./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifncomp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ifncomp.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa --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 6359f1f4cb6aed42e13f4959731bd90b4ed828bda061bd22e3b91472b1893854 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:57:55,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:57:55,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:57:55,286 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:57:55,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:57:55,288 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:57:55,290 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:57:55,292 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:57:55,294 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:57:55,295 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:57:55,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:57:55,297 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:57:55,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:57:55,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:57:55,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:57:55,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:57:55,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:57:55,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:57:55,304 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:57:55,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:57:55,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:57:55,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:57:55,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:57:55,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:57:55,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:57:55,313 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:57:55,314 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:57:55,314 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:57:55,315 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:57:55,316 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:57:55,316 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:57:55,317 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:57:55,317 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:57:55,318 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:57:55,319 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:57:55,319 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:57:55,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:57:55,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:57:55,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:57:55,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:57:55,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:57:55,322 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 20:57:55,346 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:57:55,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:57:55,347 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:57:55,347 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:57:55,348 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:57:55,348 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:57:55,349 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:57:55,349 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:57:55,349 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:57:55,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:57:55,350 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:57:55,350 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:57:55,350 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:57:55,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:57:55,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:57:55,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:57:55,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:57:55,351 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:57:55,351 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:57:55,352 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:57:55,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:57:55,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:57:55,352 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:57:55,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:57:55,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:57:55,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:57:55,353 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:57:55,353 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:57:55,353 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:57:55,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:57:55,354 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:57:55,354 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:57:55,354 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:57:55,354 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:57:55,355 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6359f1f4cb6aed42e13f4959731bd90b4ed828bda061bd22e3b91472b1893854 [2021-12-06 20:57:55,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:57:55,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:57:55,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:57:55,561 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:57:55,561 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:57:55,562 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-fpi/ifncomp.c [2021-12-06 20:57:55,602 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/data/0e6f8cb74/dbf542b60e95427f88cbe00c0f8e95c6/FLAG4f3392bff [2021-12-06 20:57:55,954 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:57:55,954 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/sv-benchmarks/c/array-fpi/ifncomp.c [2021-12-06 20:57:55,959 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/data/0e6f8cb74/dbf542b60e95427f88cbe00c0f8e95c6/FLAG4f3392bff [2021-12-06 20:57:55,968 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/data/0e6f8cb74/dbf542b60e95427f88cbe00c0f8e95c6 [2021-12-06 20:57:55,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:57:55,971 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:57:55,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:57:55,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:57:55,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:57:55,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:57:55" (1/1) ... [2021-12-06 20:57:55,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76f42377 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:55, skipping insertion in model container [2021-12-06 20:57:55,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:57:55" (1/1) ... [2021-12-06 20:57:55,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:57:55,991 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:57:56,098 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/sv-benchmarks/c/array-fpi/ifncomp.c[590,603] [2021-12-06 20:57:56,114 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:57:56,123 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:57:56,131 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/sv-benchmarks/c/array-fpi/ifncomp.c[590,603] [2021-12-06 20:57:56,140 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:57:56,151 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:57:56,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:56 WrapperNode [2021-12-06 20:57:56,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:57:56,152 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:57:56,152 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:57:56,152 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:57:56,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:56" (1/1) ... [2021-12-06 20:57:56,166 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:56" (1/1) ... [2021-12-06 20:57:56,188 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 92 [2021-12-06 20:57:56,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:57:56,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:57:56,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:57:56,190 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:57:56,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:56" (1/1) ... [2021-12-06 20:57:56,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:56" (1/1) ... [2021-12-06 20:57:56,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:56" (1/1) ... [2021-12-06 20:57:56,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:56" (1/1) ... [2021-12-06 20:57:56,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:56" (1/1) ... [2021-12-06 20:57:56,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:56" (1/1) ... [2021-12-06 20:57:56,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:56" (1/1) ... [2021-12-06 20:57:56,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:57:56,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:57:56,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:57:56,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:57:56,217 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:56" (1/1) ... [2021-12-06 20:57:56,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:57:56,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:57:56,246 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:57:56,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:57:56,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:57:56,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 20:57:56,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 20:57:56,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 20:57:56,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:57:56,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:57:56,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 20:57:56,329 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:57:56,330 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:57:56,452 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:57:56,457 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:57:56,457 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-06 20:57:56,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:57:56 BoogieIcfgContainer [2021-12-06 20:57:56,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:57:56,460 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:57:56,460 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:57:56,463 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:57:56,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:57:55" (1/3) ... [2021-12-06 20:57:56,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77076457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:57:56, skipping insertion in model container [2021-12-06 20:57:56,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:56" (2/3) ... [2021-12-06 