./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-multidimensional/init-4-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-multidimensional/init-4-n-u.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 7e1c46a3eec085decec4254bf9381483b25ba7b6541d5728ae52d1793b9b8c91 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 10:15:47,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 10:15:47,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 10:15:47,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 10:15:47,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 10:15:47,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 10:15:47,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 10:15:47,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 10:15:47,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 10:15:47,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 10:15:47,267 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 10:15:47,269 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 10:15:47,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 10:15:47,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 10:15:47,271 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 10:15:47,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 10:15:47,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 10:15:47,275 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 10:15:47,276 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 10:15:47,280 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 10:15:47,282 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 10:15:47,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 10:15:47,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 10:15:47,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 10:15:47,285 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 10:15:47,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 10:15:47,290 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 10:15:47,291 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 10:15:47,292 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 10:15:47,292 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 10:15:47,293 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 10:15:47,293 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 10:15:47,294 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 10:15:47,295 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 10:15:47,295 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 10:15:47,296 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 10:15:47,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 10:15:47,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 10:15:47,296 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 10:15:47,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 10:15:47,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 10:15:47,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 10:15:47,299 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 10:15:47,323 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 10:15:47,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 10:15:47,323 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 10:15:47,324 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 10:15:47,324 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 10:15:47,324 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 10:15:47,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 10:15:47,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 10:15:47,325 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 10:15:47,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 10:15:47,326 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 10:15:47,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 10:15:47,326 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 10:15:47,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 10:15:47,326 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 10:15:47,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 10:15:47,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 10:15:47,327 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 10:15:47,328 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 10:15:47,328 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 10:15:47,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 10:15:47,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 10:15:47,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 10:15:47,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 10:15:47,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:15:47,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 10:15:47,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 10:15:47,329 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 10:15:47,329 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 10:15:47,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 10:15:47,329 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 10:15:47,330 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 10:15:47,330 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 10:15:47,330 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e1c46a3eec085decec4254bf9381483b25ba7b6541d5728ae52d1793b9b8c91 [2022-07-22 10:15:47,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 10:15:47,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 10:15:47,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 10:15:47,536 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 10:15:47,537 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 10:15:47,538 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/init-4-n-u.c [2022-07-22 10:15:47,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/132807407/9f2e7188c1164c2aa5878630725a3875/FLAG601b283b6 [2022-07-22 10:15:47,946 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 10:15:47,947 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/init-4-n-u.c [2022-07-22 10:15:47,951 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/132807407/9f2e7188c1164c2aa5878630725a3875/FLAG601b283b6 [2022-07-22 10:15:48,396 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/132807407/9f2e7188c1164c2aa5878630725a3875 [2022-07-22 10:15:48,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 10:15:48,399 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 10:15:48,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 10:15:48,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 10:15:48,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 10:15:48,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:15:48" (1/1) ... [2022-07-22 10:15:48,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c155e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:15:48, skipping insertion in model container [2022-07-22 10:15:48,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:15:48" (1/1) ... [2022-07-22 10:15:48,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 10:15:48,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 10:15:48,548 WARN L230 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-multidimensional/init-4-n-u.c[322,335] [2022-07-22 10:15:48,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:15:48,591 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 10:15:48,600 WARN L230 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-multidimensional/init-4-n-u.c[322,335] [2022-07-22 10:15:48,615 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:15:48,625 INFO L208 MainTranslator]: Completed translation [2022-07-22 10:15:48,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:15:48 WrapperNode [2022-07-22 10:15:48,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 10:15:48,627 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 10:15:48,627 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 10:15:48,627 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 10:15:48,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:15:48" (1/1) ... [2022-07-22 10:15:48,637 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:15:48" (1/1) ... [2022-07-22 10:15:48,651 INFO L137 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 98 [2022-07-22 10:15:48,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 10:15:48,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 10:15:48,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 10:15:48,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 10:15:48,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:15:48" (1/1) ... [2022-07-22 10:15:48,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:15:48" (1/1) ... [2022-07-22 10:15:48,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:15:48" (1/1) ... [2022-07-22 10:15:48,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:15:48" (1/1) ... [2022-07-22 10:15:48,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:15:48" (1/1) ... [2022-07-22 10:15:48,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:15:48" (1/1) ... [2022-07-22 10:15:48,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:15:48" (1/1) ... [2022-07-22 10:15:48,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 10:15:48,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 10:15:48,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 10:15:48,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 10:15:48,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:15:48" (1/1) ... [2022-07-22 10:15:48,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:15:48,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:15:48,726 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 10:15:48,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 10:15:48,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 10:15:48,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 10:15:48,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 10:15:48,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 10:15:48,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 