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 09:52:11,767 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:52:11,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:52:11,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1485008409, now seen corresponding path program 8 times [2023-02-15 09:52:11,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:52:11,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251453081] [2023-02-15 09:52:11,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:52:11,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:52:11,779 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:52:11,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989897225] [2023-02-15 09:52:11,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:52:11,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:52:11,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:52:11,781 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) [2023-02-15 09:52:11,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 09:52:11,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:52:11,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:52:11,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 90 conjunts are in the unsatisfiable core [2023-02-15 09:52:11,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:52:11,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2023-02-15 09:52:11,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:11,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-15 09:52:11,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2023-02-15 09:52:11,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-02-15 09:52:11,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-02-15 09:52:12,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2023-02-15 09:52:12,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2023-02-15 09:52:12,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 87 [2023-02-15 09:52:12,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,742 INFO L321 Elim1Store]: treesize reduction 62, result has 48.8 percent of original size [2023-02-15 09:52:12,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 84 treesize of output 128 [2023-02-15 09:52:12,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:12,977 INFO L321 Elim1Store]: treesize reduction 166, result has 17.4 percent of original size [2023-02-15 09:52:12,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 13 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 127 treesize of output 142 [2023-02-15 09:52:14,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 72 [2023-02-15 09:52:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:52:14,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:52:16,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:52:16,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251453081] [2023-02-15 09:52:16,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:52:16,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989897225] [2023-02-15 09:52:16,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989897225] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:52:16,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:52:16,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-02-15 09:52:16,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765702891] [2023-02-15 09:52:16,542 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 09:52:16,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 09:52:16,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:52:16,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 09:52:16,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1290, Unknown=0, NotChecked=0, Total=1482 [2023-02-15 09:52:16,544 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:52:17,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:52:17,835 INFO L93 Difference]: Finished difference Result 125 states and 140 transitions. [2023-02-15 09:52:17,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 09:52:17,835 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2023-02-15 09:52:17,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:52:17,836 INFO L225 Difference]: With dead ends: 125 [2023-02-15 09:52:17,836 INFO L226 Difference]: Without dead ends: 121 [2023-02-15 09:52:17,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=276, Invalid=1980, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 09:52:17,837 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 41 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 09:52:17,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 346 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 09:52:17,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-15 09:52:17,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 109. [2023-02-15 09:52:17,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 94 states have (on average 1.1595744680851063) internal successors, (109), 94 states have internal predecessors, (109), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 09:52:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 123 transitions. [2023-02-15 09:52:17,858 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 123 transitions. Word has length 41 [2023-02-15 09:52:17,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:52:17,859 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 123 transitions. [2023-02-15 09:52:17,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:52:17,859 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 123 transitions. [2023-02-15 09:52:17,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 09:52:17,860 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:52:17,860 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:52:17,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 09:52:18,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 09:52:18,061 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:52:18,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:52:18,061 INFO L85 PathProgramCache]: Analyzing trace with hash 463940055, now seen corresponding path program 4 times [2023-02-15 09:52:18,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:52:18,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839998720] [2023-02-15 09:52:18,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:52:18,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:52:18,071 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:52:18,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365682342] [2023-02-15 09:52:18,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 09:52:18,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:52:18,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:52:18,074 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) [2023-02-15 09:52:18,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 09:52:18,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 09:52:18,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:52:18,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 89 conjunts are in the unsatisfiable core [2023-02-15 09:52:18,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:52:18,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2023-02-15 09:52:18,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:18,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-15 09:52:18,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2023-02-15 09:52:18,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-02-15 09:52:18,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-02-15 09:52:18,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2023-02-15 09:52:18,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:18,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:18,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:18,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:18,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:18,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:18,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2023-02-15 09:52:18,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:18,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:18,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:18,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:18,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:18,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:18,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 87 [2023-02-15 09:52:18,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:18,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:18,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:18,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:18,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:18,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:19,038 INFO L321 Elim1Store]: treesize reduction 62, result has 48.8 percent of original size [2023-02-15 