20:57:56,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77076457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:57:56, skipping insertion in model container [2021-12-06 20:57:56,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:57:56" (3/3) ... [2021-12-06 20:57:56,466 INFO L111 eAbstractionObserver]: Analyzing ICFG ifncomp.c [2021-12-06 20:57:56,470 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:57:56,470 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 20:57:56,506 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:57:56,512 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 [2021-12-06 20:57:56,512 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 20:57:56,523 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 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) [2021-12-06 20:57:56,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 20:57:56,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:56,529 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:56,529 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:57:56,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:56,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1152450264, now seen corresponding path program 1 times [2021-12-06 20:57:56,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:56,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917165476] [2021-12-06 20:57:56,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:56,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:56,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:56,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917165476] [2021-12-06 20:57:56,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917165476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:56,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:56,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:57:56,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350868317] [2021-12-06 20:57:56,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:56,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 20:57:56,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:56,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 20:57:56,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:57:56,683 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 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 7.0) internal successors, (14), 2 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) [2021-12-06 20:57:56,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:56,695 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2021-12-06 20:57:56,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 20:57:56,697 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 [2021-12-06 20:57:56,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:56,703 INFO L225 Difference]: With dead ends: 50 [2021-12-06 20:57:56,703 INFO L226 Difference]: Without dead ends: 23 [2021-12-06 20:57:56,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:57:56,709 INFO L933 BasicCegarLoop]: 34 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, 34 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 [2021-12-06 20:57:56,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:57:56,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-06 20:57:56,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-06 20:57:56,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-12-06 20:57:56,736 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 14 [2021-12-06 20:57:56,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:56,736 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-12-06 20:57:56,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 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) [2021-12-06 20:57:56,737 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-12-06 20:57:56,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 20:57:56,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:56,738 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:56,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 20:57:56,738 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:57:56,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:56,739 INFO L85 PathProgramCache]: Analyzing trace with hash 670750212, now seen corresponding path program 1 times [2021-12-06 20:57:56,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:56,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979437722] [2021-12-06 20:57:56,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:56,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:56,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:56,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:56,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:56,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979437722] [2021-12-06 20:57:56,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979437722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:56,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:56,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:57:56,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005638151] [2021-12-06 20:57:56,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:56,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:57:56,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:56,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:57:56,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:57:56,822 INFO L87 Difference]: Start difference. First operand 23 states and 29 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) [2021-12-06 20:57:56,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:56,888 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2021-12-06 20:57:56,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:57:56,889 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 [2021-12-06 20:57:56,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:56,889 INFO L225 Difference]: With dead ends: 56 [2021-12-06 20:57:56,889 INFO L226 Difference]: Without dead ends: 38 [2021-12-06 20:57:56,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:57:56,891 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:56,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 19 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:57:56,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-06 20:57:56,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2021-12-06 20:57:56,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 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) [2021-12-06 20:57:56,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-12-06 20:57:56,897 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 14 [2021-12-06 20:57:56,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:56,897 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-12-06 20:57:56,898 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) [2021-12-06 20:57:56,898 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-12-06 20:57:56,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 20:57:56,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:56,899 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:56,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 20:57:56,899 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:57:56,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:56,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1978137699, now seen corresponding path program 1 times [2021-12-06 20:57:56,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:56,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027931396] [2021-12-06 20:57:56,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:56,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:56,924 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:57:56,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528592017] [2021-12-06 20:57:56,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:56,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:56,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:57:56,926 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:57:56,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 20:57:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:56,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 20:57:56,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:57:57,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 20:57:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:57:57,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:57:57,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:57,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027931396] [2021-12-06 20:57:57,108 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:57:57,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528592017] [2021-12-06 20:57:57,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528592017] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:57,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:57,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:57:57,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638975730] [2021-12-06 20:57:57,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:57,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:57:57,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:57,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:57:57,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:57:57,110 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2021-12-06 20:57:57,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:57,183 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2021-12-06 20:57:57,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:57:57,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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 23 [2021-12-06 20:57:57,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:57,185 INFO L225 Difference]: With dead ends: 46 [2021-12-06 20:57:57,185 INFO L226 Difference]: Without dead ends: 44 [2021-12-06 20:57:57,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:57:57,187 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:57,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 67 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:57:57,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-06 20:57:57,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2021-12-06 20:57:57,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 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) [2021-12-06 20:57:57,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-12-06 20:57:57,194 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 23 [2021-12-06 20:57:57,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:57,194 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-12-06 20:57:57,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2021-12-06 20:57:57,194 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-12-06 