./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-multidimensional/min-3-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/min-3-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 9bd7b1a8bed68c803bda82a4dd989302b30da7d6d96131ca67565e0ea166dbcb --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 08:44:35,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 08:44:35,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 08:44:35,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 08:44:35,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 08:44:35,115 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 08:44:35,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 08:44:35,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 08:44:35,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 08:44:35,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 08:44:35,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 08:44:35,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 08:44:35,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 08:44:35,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 08:44:35,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 08:44:35,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 08:44:35,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 08:44:35,139 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 08:44:35,140 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 08:44:35,145 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 08:44:35,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 08:44:35,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 08:44:35,151 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 08:44:35,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 08:44:35,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 08:44:35,155 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 08:44:35,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 08:44:35,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 08:44:35,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 08:44:35,157 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 08:44:35,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 08:44:35,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 08:44:35,160 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 08:44:35,161 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 08:44:35,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 08:44:35,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 08:44:35,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 08:44:35,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 08:44:35,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 08:44:35,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 08:44:35,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 08:44:35,165 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 08:44:35,197 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 08:44:35,197 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 08:44:35,198 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 08:44:35,198 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 08:44:35,199 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 08:44:35,199 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 08:44:35,200 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 08:44:35,200 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 08:44:35,200 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 08:44:35,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 08:44:35,201 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 08:44:35,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 08:44:35,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 08:44:35,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 08:44:35,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 08:44:35,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 08:44:35,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 08:44:35,202 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 08:44:35,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 08:44:35,203 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 08:44:35,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 08:44:35,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 08:44:35,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 08:44:35,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 08:44:35,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:44:35,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 08:44:35,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 08:44:35,205 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 08:44:35,206 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 08:44:35,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 08:44:35,206 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 08:44:35,206 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 08:44:35,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 08:44:35,207 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 08:44:35,207 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9bd7b1a8bed68c803bda82a4dd989302b30da7d6d96131ca67565e0ea166dbcb [2021-12-15 08:44:35,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 08:44:35,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 08:44:35,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 08:44:35,434 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 08:44:35,435 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 08:44:35,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2021-12-15 08:44:35,493 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b00d54acd/fe02cd885e0b481e842adffeafa67796/FLAG98014e763 [2021-12-15 08:44:35,849 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 08:44:35,850 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2021-12-15 08:44:35,856 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b00d54acd/fe02cd885e0b481e842adffeafa67796/FLAG98014e763 [2021-12-15 08:44:36,287 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b00d54acd/fe02cd885e0b481e842adffeafa67796 [2021-12-15 08:44:36,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 08:44:36,291 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 08:44:36,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 08:44:36,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 08:44:36,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 08:44:36,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:44:36" (1/1) ... [2021-12-15 08:44:36,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d43b08d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:44:36, skipping insertion in model container [2021-12-15 08:44:36,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:44:36" (1/1) ... [2021-12-15 08:44:36,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 08:44:36,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 08:44:36,442 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/min-3-n-u.c[321,334] [2021-12-15 08:44:36,458 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:44:36,464 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 08:44:36,473 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/min-3-n-u.c[321,334] [2021-12-15 08:44:36,482 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:44:36,493 INFO L208 MainTranslator]: Completed translation [2021-12-15 08:44:36,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:44:36 WrapperNode [2021-12-15 08:44:36,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 08:44:36,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 08:44:36,495 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 08:44:36,495 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 08:44:36,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:44:36" (1/1) ... [2021-12-15 08:44:36,511 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:44:36" (1/1) ... [2021-12-15 08:44:36,536 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 109 [2021-12-15 08:44:36,537 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 08:44:36,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 08:44:36,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 08:44:36,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 08:44:36,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:44:36" (1/1) ... [2021-12-15 08:44:36,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:44:36" (1/1) ... [2021-12-15 08:44:36,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:44:36" (1/1) ... [2021-12-15 08:44:36,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:44:36" (1/1) ... [2021-12-15 08:44:36,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:44:36" (1/1) ... [2021-12-15 08:44:36,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:44:36" (1/1) ... [2021-12-15 08:44:36,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:44:36" (1/1) ... [2021-12-15 08:44:36,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 08:44:36,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 08:44:36,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 08:44:36,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 08:44:36,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:44:36" (1/1) ... [2021-12-15 08:44:36,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:44:36,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:44:36,616 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 08:44:36,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 08:44:36,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 08:44:36,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 08:44:36,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 08:44:36,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 08:44:36,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 08:44:36,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 08:44:36,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 08:44:36,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 08:44:36,712 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 