09:52:19,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 84 treesize of output 128 [2023-02-15 09:52:19,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:19,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:19,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:19,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:19,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:19,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:19,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:19,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:19,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:19,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:19,319 INFO L321 Elim1Store]: treesize reduction 68, result has 36.4 percent of original size [2023-02-15 09:52:19,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 17 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 4 case distinctions, treesize of input 121 treesize of output 164 [2023-02-15 09:52:24,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:24,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:24,236 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:52:24,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:24,275 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:52:24,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 7 disjoint index pairs (out of 66 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 215 treesize of output 215 [2023-02-15 09:52:25,234 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:52:25,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:52:32,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:52:32,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839998720] [2023-02-15 09:52:32,335 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:52:32,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365682342] [2023-02-15 09:52:32,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365682342] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:52:32,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:52:32,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-02-15 09:52:32,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622684113] [2023-02-15 09:52:32,336 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 09:52:32,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-15 09:52:32,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:52:32,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-15 09:52:32,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1503, Unknown=3, NotChecked=0, Total=1722 [2023-02-15 09:52:32,337 INFO L87 Difference]: Start difference. First operand 109 states and 123 transitions. Second operand has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 26 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:52:36,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:52:36,647 INFO L93 Difference]: Finished difference Result 127 states and 142 transitions. [2023-02-15 09:52:36,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-15 09:52:36,647 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 26 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2023-02-15 09:52:36,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:52:36,648 INFO L225 Difference]: With dead ends: 127 [2023-02-15 09:52:36,648 INFO L226 Difference]: Without dead ends: 123 [2023-02-15 09:52:36,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=349, Invalid=2197, Unknown=4, NotChecked=0, Total=2550 [2023-02-15 09:52:36,649 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 26 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 09:52:36,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 366 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 09:52:36,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-02-15 09:52:36,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 106. [2023-02-15 09:52:36,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 91 states have internal predecessors, (105), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 09:52:36,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2023-02-15 09:52:36,676 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 41 [2023-02-15 09:52:36,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:52:36,676 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2023-02-15 09:52:36,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 26 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:52:36,677 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2023-02-15 09:52:36,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 09:52:36,677 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:52:36,677 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:52:36,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 09:52:36,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-15 09:52:36,884 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:52:36,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:52:36,884 INFO L85 PathProgramCache]: Analyzing trace with hash -2111753712, now seen corresponding path program 1 times [2023-02-15 09:52:36,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:52:36,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500464028] [2023-02-15 09:52:36,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:52:36,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:52:36,894 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:52:36,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808842765] [2023-02-15 09:52:36,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:52:36,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:52:36,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:52:36,896 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) [2023-02-15 09:52:36,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 09:52:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:52:36,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 79 conjunts are in the unsatisfiable core [2023-02-15 09:52:36,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:52:37,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2023-02-15 09:52:37,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:37,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2023-02-15 09:52:37,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-02-15 09:52:37,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:37,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2023-02-15 09:52:37,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:37,466 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 09:52:37,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 52 [2023-02-15 09:52:37,622 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:52:37,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:37,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2023-02-15 09:52:37,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:37,803 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 09:52:37,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 52 [2023-02-15 09:52:37,956 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:52:37,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:37,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:37,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2023-02-15 09:52:38,263 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:52:38,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:38,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 20 [2023-02-15 09:52:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 09:52:38,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:52:38,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:52:38,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500464028] [2023-02-15 09:52:38,912 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:52:38,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808842765] [2023-02-15 09:52:38,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808842765] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:52:38,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:52:38,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-02-15 09:52:38,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792231748] [2023-02-15 09:52:38,913 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 09:52:38,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 09:52:38,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:52:38,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 09:52:38,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 09:52:38,914 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:52:40,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:52:40,133 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2023-02-15 09:52:40,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-15 09:52:40,133 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2023-02-15 09:52:40,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:52:40,134 