10:15:48,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 10:15:48,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 10:15:48,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 10:15:48,815 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 10:15:48,816 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 10:15:48,915 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 10:15:48,920 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 10:15:48,920 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2022-07-22 10:15:48,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:15:48 BoogieIcfgContainer [2022-07-22 10:15:48,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 10:15:48,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 10:15:48,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 10:15:48,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 10:15:48,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 10:15:48" (1/3) ... [2022-07-22 10:15:48,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f2494de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:15:48, skipping insertion in model container [2022-07-22 10:15:48,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:15:48" (2/3) ... [2022-07-22 10:15:48,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f2494de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:15:48, skipping insertion in model container [2022-07-22 10:15:48,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:15:48" (3/3) ... [2022-07-22 10:15:48,927 INFO L111 eAbstractionObserver]: Analyzing ICFG init-4-n-u.c [2022-07-22 10:15:48,936 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 10:15:48,937 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 10:15:48,966 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 10:15:48,970 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5e8ebf99, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@9be3206 [2022-07-22 10:15:48,971 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 10:15:48,973 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:15:48,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-22 10:15:48,977 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:15:48,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:15:48,978 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:15:48,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:15:48,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1868122297, now seen corresponding path program 1 times [2022-07-22 10:15:48,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:15:48,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926190981] [2022-07-22 10:15:48,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:15:48,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:15:49,043 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:15:49,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286238792] [2022-07-22 10:15:49,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:15:49,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:15:49,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:15:49,046 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:15:49,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 10:15:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:15:49,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-22 10:15:49,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:15:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:15:49,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 10:15:49,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:15:49,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926190981] [2022-07-22 10:15:49,113 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:15:49,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286238792] [2022-07-22 10:15:49,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286238792] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:15:49,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:15:49,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 10:15:49,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598911511] [2022-07-22 10:15:49,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:15:49,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 10:15:49,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:15:49,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 10:15:49,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 10:15:49,159 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:15:49,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:15:49,179 INFO L93 Difference]: Finished difference Result 48 states and 80 transitions. [2022-07-22 10:15:49,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 10:15:49,181 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-22 10:15:49,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:15:49,186 INFO L225 Difference]: With dead ends: 48 [2022-07-22 10:15:49,186 INFO L226 Difference]: Without dead ends: 21 [2022-07-22 10:15:49,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 10:15:49,193 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 [2022-07-22 10:15:49,195 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] [2022-07-22 10:15:49,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-22 10:15:49,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-22 10:15:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:15:49,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2022-07-22 10:15:49,218 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 10 [2022-07-22 10:15:49,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:15:49,218 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2022-07-22 10:15:49,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:15:49,219 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2022-07-22 10:15:49,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-22 10:15:49,220 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:15:49,220 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:15:49,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 10:15:49,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-22 10:15:49,438 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:15:49,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:15:49,440 INFO L85 PathProgramCache]: Analyzing trace with hash -58278076, now seen corresponding path program 1 times [2022-07-22 10:15:49,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:15:49,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334189293] [2022-07-22 10:15:49,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:15:49,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:15:49,457 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:15:49,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303508011] [2022-07-22 10:15:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:15:49,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:15:49,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:15:49,484 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:15:49,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 10:15:49,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:15:49,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 10:15:49,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:15:49,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:15:49,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 10:15:49,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:15:49,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334189293] [2022-07-22 10:15:49,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:15:49,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303508011] [2022-07-22 10:15:49,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303508011] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:15:49,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:15:49,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 10:15:49,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670058038] [2022-07-22 10:15:49,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:15:49,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 10:15:49,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:15:49,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 10:15:49,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 10:15:49,599 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:15:49,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:15:49,633 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2022-07-22 10:15:49,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 10:15:49,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-22 10:15:49,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:15:49,636 INFO L225 Difference]: With dead ends: 40 [2022-07-22 10:15:49,637 INFO L226 Difference]: Without dead ends: 28 [2022-07-22 10:15:49,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 10:15:49,638 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:15:49,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 44 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:15:49,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-22 10:15:49,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2022-07-22 10:15:49,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:15:49,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2022-07-22 10:15:49,649 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 10 [2022-07-22 10:15:49,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:15:49,649 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2022-07-22 10:15:49,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:15:49,650 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2022-07-22 10:15:49,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-22 10:15:49,651 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:15:49,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:15:49,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 