08:44:36,713 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 08:44:36,826 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 08:44:36,831 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 08:44:36,831 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-15 08:44:36,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:44:36 BoogieIcfgContainer [2021-12-15 08:44:36,833 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 08:44:36,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 08:44:36,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 08:44:36,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 08:44:36,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:44:36" (1/3) ... [2021-12-15 08:44:36,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7088043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:44:36, skipping insertion in model container [2021-12-15 08:44:36,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:44:36" (2/3) ... [2021-12-15 08:44:36,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7088043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:44:36, skipping insertion in model container [2021-12-15 08:44:36,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:44:36" (3/3) ... [2021-12-15 08:44:36,840 INFO L111 eAbstractionObserver]: Analyzing ICFG min-3-n-u.c [2021-12-15 08:44:36,844 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 08:44:36,844 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 08:44:36,913 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 08:44:36,933 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 08:44:36,934 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 08:44:36,958 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:44:36,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 08:44:36,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:44:36,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:44:36,970 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:44:36,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:44:36,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1361272673, now seen corresponding path program 1 times [2021-12-15 08:44:36,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:44:36,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786246255] [2021-12-15 08:44:36,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:44:36,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:44:37,079 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 08:44:37,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [612928187] [2021-12-15 08:44:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:44:37,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:44:37,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:44:37,087 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:44:37,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 08:44:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:44:37,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-15 08:44:37,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:44:37,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:44:37,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:44:37,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:44:37,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786246255] [2021-12-15 08:44:37,250 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 08:44:37,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612928187] [2021-12-15 08:44:37,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612928187] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:44:37,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:44:37,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 08:44:37,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416171217] [2021-12-15 08:44:37,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:44:37,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 08:44:37,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:44:37,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 08:44:37,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 08:44:37,292 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:44:37,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:44:37,312 INFO L93 Difference]: Finished difference Result 56 states and 94 transitions. [2021-12-15 08:44:37,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 08:44:37,314 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-15 08:44:37,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:44:37,320 INFO L225 Difference]: With dead ends: 56 [2021-12-15 08:44:37,320 INFO L226 Difference]: Without dead ends: 25 [2021-12-15 08:44:37,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 08:44:37,326 INFO L933 BasicCegarLoop]: 38 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, 38 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 [2021-12-15 08:44:37,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:44:37,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-15 08:44:37,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-15 08:44:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:44:37,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-12-15 08:44:37,369 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 11 [2021-12-15 08:44:37,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:44:37,370 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-12-15 08:44:37,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:44:37,371 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-12-15 08:44:37,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 08:44:37,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:44:37,372 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:44:37,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 08:44:37,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-15 08:44:37,584 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:44:37,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:44:37,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1322753665, now seen corresponding path program 1 times [2021-12-15 08:44:37,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:44:37,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754996880] [2021-12-15 08:44:37,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:44:37,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:44:37,598 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 08:44:37,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398120011] [2021-12-15 08:44:37,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:44:37,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:44:37,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:44:37,604 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:44:37,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 08:44:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:44:37,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 08:44:37,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:44:37,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:44:37,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:44:37,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:44:37,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754996880] [2021-12-15 08:44:37,747 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 08:44:37,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398120011] [2021-12-15 08:44:37,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398120011] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:44:37,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:44:37,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:44:37,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791878727] [2021-12-15 08:44:37,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:44:37,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:44:37,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:44:37,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:44:37,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:44:37,756 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:44:37,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:44:37,799 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-12-15 08:44:37,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:44:37,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-15 08:44:37,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:44:37,804 INFO L225 Difference]: With dead ends: 48 [2021-12-15 08:44:37,805 INFO L226 Difference]: Without dead ends: 30 [2021-12-15 08:44:37,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:44:37,807 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:44:37,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 50 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:44:37,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-15 08:44:37,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-12-15 08:44:37,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.4) internal successors, (35), 25 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) [2021-12-15 08:44:37,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2021-12-15 08:44:37,815 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 11 [2021-12-15 08:44:37,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:44:37,816 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2021-12-15 08:44:37,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:44:37,816 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2021-12-15 08:44:37,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-15 08:44:37,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:44:37,817 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:44:37,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 08:44:38,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-15 08:44:38,036 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:44:38,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:44:38,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1329032119, now seen corresponding