INFO L225 Difference]: With dead ends: 130 [2023-02-15 09:52:40,134 INFO L226 Difference]: Without dead ends: 120 [2023-02-15 09:52:40,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=381, Invalid=2069, Unknown=0, NotChecked=0, Total=2450 [2023-02-15 09:52:40,135 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 62 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 09:52:40,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 211 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 09:52:40,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-02-15 09:52:40,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2023-02-15 09:52:40,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 99 states have (on average 1.1515151515151516) internal successors, (114), 99 states have internal predecessors, (114), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 09:52:40,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 130 transitions. [2023-02-15 09:52:40,158 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 130 transitions. Word has length 43 [2023-02-15 09:52:40,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:52:40,158 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 130 transitions. [2023-02-15 09:52:40,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:52:40,158 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 130 transitions. [2023-02-15 09:52:40,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 09:52:40,158 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:52:40,159 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:52:40,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 09:52:40,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:52:40,361 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:52:40,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:52:40,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1853588274, now seen corresponding path program 1 times [2023-02-15 09:52:40,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:52:40,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509697280] [2023-02-15 09:52:40,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:52:40,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:52:40,371 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:52:40,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633383833] [2023-02-15 09:52:40,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:52:40,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:52:40,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:52:40,373 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) [2023-02-15 09:52:40,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 09:52:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:52:40,490 WARN L261 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 91 conjunts are in the unsatisfiable core [2023-02-15 09:52:40,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:52:40,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2023-02-15 09:52:40,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:40,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2023-02-15 09:52:40,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-02-15 09:52:40,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2023-02-15 09:52:40,950 INFO L321 Elim1Store]: treesize reduction 20, result has 42.9 percent of original size [2023-02-15 09:52:40,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 43 [2023-02-15 09:52:41,128 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:52:41,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:41,153 INFO L321 Elim1Store]: treesize reduction 144, result has 14.3 percent of original size [2023-02-15 09:52:41,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 54 treesize of output 47 [2023-02-15 09:52:41,494 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:52:41,546 INFO L321 Elim1Store]: treesize reduction 127, result has 25.7 percent of original size [2023-02-15 09:52:41,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 70 [2023-02-15 09:52:41,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:41,729 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:52:41,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:41,731 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:52:41,739 INFO L321 Elim1Store]: treesize reduction 34, result has 29.2 percent of original size [2023-02-15 09:52:41,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 62 [2023-02-15 09:52:42,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:42,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:42,104 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:52:42,104 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:52:42,124 INFO L321 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2023-02-15 09:52:42,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 70 treesize of output 38 [2023-02-15 09:52:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:52:42,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:52:42,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:52:42,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509697280] [2023-02-15 09:52:42,686 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:52:42,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633383833] [2023-02-15 09:52:42,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633383833] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:52:42,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:52:42,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2023-02-15 09:52:42,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075250812] [2023-02-15 09:52:42,687 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 09:52:42,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 09:52:42,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:52:42,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 09:52:42,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 09:52:42,688 INFO L87 Difference]: Start difference. First operand 116 states and 130 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:52:44,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:52:44,103 INFO L93 Difference]: Finished difference Result 133 states and 149 transitions. [2023-02-15 09:52:44,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 09:52:44,103 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2023-02-15 09:52:44,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:52:44,104 INFO L225 Difference]: With dead ends: 133 [2023-02-15 09:52:44,104 INFO L226 Difference]: Without dead ends: 123 [2023-02-15 09:52:44,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=340, Invalid=2416, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 09:52:44,106 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 51 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 09:52:44,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 262 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 09:52:44,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-02-15 09:52:44,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 108. [2023-02-15 09:52:44,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 93 states have (on average 1.1505376344086022) internal successors, (107), 93 states have internal predecessors, (107), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 09:52:44,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 121 transitions. [2023-02-15 09:52:44,129 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 121 transitions. Word has length 43 [2023-02-15 09:52:44,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:52:44,130 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 121 transitions. [2023-02-15 09:52:44,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:52:44,130 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 121 transitions. [2023-02-15 09:52:44,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 09:52:44,130 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:52:44,130 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:52:44,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 09:52:44,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-15 09:52:44,331 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:52:44,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:52:44,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1892898994, now seen corresponding path program 2 times [2023-02-15 09:52:44,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:52:44,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655157284] [2023-02-15 09:52:44,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:52:44,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:52:44,342 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:52:44,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683955900] [2023-02-15 