10:15:49,868 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,SelfDestructingSolverStorable1 [2022-07-22 10:15:49,871 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:15:49,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:15:49,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1196059767, now seen corresponding path program 1 times [2022-07-22 10:15:49,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:15:49,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15890818] [2022-07-22 10:15:49,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:15:49,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:15:49,885 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:15:49,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1438612732] [2022-07-22 10:15:49,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:15:49,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:15:49,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:15:49,887 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:15:49,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 10:15:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:15:49,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 10:15:49,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:15:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:15:49,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 10:15:49,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:15:49,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15890818] [2022-07-22 10:15:49,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:15:49,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438612732] [2022-07-22 10:15:49,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438612732] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:15:49,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:15:49,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 10:15:49,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053395419] [2022-07-22 10:15:49,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:15:49,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 10:15:49,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:15:49,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 10:15:49,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:15:49,972 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:15:50,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:15:50,034 INFO L93 Difference]: Finished difference Result 56 states and 76 transitions. [2022-07-22 10:15:50,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 10:15:50,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-22 10:15:50,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:15:50,038 INFO L225 Difference]: With dead ends: 56 [2022-07-22 10:15:50,039 INFO L226 Difference]: Without dead ends: 37 [2022-07-22 10:15:50,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:15:50,042 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:15:50,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 36 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:15:50,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-22 10:15:50,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2022-07-22 10:15:50,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:15:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2022-07-22 10:15:50,056 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 13 [2022-07-22 10:15:50,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:15:50,057 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2022-07-22 10:15:50,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:15:50,059 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2022-07-22 10:15:50,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 10:15:50,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:15:50,060 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:15:50,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 10:15:50,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:15:50,290 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:15:50,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:15:50,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1301954304, now seen corresponding path program 1 times [2022-07-22 10:15:50,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:15:50,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381418760] [2022-07-22 10:15:50,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:15:50,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:15:50,302 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:15:50,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711358103] [2022-07-22 10:15:50,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:15:50,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:15:50,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:15:50,324 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:15:50,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 10:15:50,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:15:50,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 10:15:50,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:15:50,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:15:50,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 10:15:50,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:15:50,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381418760] [2022-07-22 10:15:50,380 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:15:50,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711358103] [2022-07-22 10:15:50,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711358103] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:15:50,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:15:50,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 10:15:50,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203178910] [2022-07-22 10:15:50,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:15:50,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 10:15:50,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:15:50,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 10:15:50,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:15:50,381 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:15:50,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:15:50,410 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2022-07-22 10:15:50,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 10:15:50,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-22 10:15:50,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:15:50,411 INFO L225 Difference]: With dead ends: 56 [2022-07-22 10:15:50,411 INFO L226 Difference]: Without dead ends: 35 [2022-07-22 10:15:50,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:15:50,412 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:15:50,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 34 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:15:50,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-22 10:15:50,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2022-07-22 10:15:50,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:15:50,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2022-07-22 10:15:50,416 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 16 [2022-07-22 10:15:50,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:15:50,417 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2022-07-22 10:15:50,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:15:50,417 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2022-07-22 10:15:50,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-22 10:15:50,417 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:15:50,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:15:50,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-22 10:15:50,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:15:50,621 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:15:50,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:15:50,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1938337909, now seen corresponding path program 1 times [2022-07-22 10:15:50,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:15:50,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129599751] [2022-07-22 10:15:50,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:15:50,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:15:50,642 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:15:50,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441990245] [2022-07-22 10:15:50,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:15:50,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:15:50,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:15:50,649 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:15:50,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 10:15:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:15:50,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 10:15:50,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:15:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:15:50,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 10:15:50,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:15:50,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129599751] [2022-07-22 10:15:50,709 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:15:50,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441990245] [2022-07-22 10:15:50,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441990245] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:15:50,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:15:50,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 10:15:50,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097824903] [2022-07-22 10:15:50,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:15:50,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 