20:57:57,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 20:57:57,195 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:57,195 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:57,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:57:57,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:57,398 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:57:57,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:57,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1659346963, now seen corresponding path program 1 times [2021-12-06 20:57:57,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:57,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416135979] [2021-12-06 20:57:57,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:57,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:57,483 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:57:57,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085626377] [2021-12-06 20:57:57,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:57,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:57,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:57:57,488 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:57:57,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 20:57:57,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:57,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 20:57:57,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:57:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:57:57,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:57:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:57:57,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:57,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416135979] [2021-12-06 20:57:57,734 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:57:57,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085626377] [2021-12-06 20:57:57,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085626377] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:57:57,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:57:57,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-06 20:57:57,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509791386] [2021-12-06 20:57:57,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:57:57,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 20:57:57,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:57,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 20:57:57,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-06 20:57:57,737 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:57,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:57,850 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2021-12-06 20:57:57,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 20:57:57,851 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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 26 [2021-12-06 20:57:57,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:57,852 INFO L225 Difference]: With dead ends: 92 [2021-12-06 20:57:57,852 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 20:57:57,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:57:57,854 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:57,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 43 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:57:57,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 20:57:57,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2021-12-06 20:57:57,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 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) [2021-12-06 20:57:57,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-12-06 20:57:57,860 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 26 [2021-12-06 20:57:57,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:57,861 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-12-06 20:57:57,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:57,861 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-12-06 20:57:57,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 20:57:57,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:57,862 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:57,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 20:57:58,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-06 20:57:58,064 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:57:58,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:58,066 INFO L85 PathProgramCache]: Analyzing trace with hash -643446870, now seen corresponding path program 1 times [2021-12-06 20:57:58,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:58,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746769644] [2021-12-06 20:57:58,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:58,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:58,179 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:57:58,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648044595] [2021-12-06 20:57:58,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:58,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:58,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:57:58,183 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:57:58,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 20:57:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:58,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 20:57:58,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:57:58,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 20:57:58,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:57:58,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 20:57:58,546 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 20:57:58,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:57:58,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2021-12-06 20:57:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 20:57:58,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:58,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746769644] [2021-12-06 20:57:58,778 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:57:58,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648044595] [2021-12-06 20:57:58,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648044595] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:57:58,778 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:57:58,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-12-06 20:57:58,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867021329] [2021-12-06 20:57:58,778 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:57:58,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 20:57:58,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:58,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 20:57:58,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-12-06 20:57:58,779 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 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) [2021-12-06 20:57:59,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:59,102 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2021-12-06 20:57:59,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 20:57:59,102 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 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 32 [2021-12-06 20:57:59,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:59,103 INFO L225 Difference]: With dead ends: 91 [2021-12-06 20:57:59,103 INFO L226 Difference]: Without dead ends: 79 [2021-12-06 20:57:59,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-12-06 20:57:59,105 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 61 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:59,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 88 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 138 Invalid, 0 Unknown, 110 Unchecked, 0.2s Time] [2021-12-06 20:57:59,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-06 20:57:59,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 49. [2021-12-06 20:57:59,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 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) [2021-12-06 20:57:59,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-12-06 20:57:59,114 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 32 [2021-12-06 20:57:59,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:59,115 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-12-06 20:57:59,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 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) [2021-12-06 20:57:59,115 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-12-06 20:57:59,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 20:57:59,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:59,116 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:59,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 20:57:59,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:59,318 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:57:59,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:59,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2051071008, now seen corresponding path program 1 times [2021-12-06 20:57:59,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:59,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239351872] [2021-12-06 20:57:59,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:59,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:59,404 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:57:59,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1514774803] [2021-12-06 20:57:59,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:59,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:59,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:57:59,408 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:57:59,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 20:57:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:59,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 20:57:59,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:57:59,594 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 20:57:59,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 102 [2021-12-06 20:57:59,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 20:57:59,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:57:59,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2021-12-06 20:57:59,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:57:59,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2021-12-06 20:57:59,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:57:59,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:57:59,942 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-06 20:57:59,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 54 treesize of output 47 [2021-12-06 20:58:00,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:00,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:58:00,097 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-12-06 20:58:00,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2021-12-06 20:58:00,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:00,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:58:00,340 INFO L354 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2021-12-06 20:58:00,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 98 treesize of output 89 [2021-12-06 20:58:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:58:00,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 10 refuted. 