path program 1 times [2021-12-15 08:44:38,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:44:38,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411557772] [2021-12-15 08:44:38,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:44:38,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:44:38,045 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 08:44:38,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756489609] [2021-12-15 08:44:38,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:44:38,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:44:38,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:44:38,047 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:44:38,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 08:44:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:44:38,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 08:44:38,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:44:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:44:38,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:44:38,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:44:38,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411557772] [2021-12-15 08:44:38,147 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 08:44:38,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756489609] [2021-12-15 08:44:38,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756489609] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:44:38,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:44:38,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:44:38,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957368818] [2021-12-15 08:44:38,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:44:38,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:44:38,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:44:38,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:44:38,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:44:38,149 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:44:38,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:44:38,193 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2021-12-15 08:44:38,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:44:38,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2021-12-15 08:44:38,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:44:38,194 INFO L225 Difference]: With dead ends: 67 [2021-12-15 08:44:38,194 INFO L226 Difference]: Without dead ends: 44 [2021-12-15 08:44:38,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:44:38,196 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 70 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:44:38,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 36 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:44:38,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-15 08:44:38,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2021-12-15 08:44:38,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:44:38,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2021-12-15 08:44:38,201 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 14 [2021-12-15 08:44:38,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:44:38,202 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2021-12-15 08:44:38,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:44:38,202 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2021-12-15 08:44:38,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 08:44:38,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:44:38,203 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:44:38,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 08:44:38,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:44:38,416 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:44:38,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:44:38,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1416884703, now seen corresponding path program 1 times [2021-12-15 08:44:38,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:44:38,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603182686] [2021-12-15 08:44:38,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:44:38,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:44:38,423 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 08:44:38,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639018022] [2021-12-15 08:44:38,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:44:38,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:44:38,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:44:38,426 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:44:38,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 08:44:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:44:38,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 08:44:38,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:44:38,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:44:38,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:44:38,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:44:38,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603182686] [2021-12-15 08:44:38,516 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 08:44:38,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639018022] [2021-12-15 08:44:38,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639018022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:44:38,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:44:38,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:44:38,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504244248] [2021-12-15 08:44:38,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:44:38,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:44:38,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:44:38,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:44:38,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:44:38,518 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:44:38,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:44:38,564 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2021-12-15 08:44:38,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:44:38,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-15 08:44:38,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:44:38,565 INFO L225 Difference]: With dead ends: 67 [2021-12-15 08:44:38,566 INFO L226 Difference]: Without dead ends: 41 [2021-12-15 08:44:38,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:44:38,567 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:44:38,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 42 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:44:38,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-15 08:44:38,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-12-15 08:44:38,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 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) [2021-12-15 08:44:38,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-12-15 08:44:38,573 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2021-12-15 08:44:38,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:44:38,573 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-12-15 08:44:38,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:44:38,573 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-12-15 08:44:38,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-15 08:44:38,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:44:38,574 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:44:38,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 08:44:38,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:44:38,792 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:44:38,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:44:38,792 INFO L85 PathProgramCache]: Analyzing trace with hash 109301050, now seen corresponding path program 1 times [2021-12-15 08:44:38,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:44:38,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069915998] [2021-12-15 08:44:38,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:44:38,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:44:38,799 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 08:44:38,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110868030] [2021-12-15 08:44:38,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:44:38,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:44:38,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:44:38,803 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:44:38,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 08:44:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:44:38,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 08:44:38,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:44:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:44:38,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:44:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:44:38,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:44:38,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069915998] [2021-12-15 08:44:38,964 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 08:44:38,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110868030] [2021-12-15 08:44:38,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110868030] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:44:38,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 08:44:38,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-15 08:44:38,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626964469] [2021-12-15 08:44:38,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 08:44:38,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 08:44:38,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:44:38,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 08:44:38,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-15 08:44:38,968 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:44:39,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:44:39,088 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2021-12-15 