09:52:44,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:52:44,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:52:44,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:52:44,344 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) [2023-02-15 09:52:44,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 09:52:44,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:52:44,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:52:44,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 81 conjunts are in the unsatisfiable core [2023-02-15 09:52:44,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:52:44,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2023-02-15 09:52:44,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:44,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2023-02-15 09:52:44,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-02-15 09:52:44,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2023-02-15 09:52:44,962 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 09:52:44,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 40 [2023-02-15 09:52:45,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:45,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2023-02-15 09:52:45,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:45,619 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2023-02-15 09:52:45,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 70 [2023-02-15 09:52:45,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:45,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:45,835 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:52:45,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:45,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 65 [2023-02-15 09:52:46,662 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:52:46,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:46,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:46,664 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:52:46,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 22 [2023-02-15 09:52:46,740 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:52:46,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:52:47,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:52:47,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655157284] [2023-02-15 09:52:47,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:52:47,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683955900] [2023-02-15 09:52:47,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683955900] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:52:47,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:52:47,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2023-02-15 09:52:47,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019450259] [2023-02-15 09:52:47,246 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 09:52:47,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 09:52:47,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:52:47,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 09:52:47,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 09:52:47,247 INFO L87 Difference]: Start difference. First operand 108 states and 121 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:52:49,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:52:49,565 INFO L93 Difference]: Finished difference Result 160 states and 178 transitions. [2023-02-15 09:52:49,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-15 09:52:49,565 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2023-02-15 09:52:49,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:52:49,566 INFO L225 Difference]: With dead ends: 160 [2023-02-15 09:52:49,566 INFO L226 Difference]: Without dead ends: 140 [2023-02-15 09:52:49,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=476, Invalid=3064, Unknown=0, NotChecked=0, Total=3540 [2023-02-15 09:52:49,567 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 69 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 09:52:49,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 397 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 09:52:49,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-15 09:52:49,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 128. [2023-02-15 09:52:49,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 109 states have (on average 1.146788990825688) internal successors, (125), 109 states have internal predecessors, (125), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 09:52:49,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 143 transitions. [2023-02-15 09:52:49,596 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 143 transitions. Word has length 43 [2023-02-15 09:52:49,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:52:49,596 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 143 transitions. [2023-02-15 09:52:49,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:52:49,596 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 143 transitions. [2023-02-15 09:52:49,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 09:52:49,597 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:52:49,597 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:52:49,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 09:52:49,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-15 09:52:49,799 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:52:49,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:52:49,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1634733556, now seen corresponding path program 1 times [2023-02-15 09:52:49,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:52:49,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561673548] [2023-02-15 09:52:49,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:52:49,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:52:49,808 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:52:49,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916507287] [2023-02-15 09:52:49,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:52:49,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:52:49,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:52:49,810 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) [2023-02-15 09:52:49,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 09:52:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:52:49,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-15 09:52:49,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:52:49,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2023-02-15 09:52:49,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:49,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-15 09:52:49,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2023-02-15 09:52:49,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-02-15 09:52:49,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-02-15 09:52:50,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:50,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:50,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2023-02-15 09:52:50,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:50,413 INFO L321 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2023-02-15 09:52:50,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 56 [2023-02-15 09:52:50,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:50,614 INFO L321 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2023-02-15 09:52:50,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 79 [2023-02-15 09:52:51,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:51,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:51,231 INFO L321 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2023-02-15 09:52:51,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 90 [2023-02-15 09:52:51,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:51,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:51,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:51,512 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:52:51,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 68 [2023-02-15 09:52:52,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:52,041 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:52:52,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 32 [2023-02-15 09:52:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:52:52,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:52:55,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:52:55,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561673548] [2023-02-15 09:52:55,476 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:52:55,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916507287] [2023-02-15 09:52:55,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916507287] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:52:55,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:52:55,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2023-02-15 