2 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:58:12,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:12,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239351872] [2021-12-06 20:58:12,323 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:58:12,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514774803] [2021-12-06 20:58:12,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514774803] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:12,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:58:12,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-12-06 20:58:12,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466600224] [2021-12-06 20:58:12,324 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:12,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 20:58:12,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:12,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 20:58:12,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=667, Unknown=1, NotChecked=0, Total=812 [2021-12-06 20:58:12,325 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 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) [2021-12-06 20:58:16,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:16,422 INFO L93 Difference]: Finished difference Result 142 states and 173 transitions. [2021-12-06 20:58:16,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 20:58:16,423 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 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 36 [2021-12-06 20:58:16,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:16,424 INFO L225 Difference]: With dead ends: 142 [2021-12-06 20:58:16,424 INFO L226 Difference]: Without dead ends: 100 [2021-12-06 20:58:16,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=189, Invalid=932, Unknown=1, NotChecked=0, Total=1122 [2021-12-06 20:58:16,425 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:16,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 95 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 231 Invalid, 0 Unknown, 147 Unchecked, 0.3s Time] [2021-12-06 20:58:16,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-06 20:58:16,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2021-12-06 20:58:16,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.2125) internal successors, (97), 80 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:16,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2021-12-06 20:58:16,433 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 36 [2021-12-06 20:58:16,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:16,433 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2021-12-06 20:58:16,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 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) [2021-12-06 20:58:16,433 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2021-12-06 20:58:16,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 20:58:16,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:16,435 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:16,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 20:58:16,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:16,636 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:58:16,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:16,637 INFO L85 PathProgramCache]: Analyzing trace with hash 2062198762, now seen corresponding path program 2 times [2021-12-06 20:58:16,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:16,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862119399] [2021-12-06 20:58:16,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:16,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:16,671 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:58:16,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205354003] [2021-12-06 20:58:16,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:58:16,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:16,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:16,672 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:16,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 20:58:16,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:58:16,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:58:16,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 20:58:16,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 20:58:16,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:16,841 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 20:58:16,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:16,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862119399] [2021-12-06 20:58:16,841 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:58:16,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205354003] [2021-12-06 20:58:16,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205354003] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:16,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:58:16,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-06 20:58:16,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637103148] [2021-12-06 20:58:16,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:16,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 20:58:16,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:16,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 20:58:16,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:58:16,843 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:17,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:17,012 INFO L93 Difference]: Finished difference Result 203 states and 243 transitions. [2021-12-06 20:58:17,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 20:58:17,013 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-06 20:58:17,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:17,015 INFO L225 Difference]: With dead ends: 203 [2021-12-06 20:58:17,015 INFO L226 Difference]: Without dead ends: 118 [2021-12-06 20:58:17,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-12-06 20:58:17,017 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 101 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:17,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 67 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:58:17,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-06 20:58:17,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 89. [2021-12-06 20:58:17,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.2272727272727273) internal successors, (108), 88 states have internal predecessors, (108), 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) [2021-12-06 20:58:17,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2021-12-06 20:58:17,028 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 38 [2021-12-06 20:58:17,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:17,028 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2021-12-06 20:58:17,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:17,029 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2021-12-06 20:58:17,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 20:58:17,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:17,030 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:17,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 20:58:17,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:17,230 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:58:17,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:17,231 INFO L85 PathProgramCache]: Analyzing trace with hash 439362629, now seen corresponding path program 2 times [2021-12-06 20:58:17,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:17,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567213000] [2021-12-06 20:58:17,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:17,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 20:58:17,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:17,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567213000] [2021-12-06 20:58:17,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567213000] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:58:17,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819502394] [2021-12-06 20:58:17,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:58:17,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:17,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:17,274 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:17,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 20:58:17,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:58:17,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:58:17,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:58:17,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 20:58:17,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:58:17,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819502394] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:58:17,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:58:17,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-12-06 20:58:17,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916357481] [2021-12-06 20:58:17,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:58:17,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:58:17,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:17,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:58:17,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:58:17,367 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:17,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:17,400 INFO L93 Difference]: Finished difference Result 146 states and 176 transitions. [2021-12-06 20:58:17,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:58:17,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-06 20:58:17,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:17,401 INFO L225 Difference]: With dead ends: 146 [2021-12-06 20:58:17,401 INFO L226 Difference]: Without dead ends: 64 [2021-12-06 20:58:17,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:58:17,402 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:17,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 21 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:58:17,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-06 20:58:17,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2021-12-06 