08:44:39,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 08:44:39,089 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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 18 [2021-12-15 08:44:39,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:44:39,089 INFO L225 Difference]: With dead ends: 91 [2021-12-15 08:44:39,089 INFO L226 Difference]: Without dead ends: 62 [2021-12-15 08:44:39,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-12-15 08:44:39,091 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 110 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:44:39,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 51 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:44:39,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-15 08:44:39,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2021-12-15 08:44:39,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:44:39,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-12-15 08:44:39,098 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 18 [2021-12-15 08:44:39,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:44:39,099 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-12-15 08:44:39,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:44:39,099 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-12-15 08:44:39,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-15 08:44:39,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:44:39,100 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:44:39,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 08:44:39,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:44:39,316 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:44:39,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:44:39,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1195208863, now seen corresponding path program 2 times [2021-12-15 08:44:39,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:44:39,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166339905] [2021-12-15 08:44:39,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:44:39,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:44:39,324 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 08:44:39,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926985994] [2021-12-15 08:44:39,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:44:39,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:44:39,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:44:39,327 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:44:39,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 08:44:39,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-15 08:44:39,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:44:39,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 08:44:39,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:44:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 08:44:39,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:44:39,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:44:39,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166339905] [2021-12-15 08:44:39,425 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 08:44:39,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926985994] [2021-12-15 08:44:39,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926985994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:44:39,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:44:39,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:44:39,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6547180] [2021-12-15 08:44:39,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:44:39,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:44:39,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:44:39,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:44:39,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:44:39,427 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:44:39,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:44:39,467 INFO L93 Difference]: Finished difference Result 121 states and 155 transitions. [2021-12-15 08:44:39,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:44:39,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 21 [2021-12-15 08:44:39,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:44:39,473 INFO L225 Difference]: With dead ends: 121 [2021-12-15 08:44:39,473 INFO L226 Difference]: Without dead ends: 100 [2021-12-15 08:44:39,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:44:39,476 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:44:39,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 41 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:44:39,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-15 08:44:39,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 54. [2021-12-15 08:44:39,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:44:39,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-12-15 08:44:39,498 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 21 [2021-12-15 08:44:39,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:44:39,498 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-12-15 08:44:39,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:44:39,499 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-12-15 08:44:39,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-15 08:44:39,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:44:39,499 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:44:39,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 08:44:39,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:44:39,705 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:44:39,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:44:39,706 INFO L85 PathProgramCache]: Analyzing trace with hash 238928719, now seen corresponding path program 1 times [2021-12-15 08:44:39,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:44:39,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809363862] [2021-12-15 08:44:39,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:44:39,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:44:39,738 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 08:44:39,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1366305990] [2021-12-15 08:44:39,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:44:39,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:44:39,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:44:39,750 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:44:39,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 08:44:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:44:39,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-15 08:44:39,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:44:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-15 08:44:39,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:44:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-15 08:44:40,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:44:40,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809363862] [2021-12-15 08:44:40,064 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 08:44:40,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366305990] [2021-12-15 08:44:40,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366305990] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:44:40,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 08:44:40,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-15 08:44:40,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060841425] [2021-12-15 08:44:40,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 08:44:40,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 08:44:40,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:44:40,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 08:44:40,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-12-15 08:44:40,066 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:44:40,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:44:40,275 INFO L93 Difference]: Finished difference Result 166 states and 217 transitions. [2021-12-15 08:44:40,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 08:44:40,276 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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 39 [2021-12-15 08:44:40,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:44:40,276 INFO L225 Difference]: With dead ends: 166 [2021-12-15 08:44:40,277 INFO L226 Difference]: Without dead ends: 115 [2021-12-15 08:44:40,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2021-12-15 08:44:40,278 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 305 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:44:40,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 86 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:44:40,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-15 08:44:40,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2021-12-15 08:44:40,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.2947368421052632) internal successors, (123), 95 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:44:40,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2021-12-15 08:44:40,289 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 39 [2021-12-15 08:44:40,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:44:40,289 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2021-12-15 08:44:40,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:44:40,290 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2021-12-15 08:44:40,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-15 08:44:40,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:44:40,291 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:44:40,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 08:44:40,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:44:40,508 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:44:40,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:44:40,508 INFO L85 PathProgramCache]: Analyzing trace with hash 66224111, now seen corresponding