09:52:55,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057723703] [2023-02-15 09:52:55,476 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 09:52:55,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 09:52:55,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:52:55,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 09:52:55,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1432, Unknown=1, NotChecked=0, Total=1640 [2023-02-15 09:52:55,477 INFO L87 Difference]: Start difference. First operand 128 states and 143 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:52:57,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:52:57,062 INFO L93 Difference]: Finished difference Result 153 states and 169 transitions. [2023-02-15 09:52:57,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 09:52:57,062 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2023-02-15 09:52:57,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:52:57,063 INFO L225 Difference]: With dead ends: 153 [2023-02-15 09:52:57,063 INFO L226 Difference]: Without dead ends: 143 [2023-02-15 09:52:57,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=371, Invalid=2708, Unknown=1, NotChecked=0, Total=3080 [2023-02-15 09:52:57,064 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 58 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 09:52:57,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 280 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 09:52:57,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-02-15 09:52:57,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 138. [2023-02-15 09:52:57,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 117 states have internal predecessors, (133), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 09:52:57,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 153 transitions. [2023-02-15 09:52:57,095 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 153 transitions. Word has length 43 [2023-02-15 09:52:57,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:52:57,095 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 153 transitions. [2023-02-15 09:52:57,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:52:57,096 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 153 transitions. [2023-02-15 09:52:57,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 09:52:57,096 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:52:57,097 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:52:57,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 09:52:57,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-15 09:52:57,300 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:52:57,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:52:57,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1217172475, now seen corresponding path program 9 times [2023-02-15 09:52:57,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:52:57,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563269946] [2023-02-15 09:52:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:52:57,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:52:57,312 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:52:57,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748946816] [2023-02-15 09:52:57,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:52:57,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:52:57,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:52:57,314 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:52:57,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 09:52:57,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 09:52:57,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:52:57,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 09:52:57,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:52:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:52:57,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:52:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 09:52:57,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:52:57,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563269946] [2023-02-15 09:52:57,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:52:57,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748946816] [2023-02-15 09:52:57,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748946816] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:52:57,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:52:57,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-02-15 09:52:57,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35126802] [2023-02-15 09:52:57,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:52:57,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 09:52:57,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:52:57,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 09:52:57,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-02-15 09:52:57,618 INFO L87 Difference]: Start difference. First operand 138 states and 153 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 09:52:57,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:52:57,933 INFO L93 Difference]: Finished difference Result 223 states and 242 transitions. [2023-02-15 09:52:57,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 09:52:57,933 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2023-02-15 09:52:57,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:52:57,934 INFO L225 Difference]: With dead ends: 223 [2023-02-15 09:52:57,934 INFO L226 Difference]: Without dead ends: 207 [2023-02-15 09:52:57,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=281, Invalid=775, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 09:52:57,936 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 188 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:52:57,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 173 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:52:57,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-02-15 09:52:57,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 169. [2023-02-15 09:52:57,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 144 states have (on average 1.1458333333333333) internal successors, (165), 144 states have internal predecessors, (165), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-15 09:52:57,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 189 transitions. [2023-02-15 09:52:57,982 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 189 transitions. Word has length 43 [2023-02-15 09:52:57,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:52:57,983 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 189 transitions. [2023-02-15 09:52:57,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 09:52:57,983 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 189 transitions. [2023-02-15 09:52:57,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 09:52:57,983 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:52:57,983 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:52:57,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-15 09:52:58,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:52:58,190 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:52:58,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:52:58,190 INFO L85 PathProgramCache]: Analyzing trace with hash -2118573319, now seen corresponding path program 10 times [2023-02-15 09:52:58,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:52:58,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698128705] [2023-02-15 09:52:58,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:52:58,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:52:58,210 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:52:58,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002173607] [2023-02-15 09:52:58,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 09:52:58,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:52:58,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:52:58,211 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:52:58,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 09:52:58,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 09:52:58,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:52:58,364 WARN L261 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 109 conjunts are in the unsatisfiable core [2023-02-15 09:52:58,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:52:58,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2023-02-15 09:52:58,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:58,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-15 09:52:58,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-02-15 09:52:58,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-02-15 09:52:58,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:58,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:58,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2023-02-15 