20:58:17,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 56 states have internal predecessors, (62), 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) [2021-12-06 20:58:17,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2021-12-06 20:58:17,407 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 42 [2021-12-06 20:58:17,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:17,407 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2021-12-06 20:58:17,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:17,407 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2021-12-06 20:58:17,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 20:58:17,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:17,408 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:17,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 20:58:17,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 20:58:17,610 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:58:17,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:17,611 INFO L85 PathProgramCache]: Analyzing trace with hash 658217347, now seen corresponding path program 3 times [2021-12-06 20:58:17,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:17,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075378822] [2021-12-06 20:58:17,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:17,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:17,663 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:58:17,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551193509] [2021-12-06 20:58:17,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:58:17,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:17,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:17,664 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:17,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 20:58:17,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 20:58:17,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:58:17,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 20:58:17,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 20:58:17,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 20:58:17,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:17,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075378822] [2021-12-06 20:58:17,984 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:58:17,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551193509] [2021-12-06 20:58:17,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551193509] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:17,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:58:17,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-06 20:58:17,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33793879] [2021-12-06 20:58:17,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:17,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 20:58:17,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:17,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 20:58:17,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:58:17,985 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:18,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:18,133 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2021-12-06 20:58:18,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 20:58:18,133 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-06 20:58:18,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:18,134 INFO L225 Difference]: With dead ends: 79 [2021-12-06 20:58:18,134 INFO L226 Difference]: Without dead ends: 70 [2021-12-06 20:58:18,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-12-06 20:58:18,135 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 150 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:18,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 49 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:58:18,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-06 20:58:18,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2021-12-06 20:58:18,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 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) [2021-12-06 20:58:18,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-12-06 20:58:18,139 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 42 [2021-12-06 20:58:18,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:18,139 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-12-06 20:58:18,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:18,140 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-12-06 20:58:18,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 20:58:18,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:18,140 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:18,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-06 20:58:18,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:18,342 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:58:18,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:18,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1356840755, now seen corresponding path program 3 times [2021-12-06 20:58:18,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:18,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568517433] [2021-12-06 20:58:18,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:18,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:18,408 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:58:18,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315969265] [2021-12-06 20:58:18,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:58:18,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:18,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:18,409 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:18,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 20:58:18,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 20:58:18,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:58:18,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 20:58:18,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:18,921 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 20:58:18,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 20:58:18,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:18,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568517433] [2021-12-06 20:58:18,977 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:58:18,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315969265] [2021-12-06 20:58:18,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315969265] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:18,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:58:18,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-12-06 20:58:18,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933780188] [2021-12-06 20:58:18,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:18,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 20:58:18,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:18,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 20:58:18,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-12-06 20:58:18,978 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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) [2021-12-06 20:58:19,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:19,177 INFO L93 Difference]: Finished difference Result 152 states and 163 transitions. [2021-12-06 20:58:19,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 20:58:19,177 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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 44 [2021-12-06 20:58:19,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:19,178 INFO L225 Difference]: With dead ends: 152 [2021-12-06 20:58:19,178 INFO L226 Difference]: Without dead ends: 122 [2021-12-06 20:58:19,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-12-06 20:58:19,179 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 121 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:19,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 100 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:58:19,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-06 20:58:19,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 86. [2021-12-06 20:58:19,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 85 states have internal predecessors, (93), 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) [2021-12-06 20:58:19,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2021-12-06 20:58:19,185 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 44 [2021-12-06 20:58:19,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:19,185 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2021-12-06 20:58:19,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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) [2021-12-06 20:58:19,185 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2021-12-06 20:58:19,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 20:58:19,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:19,186 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:19,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 20:58:19,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:19,388 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:58:19,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:19,389 INFO L85 PathProgramCache]: Analyzing trace with hash 686844275, now seen corresponding path program 4 times [2021-12-06 20:58:19,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:19,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230963477] [2021-12-06 20:58:19,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:19,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:19,437 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:58:19,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868019427] [2021-12-06 20:58:19,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:58:19,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:19,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:19,439 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:19,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 20:58:19,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:58:19,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:58:19,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 20:58:19,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:19,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 94 [2021-12-06 20:58:19,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 20:58:19,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 49 [2021-12-06 20:58:19,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:19,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:19,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:19,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 60 [2021-12-06 