10:15:50,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:15:50,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 10:15:50,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:15:50,711 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:15:50,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:15:50,735 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2022-07-22 10:15:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 10:15:50,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-22 10:15:50,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:15:50,736 INFO L225 Difference]: With dead ends: 56 [2022-07-22 10:15:50,736 INFO L226 Difference]: Without dead ends: 33 [2022-07-22 10:15:50,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:15:50,737 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:15:50,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:15:50,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-22 10:15:50,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-07-22 10:15:50,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:15:50,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-07-22 10:15:50,742 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 19 [2022-07-22 10:15:50,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:15:50,742 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-07-22 10:15:50,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:15:50,742 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-07-22 10:15:50,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-22 10:15:50,743 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:15:50,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:15:50,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 10:15:50,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:15:50,961 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:15:50,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:15:50,962 INFO L85 PathProgramCache]: Analyzing trace with hash 582253679, now seen corresponding path program 1 times [2022-07-22 10:15:50,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:15:50,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614296479] [2022-07-22 10:15:50,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:15:50,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:15:50,970 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:15:50,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435827257] [2022-07-22 10:15:50,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:15:50,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:15:50,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:15:50,992 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:15:50,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 10:15:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:15:51,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 10:15:51,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:15:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:15:51,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:15:51,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:15:51,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:15:51,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614296479] [2022-07-22 10:15:51,123 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:15:51,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435827257] [2022-07-22 10:15:51,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435827257] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:15:51,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:15:51,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-22 10:15:51,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772550088] [2022-07-22 10:15:51,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:15:51,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 10:15:51,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:15:51,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 10:15:51,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-22 10:15:51,127 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:15:51,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:15:51,202 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2022-07-22 10:15:51,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 10:15:51,203 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-22 10:15:51,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:15:51,208 INFO L225 Difference]: With dead ends: 72 [2022-07-22 10:15:51,208 INFO L226 Difference]: Without dead ends: 47 [2022-07-22 10:15:51,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-07-22 10:15:51,209 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 101 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:15:51,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 45 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:15:51,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-22 10:15:51,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2022-07-22 10:15:51,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:15:51,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-07-22 10:15:51,216 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 20 [2022-07-22 10:15:51,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:15:51,216 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-07-22 10:15:51,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:15:51,216 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-07-22 10:15:51,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-22 10:15:51,217 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:15:51,217 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:15:51,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 10:15:51,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:15:51,432 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:15:51,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:15:51,435 INFO L85 PathProgramCache]: Analyzing trace with hash -926062453, now seen corresponding path program 2 times [2022-07-22 10:15:51,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:15:51,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080713998] [2022-07-22 10:15:51,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:15:51,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:15:51,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:15:51,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420819380] [2022-07-22 10:15:51,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:15:51,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:15:51,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:15:51,451 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:15:51,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 10:15:51,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:15:51,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:15:51,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 10:15:51,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:15:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:15:51,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:15:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:15:51,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:15:51,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080713998] [2022-07-22 10:15:51,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:15:51,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420819380] [2022-07-22 10:15:51,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420819380] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:15:51,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:15:51,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-22 10:15:51,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628193675] [2022-07-22 10:15:51,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:15:51,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 10:15:51,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:15:51,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 10:15:51,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-07-22 10:15:51,612 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:15:51,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:15:51,754 INFO L93 Difference]: Finished difference Result 120 states and 149 transitions. [2022-07-22 10:15:51,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 10:15:51,754 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-22 10:15:51,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:15:51,757 INFO L225 Difference]: With dead ends: 120 [2022-07-22 10:15:51,758 INFO L226 Difference]: Without dead ends: 83 [2022-07-22 10:15:51,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-07-22 10:15:51,761 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 119 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:15:51,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 100 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:15:51,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-22 10:15:51,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2022-07-22 10:15:51,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 63 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:15:51,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-07-22 10:15:51,779 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 23 [2022-07-22 10:15:51,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:15:51,779 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-07-22 10:15:51,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:15:51,780 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-07-22 10:15:51,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-22 10:15:51,780 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:15:51,780 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:15:51,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 10:15:51,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:15:51,999 