09:52:58,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:58,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:58,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:58,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:58,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 73 [2023-02-15 09:52:58,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:58,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:58,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:58,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:58,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:58,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:58,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:58,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:58,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:58,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:58,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 91 [2023-02-15 09:52:58,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:58,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:58,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:58,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:58,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:58,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:58,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:58,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:58,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 111 [2023-02-15 09:52:59,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:59,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:59,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:59,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:59,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:59,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:59,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:59,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:59,375 INFO L321 Elim1Store]: treesize reduction 78, result has 48.7 percent of original size [2023-02-15 09:52:59,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 5 case distinctions, treesize of input 102 treesize of output 158 [2023-02-15 09:52:59,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:59,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:59,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:59,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:59,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:59,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:59,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:59,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:52:59,742 INFO L321 Elim1Store]: treesize reduction 128, result has 49.2 percent of original size [2023-02-15 09:52:59,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 15 case distinctions, treesize of input 154 treesize of output 255 [2023-02-15 09:53:02,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:02,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:02,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:02,998 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:53:02,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 11 disjoint index pairs (out of 66 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 378 treesize of output 158 [2023-02-15 09:53:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:53:03,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:53:05,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:53:05,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698128705] [2023-02-15 09:53:05,442 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:53:05,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002173607] [2023-02-15 09:53:05,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002173607] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:53:05,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:53:05,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2023-02-15 09:53:05,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437074013] [2023-02-15 09:53:05,443 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 09:53:05,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 09:53:05,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:53:05,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 09:53:05,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=2168, Unknown=0, NotChecked=0, Total=2450 [2023-02-15 09:53:05,446 INFO L87 Difference]: Start difference. First operand 169 states and 189 transitions. Second operand has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 31 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:53:10,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:53:10,653 INFO L93 Difference]: Finished difference Result 228 states and 260 transitions. [2023-02-15 09:53:10,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-15 09:53:10,653 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 31 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2023-02-15 09:53:10,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:53:10,654 INFO L225 Difference]: With dead ends: 228 [2023-02-15 09:53:10,654 INFO L226 Difference]: Without dead ends: 224 [2023-02-15 09:53:10,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=722, Invalid=4680, Unknown=0, NotChecked=0, Total=5402 [2023-02-15 09:53:10,656 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 75 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 09:53:10,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 346 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-15 09:53:10,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-02-15 09:53:10,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 174. [2023-02-15 09:53:10,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 149 states have (on average 1.1476510067114094) internal successors, (171), 149 states have internal predecessors, (171), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-15 09:53:10,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 195 transitions. [2023-02-15 09:53:10,697 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 195 transitions. Word has length 45 [2023-02-15 09:53:10,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:53:10,697 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 195 transitions. [2023-02-15 09:53:10,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 31 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:53:10,698 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 195 transitions. [2023-02-15 09:53:10,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 09:53:10,698 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:53:10,698 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:53:10,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-15 09:53:10,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:53:10,899 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:53:10,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:53:10,899 INFO L85 PathProgramCache]: Analyzing trace with hash 182249271, now seen corresponding path program 5 times [2023-02-15 09:53:10,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:53:10,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225878514] [2023-02-15 09:53:10,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:53:10,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:53:10,910 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:53:10,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659608602] [2023-02-15 09:53:10,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 09:53:10,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:53:10,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:53:10,912 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:53:10,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 09:53:11,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-15 09:53:11,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:53:11,064 WARN L261 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 105 conjunts are in the unsatisfiable core [2023-02-15 09:53:11,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:53:11,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 16 [2023-02-15 09:53:11,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-15 09:53:11,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2023-02-15 09:53:11,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-02-15 09:53:11,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-02-15 09:53:11,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2023-02-15 09:53:11,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 61 [2023-02-15 09:53:11,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2023-02-15 09:53:11,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2023-02-15 09:53:11,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2023-02-15 09:53:11,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 