20:58:19,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:19,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 15 [2021-12-06 20:58:19,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:19,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 20:58:20,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-06 20:58:20,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 125 [2021-12-06 20:58:20,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:20,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:20,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:20,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:20,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:58:20,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:20,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:20,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:20,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 153 [2021-12-06 20:58:20,128 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 20:58:20,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:20,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:20,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:20,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 73 [2021-12-06 20:58:20,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:20,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:20,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:20,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 46 [2021-12-06 20:58:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:20,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:25,969 INFO L354 Elim1Store]: treesize reduction 113, result has 35.4 percent of original size [2021-12-06 20:58:25,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 1238 treesize of output 819 [2021-12-06 20:58:25,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:58:25,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 859 treesize of output 821 [2021-12-06 20:58:42,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:58:42,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:58:43,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:58:43,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:58:43,357 INFO L354 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2021-12-06 20:58:43,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 279 treesize of output 265 [2021-12-06 20:58:43,867 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 20:58:43,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:43,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230963477] [2021-12-06 20:58:43,868 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:58:43,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868019427] [2021-12-06 20:58:43,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868019427] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:43,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:58:43,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 31 [2021-12-06 20:58:43,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145269641] [2021-12-06 20:58:43,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:43,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 20:58:43,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:43,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 20:58:43,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-12-06 20:58:43,870 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 31 states have internal predecessors, (79), 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) [2021-12-06 20:58:51,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:51,387 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2021-12-06 20:58:51,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 20:58:51,387 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 31 states have internal predecessors, (79), 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 45 [2021-12-06 20:58:51,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:51,388 INFO L225 Difference]: With dead ends: 116 [2021-12-06 20:58:51,388 INFO L226 Difference]: Without dead ends: 114 [2021-12-06 20:58:51,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=235, Invalid=1170, Unknown=1, NotChecked=0, Total=1406 [2021-12-06 20:58:51,390 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:51,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 108 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 211 Invalid, 0 Unknown, 254 Unchecked, 0.2s Time] [2021-12-06 20:58:51,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-06 20:58:51,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2021-12-06 20:58:51,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0943396226415094) internal successors, (116), 106 states have internal predecessors, (116), 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) [2021-12-06 20:58:51,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions. [2021-12-06 20:58:51,398 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 45 [2021-12-06 20:58:51,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:51,398 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 116 transitions. [2021-12-06 20:58:51,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 31 states have internal predecessors, (79), 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) [2021-12-06 20:58:51,398 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions. [2021-12-06 20:58:51,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 20:58:51,399 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:51,399 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:51,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-06 20:58:51,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:51,601 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:58:51,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:51,603 INFO L85 PathProgramCache]: Analyzing trace with hash 132233513, now seen corresponding path program 5 times [2021-12-06 20:58:51,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:51,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755790482] [2021-12-06 20:58:51,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:51,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:51,631 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:58:51,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668851185] [2021-12-06 20:58:51,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:58:51,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:51,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:51,633 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:51,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3538f9-7a2a-4e66-9918-7963f8309374/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 20:58:52,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 20:58:52,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:58:52,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-06 20:58:52,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:52,583 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 20:58:52,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 50 [2021-12-06 20:58:52,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 20:58:52,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 49 [2021-12-06 20:58:52,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:52,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:52,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:52,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 60 [2021-12-06 20:58:52,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:52,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 17 [2021-12-06 20:58:52,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:52,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 20:58:52,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-06 20:58:52,848 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 20:58:52,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 125 [2021-12-06 20:58:52,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:58:52,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:52,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:52,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:52,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:52,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:52,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:52,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 153 [2021-12-06 20:58:52,904 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 20:58:52,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:52,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:52,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:52,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 73 [2021-12-06 20:58:53,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:53,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:53,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:53,011 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 20:58:53,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 44 [2021-12-06 20:58:53,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:53,093 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-12-06 20:58:53,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 44 [2021-12-06 20:58:53,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 135 [2021-12-06 20:58:53,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:53,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:53,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:53,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:53,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:58:53,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:53,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:53,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:53,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 156 [2021-12-06 20:58:53,188 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 20:58:53,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:53,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:53,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:53,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 50 [2021-12-06 20:58:53,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:53,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:53,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:53,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:53,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:58:53,333 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-06 20:58:53,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 56 [2021-12-06 20:58:53,639 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-12-06 20:58:53,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 41 [2021-12-06 20:58:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:58:53,664 INFO L328 TraceCheckSpWp]: Computing backward predicates...