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:15:51,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:15:52,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1928338955, now seen corresponding path program 3 times [2022-07-22 10:15:52,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:15:52,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188188669] [2022-07-22 10:15:52,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:15:52,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:15:52,009 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:15:52,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1721305120] [2022-07-22 10:15:52,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:15:52,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:15:52,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:15:52,011 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:15:52,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 10:15:52,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 10:15:52,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:15:52,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 10:15:52,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:15:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-22 10:15:52,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:15:52,152 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-22 10:15:52,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:15:52,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188188669] [2022-07-22 10:15:52,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:15:52,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721305120] [2022-07-22 10:15:52,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721305120] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:15:52,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:15:52,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-22 10:15:52,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559788458] [2022-07-22 10:15:52,154 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:15:52,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 10:15:52,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:15:52,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 10:15:52,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-07-22 10:15:52,155 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:15:52,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:15:52,191 INFO L93 Difference]: Finished difference Result 163 states and 203 transitions. [2022-07-22 10:15:52,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 10:15:52,191 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-22 10:15:52,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:15:52,193 INFO L225 Difference]: With dead ends: 163 [2022-07-22 10:15:52,193 INFO L226 Difference]: Without dead ends: 121 [2022-07-22 10:15:52,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-07-22 10:15:52,194 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 48 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:15:52,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 57 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:15:52,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-22 10:15:52,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-07-22 10:15:52,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.2166666666666666) internal successors, (146), 120 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:15:52,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 146 transitions. [2022-07-22 10:15:52,210 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 146 transitions. Word has length 29 [2022-07-22 10:15:52,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:15:52,210 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 146 transitions. [2022-07-22 10:15:52,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:15:52,211 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 146 transitions. [2022-07-22 10:15:52,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-22 10:15:52,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:15:52,212 INFO L195 NwaCegarLoop]: trace histogram [40, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:15:52,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 10:15:52,426 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,SelfDestructingSolverStorable7 [2022-07-22 10:15:52,427 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:15:52,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:15:52,427 INFO L85 PathProgramCache]: Analyzing trace with hash 2101380, now seen corresponding path program 4 times [2022-07-22 10:15:52,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:15:52,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880134846] [2022-07-22 10:15:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:15:52,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:15:52,473 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:15:52,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983027060] [2022-07-22 10:15:52,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:15:52,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:15:52,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:15:52,481 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:15:52,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 10:16:30,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:16:30,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:16:30,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 10:16:30,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:16:30,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 381 proven. 55 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2022-07-22 10:16:30,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:16:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 381 proven. 55 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2022-07-22 10:16:30,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:16:30,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880134846] [2022-07-22 10:16:30,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:16:30,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983027060] [2022-07-22 10:16:30,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983027060] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:16:30,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:16:30,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-22 10:16:30,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050194333] [2022-07-22 10:16:30,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:16:30,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 10:16:30,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:16:30,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 10:16:30,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-07-22 10:16:30,866 INFO L87 Difference]: Start difference. First operand 121 states and 146 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:16:31,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:16:31,195 INFO L93 Difference]: Finished difference Result 365 states and 466 transitions. [2022-07-22 10:16:31,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 10:16:31,196 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-07-22 10:16:31,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:16:31,197 INFO L225 Difference]: With dead ends: 365 [2022-07-22 10:16:31,197 INFO L226 Difference]: Without dead ends: 248 [2022-07-22 10:16:31,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 10:16:31,201 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 326 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:16:31,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 159 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:16:31,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-07-22 10:16:31,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 205. [2022-07-22 10:16:31,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.1862745098039216) internal successors, (242), 204 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:16:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 242 transitions. [2022-07-22 10:16:31,230 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 242 transitions. Word has length 86 [2022-07-22 10:16:31,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:16:31,232 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 242 transitions. [2022-07-22 10:16:31,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:16:31,232 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 242 transitions. [2022-07-22 10:16:31,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-22 10:16:31,236 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:16:31,236 INFO L195 NwaCegarLoop]: trace histogram [88, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:16:31,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 10:16:31,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:16:31,451 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:16:31,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:16:31,452 INFO L85 PathProgramCache]: Analyzing trace with hash 916329860, now seen corresponding path program 5 times [2022-07-22 10:16:31,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:16:31,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404227019] [2022-07-22 10:16:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:16:31,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:16:31,489 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:16:31,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954849366] [2022-07-22 10:16:31,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:16:31,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:16:31,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:16:31,491 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:16:31,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process