91 [2023-02-15 09:53:11,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:11,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 111 [2023-02-15 09:53:12,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:12,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:12,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:12,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:12,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:12,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:12,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:12,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:12,274 INFO L321 Elim1Store]: treesize reduction 78, result has 48.7 percent of original size [2023-02-15 09:53:12,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 5 case distinctions, treesize of input 102 treesize of output 158 [2023-02-15 09:53:12,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:12,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:12,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:12,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:12,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:12,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:12,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:12,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:12,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:12,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:12,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:12,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:12,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:12,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:12,593 INFO L321 Elim1Store]: treesize reduction 68, result has 36.4 percent of original size [2023-02-15 09:53:12,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 27 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 4 case distinctions, treesize of input 139 treesize of output 188 [2023-02-15 09:53:14,717 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:53:14,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 11 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 10 case distinctions, treesize of input 221 treesize of output 241 [2023-02-15 09:53:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:53:15,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:53:17,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:53:17,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225878514] [2023-02-15 09:53:17,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:53:17,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659608602] [2023-02-15 09:53:17,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659608602] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:53:17,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:53:17,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2023-02-15 09:53:17,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709888157] [2023-02-15 09:53:17,769 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 09:53:17,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 09:53:17,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:53:17,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 09:53:17,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=2146, Unknown=0, NotChecked=0, Total=2450 [2023-02-15 09:53:17,770 INFO L87 Difference]: Start difference. First operand 174 states and 195 transitions. Second operand has 34 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 31 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:53:20,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:53:20,581 INFO L93 Difference]: Finished difference Result 194 states and 216 transitions. [2023-02-15 09:53:20,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-15 09:53:20,581 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 31 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2023-02-15 09:53:20,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:53:20,582 INFO L225 Difference]: With dead ends: 194 [2023-02-15 09:53:20,582 INFO L226 Difference]: Without dead ends: 190 [2023-02-15 09:53:20,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=499, Invalid=3407, Unknown=0, NotChecked=0, Total=3906 [2023-02-15 09:53:20,584 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 60 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-15 09:53:20,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 362 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-15 09:53:20,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-02-15 09:53:20,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 171. [2023-02-15 09:53:20,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 146 states have (on average 1.143835616438356) internal successors, (167), 146 states have internal predecessors, (167), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-15 09:53:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 191 transitions. [2023-02-15 09:53:20,632 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 191 transitions. Word has length 45 [2023-02-15 09:53:20,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:53:20,632 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 191 transitions. [2023-02-15 09:53:20,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 31 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:53:20,633 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 191 transitions. [2023-02-15 09:53:20,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 09:53:20,633 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:53:20,633 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:53:20,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-15 09:53:20,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-02-15 09:53:20,836 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:53:20,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:53:20,836 INFO L85 PathProgramCache]: Analyzing trace with hash 571342256, now seen corresponding path program 2 times [2023-02-15 09:53:20,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:53:20,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66969188] [2023-02-15 09:53:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:53:20,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:53:20,851 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:53:20,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728777225] [2023-02-15 09:53:20,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:53:20,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:53:20,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:53:20,853 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:53:20,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-15 09:53:21,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:53:21,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:53:21,057 WARN L261 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 103 conjunts are in the unsatisfiable core [2023-02-15 09:53:21,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:53:21,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2023-02-15 09:53:21,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:21,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-15 09:53:21,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-02-15 09:53:21,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-02-15 09:53:21,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:21,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:21,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2023-02-15 09:53:21,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:21,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:21,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:21,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:21,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 73 [2023-02-15 09:53:21,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:21,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:21,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:21,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:21,895 INFO L321 Elim1Store]: treesize reduction 46, result has 48.9 percent of original size [2023-02-15 09:53:21,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 98 [2023-02-15 09:53:22,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:22,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:22,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:22,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:22,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:22,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:22,197 INFO L321 Elim1Store]: treesize reduction 50, result has 49.5 percent of original size [2023-02-15 09:53:22,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 144 [2023-02-15 