path program 2 times [2021-12-15 08:44:40,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:44:40,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040712246] [2021-12-15 08:44:40,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:44:40,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:44:40,517 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 08:44:40,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393106321] [2021-12-15 08:44:40,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:44:40,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:44:40,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:44:40,528 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:44:40,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 08:44:40,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:44:40,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:44:40,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-15 08:44:40,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:44:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-15 08:44:40,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:44:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-15 08:44:41,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:44:41,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040712246] [2021-12-15 08:44:41,090 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 08:44:41,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393106321] [2021-12-15 08:44:41,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393106321] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:44:41,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 08:44:41,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-12-15 08:44:41,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439157915] [2021-12-15 08:44:41,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 08:44:41,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-15 08:44:41,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:44:41,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-15 08:44:41,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2021-12-15 08:44:41,092 INFO L87 Difference]: Start difference. First operand 96 states and 123 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) [2021-12-15 08:44:41,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:44:41,597 INFO L93 Difference]: Finished difference Result 316 states and 409 transitions. [2021-12-15 08:44:41,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-15 08:44:41,597 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) Word has length 63 [2021-12-15 08:44:41,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:44:41,598 INFO L225 Difference]: With dead ends: 316 [2021-12-15 08:44:41,598 INFO L226 Difference]: Without dead ends: 223 [2021-12-15 08:44:41,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2021-12-15 08:44:41,600 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 711 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:44:41,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 158 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 08:44:41,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-12-15 08:44:41,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 180. [2021-12-15 08:44:41,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.2905027932960893) internal successors, (231), 179 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:44:41,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 231 transitions. [2021-12-15 08:44:41,614 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 231 transitions. Word has length 63 [2021-12-15 08:44:41,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:44:41,615 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 231 transitions. [2021-12-15 08:44:41,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) [2021-12-15 08:44:41,615 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 231 transitions. [2021-12-15 08:44:41,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-15 08:44:41,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:44:41,618 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:44:41,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 08:44:41,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-15 08:44:41,842 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:44:41,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:44:41,842 INFO L85 PathProgramCache]: Analyzing trace with hash 811802927, now seen corresponding path program 3 times [2021-12-15 08:44:41,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:44:41,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093357489] [2021-12-15 08:44:41,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:44:41,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:44:41,857 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 08:44:41,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380074799] [2021-12-15 08:44:41,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:44:41,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:44:41,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:44:41,859 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:44:41,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 08:44:41,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-15 08:44:41,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:44:41,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 08:44:41,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:44:42,288 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2021-12-15 08:44:42,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:44:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2021-12-15 08:44:42,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:44:42,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093357489] [2021-12-15 08:44:42,544 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 08:44:42,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380074799] [2021-12-15 08:44:42,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380074799] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:44:42,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 08:44:42,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-15 08:44:42,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638341814] [2021-12-15 08:44:42,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 08:44:42,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 08:44:42,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:44:42,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 08:44:42,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-15 08:44:42,550 INFO L87 Difference]: Start difference. First operand 180 states and 231 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:44:42,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:44:42,670 INFO L93 Difference]: Finished difference Result 852 states and 1104 transitions. [2021-12-15 08:44:42,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 08:44:42,671 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 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 111 [2021-12-15 08:44:42,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:44:42,674 INFO L225 Difference]: With dead ends: 852 [2021-12-15 08:44:42,674 INFO L226 Difference]: Without dead ends: 703 [2021-12-15 08:44:42,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-12-15 08:44:42,679 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 267 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:44:42,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 78 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:44:42,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-12-15 08:44:42,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 480. [2021-12-15 08:44:42,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 1.2713987473903967) internal successors, (609), 479 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:44:42,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 609 transitions. [2021-12-15 08:44:42,724 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 609 transitions. Word has length 111 [2021-12-15 08:44:42,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:44:42,725 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 609 transitions. [2021-12-15 08:44:42,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:44:42,725 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 609 transitions. [2021-12-15 08:44:42,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-12-15 08:44:42,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:44:42,735 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:44:42,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 08:44:42,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:44:42,951 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:44:42,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:44:42,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1613933369, now seen corresponding path program 4 times [2021-12-15 08:44:42,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:44:42,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550540386] [2021-12-15 08:44:42,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:44:42,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:44:42,997 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 08:44:42,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559253667] [2021-12-15 08:44:42,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 08:44:42,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:44:42,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:44:42,999 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:44:43,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 08:44:43,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 08:44:43,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:44:43,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 275 conjunts are in the unsatisfiable core [2021-12-15 08:44:43,281 INFO L286 TraceCheckSpWp]: Computing forward predicates...