09:53:22,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:22,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:22,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:22,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:23,008 INFO L321 Elim1Store]: treesize reduction 46, result has 48.9 percent of original size [2023-02-15 09:53:23,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 107 [2023-02-15 09:53:23,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:23,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:23,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:23,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:23,378 INFO L321 Elim1Store]: treesize reduction 124, result has 17.3 percent of original size [2023-02-15 09:53:23,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 109 treesize of output 110 [2023-02-15 09:53:23,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 28 [2023-02-15 09:53:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:53:23,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:53:24,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:53:24,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66969188] [2023-02-15 09:53:24,584 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:53:24,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728777225] [2023-02-15 09:53:24,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728777225] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:53:24,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:53:24,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2023-02-15 09:53:24,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607211530] [2023-02-15 09:53:24,584 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 09:53:24,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-15 09:53:24,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:53:24,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-15 09:53:24,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1888, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 09:53:24,586 INFO L87 Difference]: Start difference. First operand 171 states and 191 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 30 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:53:26,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:53:26,212 INFO L93 Difference]: Finished difference Result 199 states and 221 transitions. [2023-02-15 09:53:26,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-15 09:53:26,212 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 30 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2023-02-15 09:53:26,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:53:26,213 INFO L225 Difference]: With dead ends: 199 [2023-02-15 09:53:26,213 INFO L226 Difference]: Without dead ends: 187 [2023-02-15 09:53:26,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=457, Invalid=3083, Unknown=0, NotChecked=0, Total=3540 [2023-02-15 09:53:26,214 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 55 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 09:53:26,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 313 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 09:53:26,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-02-15 09:53:26,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 181. [2023-02-15 09:53:26,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 154 states have (on average 1.1428571428571428) internal successors, (176), 154 states have internal predecessors, (176), 13 states have call successors, (13), 13 states have call predecessors, (13), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 09:53:26,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 202 transitions. [2023-02-15 09:53:26,276 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 202 transitions. Word has length 47 [2023-02-15 09:53:26,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:53:26,277 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 202 transitions. [2023-02-15 09:53:26,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 30 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:53:26,277 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 202 transitions. [2023-02-15 09:53:26,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 09:53:26,278 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:53:26,278 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:53:26,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-15 09:53:26,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-02-15 09:53:26,479 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:53:26,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:53:26,479 INFO L85 PathProgramCache]: Analyzing trace with hash -439774994, now seen corresponding path program 3 times [2023-02-15 09:53:26,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:53:26,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134956462] [2023-02-15 09:53:26,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:53:26,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:53:26,489 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:53:26,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583183108] [2023-02-15 09:53:26,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:53:26,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:53:26,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:53:26,491 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:53:26,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-15 09:53:26,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 09:53:26,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:53:26,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 88 conjunts are in the unsatisfiable core [2023-02-15 09:53:26,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:53:26,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2023-02-15 09:53:26,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:26,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-15 09:53:26,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-02-15 09:53:26,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-02-15 09:53:26,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:26,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2023-02-15 09:53:26,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:26,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2023-02-15 09:53:26,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:26,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2023-02-15 09:53:26,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:26,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 50 [2023-02-15 09:53:26,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-02-15 09:53:26,846 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2023-02-15 09:53:26,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2023-02-15 09:53:26,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:26,875 INFO L321 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2023-02-15 09:53:26,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 36 [2023-02-15 09:53:27,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:28,013 INFO L321 Elim1Store]: treesize reduction 66, result has 33.3 percent of original size [2023-02-15 09:53:28,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 88 [2023-02-15 09:53:28,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:28,318 INFO L321 Elim1Store]: treesize reduction 164, result has 15.5 percent of original size [2023-02-15 09:53:28,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 118 treesize of output 116 [2023-02-15 09:53:36,773 WARN L233 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 09:53:49,083 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 09:53:49,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:49,534 INFO L321 Elim1Store]: treesize reduction 110, result has 43.3 percent of original size [2023-02-15 09:53:49,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 125 treesize of output 192 [2023-02-15 09:53:50,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:50,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:50,791 INFO L321 Elim1Store]: treesize reduction 194, result has 28.9 percent of original size [2023-02-15 09:53:50,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 16 case distinctions, treesize of input 174 treesize of output 223 [2023-02-15 09:53:52,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:52,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:53,668 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:53:53,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 4 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 66 case distinctions, treesize of input 317 treesize of output 1101 [2023-02-15 09:53:55,626 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-15 09:53:56,295 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-02-15 09:53:57,155 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-02-15 09:53:58,953 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts.