./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0235-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0235-3.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 05:52:00,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 05:52:00,215 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 05:52:00,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 05:52:00,255 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 05:52:00,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 05:52:00,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 05:52:00,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 05:52:00,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 05:52:00,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 05:52:00,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 05:52:00,269 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 05:52:00,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 05:52:00,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 05:52:00,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 05:52:00,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 05:52:00,278 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 05:52:00,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 05:52:00,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 05:52:00,282 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 05:52:00,284 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 05:52:00,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 05:52:00,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 05:52:00,287 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 05:52:00,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 05:52:00,292 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 05:52:00,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 05:52:00,293 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 05:52:00,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 05:52:00,294 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 05:52:00,294 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 05:52:00,295 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 05:52:00,296 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 05:52:00,296 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 05:52:00,297 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 05:52:00,297 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 05:52:00,298 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 05:52:00,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 05:52:00,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 05:52:00,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 05:52:00,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 05:52:00,300 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 05:52:00,326 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 05:52:00,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 05:52:00,327 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 05:52:00,327 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 05:52:00,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 05:52:00,328 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 05:52:00,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 05:52:00,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 05:52:00,329 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 05:52:00,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 05:52:00,330 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 05:52:00,330 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 05:52:00,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 05:52:00,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 05:52:00,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 05:52:00,331 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 05:52:00,331 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 05:52:00,331 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 05:52:00,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 05:52:00,332 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 05:52:00,332 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 05:52:00,332 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 05:52:00,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 05:52:00,332 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 05:52:00,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 05:52:00,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:52:00,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 05:52:00,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 05:52:00,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 05:52:00,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 05:52:00,334 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 05:52:00,334 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 [2021-12-16 05:52:00,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 05:52:00,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 05:52:00,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 05:52:00,531 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 05:52:00,531 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 05:52:00,532 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0235-3.i [2021-12-16 05:52:00,570 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45a458042/7f81aeb06e4f4adbb7f811354ed7e73c/FLAG460297388 [2021-12-16 05:52:00,989 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 05:52:00,990 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0235-3.i [2021-12-16 05:52:01,001 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45a458042/7f81aeb06e4f4adbb7f811354ed7e73c/FLAG460297388 [2021-12-16 05:52:01,013 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45a458042/7f81aeb06e4f4adbb7f811354ed7e73c [2021-12-16 05:52:01,015 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 05:52:01,017 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 05:52:01,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 05:52:01,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 05:52:01,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 05:52:01,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:52:01" (1/1) ... [2021-12-16 05:52:01,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63896f05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:01, skipping insertion in model container [2021-12-16 05:52:01,023 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:52:01" (1/1) ... [2021-12-16 05:52:01,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 05:52:01,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:52:01,301 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:52:01,306 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 05:52:01,364 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:52:01,387 INFO L208 MainTranslator]: Completed translation [2021-12-16 05:52:01,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:01 WrapperNode [2021-12-16 05:52:01,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 05:52:01,388 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 05:52:01,389 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 05:52:01,389 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 05:52:01,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:01" (1/1) ... [2021-12-16 05:52:01,415 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:01" (1/1) ... [2021-12-16 05:52:01,441 INFO L137 Inliner]: procedures = 188, calls = 73, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 240 [2021-12-16 05:52:01,441 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 05:52:01,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 05:52:01,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 05:52:01,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 05:52:01,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:01" (1/1) ... [2021-12-16 05:52:01,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:01" (1/1) ... [2021-12-16 05:52:01,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:01" (1/1) ... [2021-12-16 05:52:01,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:01" (1/1) ... [2021-12-16 05:52:01,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:01" (1/1) ... [2021-12-16 05:52:01,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:01" (1/1) ... [2021-12-16 05:52:01,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:01" (1/1) ... [2021-12-16 05:52:01,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 05:52:01,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 05:52:01,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 05:52:01,472 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 05:52:01,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:01" (1/1) ... [2021-12-16 05:52:01,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:52:01,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:52:01,502 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 05:52:01,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 05:52:01,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 05:52:01,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 05:52:01,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 05:52:01,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 05:52:01,532 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2021-12-16 05:52:01,532 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2021-12-16 05:52:01,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 05:52:01,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 05:52:01,532 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2021-12-16 05:52:01,533 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2021-12-16 05:52:01,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 05:52:01,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 05:52:01,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 05:52:01,636 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 05:52:01,638 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 05:52:01,973 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 05:52:01,982 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 05:52:01,982 INFO L301 CfgBuilder]: Removed 10 assume(true) statements. [2021-12-16 05:52:01,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:52:01 BoogieIcfgContainer [2021-12-16 05:52:01,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 05:52:01,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 05:52:01,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 05:52:01,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 05:52:01,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:52:01" (1/3) ... [2021-12-16 05:52:01,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67f8031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:52:01, skipping insertion in model container [2021-12-16 05:52:01,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:01" (2/3) ... [2021-12-16 05:52:01,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67f8031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:52:01, skipping insertion in model container [2021-12-16 05:52:01,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:52:01" (3/3) ... [2021-12-16 05:52:01,989 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0235-3.i [2021-12-16 05:52:01,992 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 05:52:01,992 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 89 error locations. [2021-12-16 05:52:02,030 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 05:52:02,036 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-12-16 05:52:02,036 INFO L340 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2021-12-16 05:52:02,052 INFO L276 IsEmpty]: Start isEmpty. Operand has 243 states, 138 states have (on average 1.8768115942028984) internal successors, (259), 227 states have internal predecessors, (259), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-16 05:52:02,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-16 05:52:02,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:52:02,071 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-16 05:52:02,071 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-16 05:52:02,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:52:02,075 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2021-12-16 05:52:02,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:52:02,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963251336] [2021-12-16 05:52:02,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:02,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:52:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:52:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:52:02,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:52:02,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963251336] [2021-12-16 05:52:02,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963251336] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:52:02,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:52:02,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:52:02,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444741129] [2021-12-16 05:52:02,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:52:02,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 05:52:02,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:52:02,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 05:52:02,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 05:52:02,216 INFO L87 Difference]: Start difference. First operand has 243 states, 138 states have (on average 1.8768115942028984) internal successors, (259), 227 states have internal predecessors, (259), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-12-16 05:52:02,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:52:02,250 INFO L93 Difference]: Finished difference Result 243 states and 274 transitions. [2021-12-16 05:52:02,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 05:52:02,252 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-12-16 05:52:02,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:52:02,260 INFO L225 Difference]: With dead ends: 243 [2021-12-16 05:52:02,261 INFO L226 Difference]: Without dead ends: 241 [2021-12-16 05:52:02,266 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 [2021-12-16 05:52:02,269 INFO L933 BasicCegarLoop]: 274 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, 274 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 [2021-12-16 05:52:02,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:52:02,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-12-16 05:52:02,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2021-12-16 05:52:02,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 137 states have (on average 1.7956204379562044) internal successors, (246), 225 states have internal predecessors, (246), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-16 05:52:02,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 272 transitions. [2021-12-16 05:52:02,322 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 272 transitions. Word has length 4 [2021-12-16 05:52:02,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:52:02,323 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 272 transitions. [2021-12-16 05:52:02,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-12-16 05:52:02,323 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 272 transitions. [2021-12-16 05:52:02,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 05:52:02,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:52:02,324 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 05:52:02,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 05:52:02,324 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-16 05:52:02,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:52:02,325 INFO L85 PathProgramCache]: Analyzing trace with hash 889942911, now seen corresponding path program 1 times [2021-12-16 05:52:02,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:52:02,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666141166] [2021-12-16 05:52:02,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:02,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:52:02,353 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:52:02,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832965052] [2021-12-16 05:52:02,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:02,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:52:02,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:52:02,357 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:52:02,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 05:52:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:52:02,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 05:52:02,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:52:02,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:52:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:52:02,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:52:02,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:52:02,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666141166] [2021-12-16 05:52:02,485 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 05:52:02,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832965052] [2021-12-16 05:52:02,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832965052] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:52:02,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:52:02,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:52:02,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194608242] [2021-12-16 05:52:02,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:52:02,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:52:02,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:52:02,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:52:02,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:52:02,488 INFO L87 Difference]: Start difference. First operand 241 states and 272 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:52:02,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:52:02,618 INFO L93 Difference]: Finished difference Result 240 states and 271 transitions. [2021-12-16 05:52:02,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:52:02,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-16 05:52:02,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:52:02,620 INFO L225 Difference]: With dead ends: 240 [2021-12-16 05:52:02,620 INFO L226 Difference]: Without dead ends: 240 [2021-12-16 05:52:02,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:52:02,622 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 9 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:52:02,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 438 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:52:02,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-16 05:52:02,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2021-12-16 05:52:02,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 137 states have (on average 1.7883211678832116) internal successors, (245), 224 states have internal predecessors, (245), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-16 05:52:02,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 271 transitions. [2021-12-16 05:52:02,630 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 271 transitions. Word has length 6 [2021-12-16 05:52:02,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:52:02,631 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 271 transitions. [2021-12-16 05:52:02,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:52:02,631 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 271 transitions. [2021-12-16 05:52:02,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 05:52:02,631 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:52:02,631 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:52:02,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 05:52:02,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:52:02,854 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-16 05:52:02,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:52:02,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1818426896, now seen corresponding path program 1 times [2021-12-16 05:52:02,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:52:02,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062248330] [2021-12-16 05:52:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:02,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:52:02,862 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:52:02,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [703395280] [2021-12-16 05:52:02,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:02,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:52:02,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:52:02,864 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:52:02,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 05:52:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:52:02,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 05:52:02,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:52:02,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:52:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:52:03,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:52:03,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:52:03,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062248330] [2021-12-16 05:52:03,053 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 05:52:03,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703395280] [2021-12-16 05:52:03,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703395280] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:52:03,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:52:03,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:52:03,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212412956] [2021-12-16 05:52:03,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:52:03,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:52:03,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:52:03,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:52:03,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:52:03,056 INFO L87 Difference]: Start difference. First operand 240 states and 271 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:52:03,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:52:03,069 INFO L93 Difference]: Finished difference Result 239 states and 270 transitions. [2021-12-16 05:52:03,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:52:03,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-16 05:52:03,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:52:03,070 INFO L225 Difference]: With dead ends: 239 [2021-12-16 05:52:03,071 INFO L226 Difference]: Without dead ends: 239 [2021-12-16 05:52:03,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:52:03,073 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 0 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:52:03,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 463 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 74 Unchecked, 0.0s Time] [2021-12-16 05:52:03,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-16 05:52:03,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2021-12-16 05:52:03,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 137 states have (on average 1.781021897810219) internal successors, (244), 223 states have internal predecessors, (244), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-16 05:52:03,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 270 transitions. [2021-12-16 05:52:03,087 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 270 transitions. Word has length 7 [2021-12-16 05:52:03,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:52:03,087 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 270 transitions. [2021-12-16 05:52:03,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:52:03,087 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 270 transitions. [2021-12-16 05:52:03,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-16 05:52:03,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:52:03,089 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:52:03,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 05:52:03,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-16 05:52:03,289 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-16 05:52:03,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:52:03,290 INFO L85 PathProgramCache]: Analyzing trace with hash 946384938, now seen corresponding path program 1 times [2021-12-16 05:52:03,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:52:03,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917255721] [2021-12-16 05:52:03,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:03,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:52:03,306 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:52:03,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557034405] [2021-12-16 05:52:03,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:03,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:52:03,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:52:03,309 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:52:03,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 05:52:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:52:03,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-16 05:52:03,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:52:03,714 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:52:03,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 05:52:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-16 05:52:03,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:52:03,904 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-16 05:52:03,905 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 12 treesize of output 11 [2021-12-16 05:52:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-16 05:52:03,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:52:03,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917255721] [2021-12-16 05:52:03,962 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 05:52:03,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557034405] [2021-12-16 05:52:03,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557034405] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:52:03,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:52:03,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-12-16 05:52:03,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485932115] [2021-12-16 05:52:03,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:52:03,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 05:52:03,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:52:03,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 05:52:03,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-16 05:52:03,964 INFO L87 Difference]: Start difference. First operand 239 states and 270 transitions. Second operand has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 05:52:12,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:52:12,443 INFO L93 Difference]: Finished difference Result 258 states and 294 transitions. [2021-12-16 05:52:12,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 05:52:12,443 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2021-12-16 05:52:12,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:52:12,445 INFO L225 Difference]: With dead ends: 258 [2021-12-16 05:52:12,445 INFO L226 Difference]: Without dead ends: 258 [2021-12-16 05:52:12,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 131 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-12-16 05:52:12,446 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 99 mSDsluCounter, 1724 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1966 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:52:12,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 1966 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 681 Invalid, 0 Unknown, 262 Unchecked, 0.3s Time] [2021-12-16 05:52:12,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-16 05:52:12,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 248. [2021-12-16 05:52:12,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 146 states have (on average 1.7397260273972603) internal successors, (254), 230 states have internal predecessors, (254), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2021-12-16 05:52:12,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 281 transitions. [2021-12-16 05:52:12,468 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 281 transitions. Word has length 73 [2021-12-16 05:52:12,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:52:12,469 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 281 transitions. [2021-12-16 05:52:12,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 05:52:12,470 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 281 transitions. [2021-12-16 05:52:12,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-16 05:52:12,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:52:12,472 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:52:12,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 05:52:12,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:52:12,683 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-16 05:52:12,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:52:12,684 INFO L85 PathProgramCache]: Analyzing trace with hash 946384939, now seen corresponding path program 1 times [2021-12-16 05:52:12,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:52:12,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994855542] [2021-12-16 05:52:12,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:12,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:52:12,695 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:52:12,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831597844] [2021-12-16 05:52:12,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:12,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:52:12,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:52:12,701 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:52:12,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 05:52:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:52:12,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-16 05:52:12,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:52:13,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:52:13,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-16 05:52:13,522 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:52:13,522 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 11 treesize of output 11 [2021-12-16 05:52:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-16 05:52:13,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:52:13,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:52:13,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994855542] [2021-12-16 05:52:13,648 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 05:52:13,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831597844] [2021-12-16 05:52:13,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831597844] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:52:13,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:52:13,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-12-16 05:52:13,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18518390] [2021-12-16 05:52:13,648 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-16 05:52:13,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 05:52:13,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:52:13,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 05:52:13,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-12-16 05:52:13,649 INFO L87 Difference]: Start difference. First operand 248 states and 281 transitions. Second operand has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 05:52:14,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:52:14,006 INFO L93 Difference]: Finished difference Result 358 states and 419 transitions. [2021-12-16 05:52:14,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 05:52:14,006 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 73 [2021-12-16 05:52:14,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:52:14,008 INFO L225 Difference]: With dead ends: 358 [2021-12-16 05:52:14,008 INFO L226 Difference]: Without dead ends: 358 [2021-12-16 05:52:14,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-12-16 05:52:14,009 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 110 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 2599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2347 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:52:14,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1686 Invalid, 2599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 239 Invalid, 0 Unknown, 2347 Unchecked, 0.2s Time] [2021-12-16 05:52:14,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-12-16 05:52:14,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 257. [2021-12-16 05:52:14,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 153 states have (on average 1.7124183006535947) internal successors, (262), 237 states have internal predecessors, (262), 14 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (21), 16 states have call predecessors, (21), 14 states have call successors, (21) [2021-12-16 05:52:14,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 297 transitions. [2021-12-16 05:52:14,017 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 297 transitions. Word has length 73 [2021-12-16 05:52:14,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:52:14,017 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 297 transitions. [2021-12-16 05:52:14,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 05:52:14,018 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 297 transitions. [2021-12-16 05:52:14,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-16 05:52:14,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:52:14,019 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:52:14,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 05:52:14,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:52:14,235 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-16 05:52:14,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:52:14,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1621005114, now seen corresponding path program 1 times [2021-12-16 05:52:14,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:52:14,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686450169] [2021-12-16 05:52:14,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:14,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:52:14,252 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:52:14,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951724753] [2021-12-16 05:52:14,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:14,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:52:14,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:52:14,268 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:52:14,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 05:52:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:52:14,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 05:52:14,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:52:14,489 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-16 05:52:14,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:52:14,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:52:14,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686450169] [2021-12-16 05:52:14,490 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 05:52:14,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951724753] [2021-12-16 05:52:14,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951724753] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:52:14,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:52:14,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:52:14,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89905390] [2021-12-16 05:52:14,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:52:14,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:52:14,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:52:14,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:52:14,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:52:14,492 INFO L87 Difference]: Start difference. First operand 257 states and 297 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 05:52:14,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:52:14,533 INFO L93 Difference]: Finished difference Result 253 states and 284 transitions. [2021-12-16 05:52:14,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:52:14,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 74 [2021-12-16 05:52:14,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:52:14,534 INFO L225 Difference]: With dead ends: 253 [2021-12-16 05:52:14,535 INFO L226 Difference]: Without dead ends: 243 [2021-12-16 05:52:14,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:52:14,535 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 17 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:52:14,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 766 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:52:14,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-16 05:52:14,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2021-12-16 05:52:14,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 138 states have (on average 1.7681159420289856) internal successors, (244), 223 states have internal predecessors, (244), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-16 05:52:14,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 270 transitions. [2021-12-16 05:52:14,543 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 270 transitions. Word has length 74 [2021-12-16 05:52:14,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:52:14,543 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 270 transitions. [2021-12-16 05:52:14,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 05:52:14,543 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 270 transitions. [2021-12-16 05:52:14,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-16 05:52:14,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:52:14,545 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:52:14,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 05:52:14,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:52:14,759 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-16 05:52:14,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:52:14,760 INFO L85 PathProgramCache]: Analyzing trace with hash -494526098, now seen corresponding path program 1 times [2021-12-16 05:52:14,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:52:14,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944372736] [2021-12-16 05:52:14,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:14,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:52:14,773 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:52:14,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934220168] [2021-12-16 05:52:14,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:14,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:52:14,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:52:14,777 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:52:14,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 05:52:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:52:14,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-16 05:52:14,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:52:15,125 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:52:15,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 05:52:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 93 proven. 11 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-16 05:52:15,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:52:15,308 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-16 05:52:15,308 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 12 treesize of output 11 [2021-12-16 05:52:15,367 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 93 proven. 11 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-16 05:52:15,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:52:15,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944372736] [2021-12-16 05:52:15,368 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 05:52:15,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934220168] [2021-12-16 05:52:15,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934220168] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:52:15,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:52:15,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-12-16 05:52:15,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217951455] [2021-12-16 05:52:15,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:52:15,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 05:52:15,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:52:15,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 05:52:15,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-16 05:52:15,370 INFO L87 Difference]: Start difference. First operand 239 states and 270 transitions. Second operand has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 05:52:23,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:52:23,770 INFO L93 Difference]: Finished difference Result 257 states and 292 transitions. [2021-12-16 05:52:23,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 05:52:23,771 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 79 [2021-12-16 05:52:23,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:52:23,772 INFO L225 Difference]: With dead ends: 257 [2021-12-16 05:52:23,772 INFO L226 Difference]: Without dead ends: 257 [2021-12-16 05:52:23,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 142 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-12-16 05:52:23,773 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 98 mSDsluCounter, 1886 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 2127 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:52:23,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 2127 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 674 Invalid, 0 Unknown, 263 Unchecked, 0.3s Time] [2021-12-16 05:52:23,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-16 05:52:23,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 248. [2021-12-16 05:52:23,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 147 states have (on average 1.7210884353741496) internal successors, (253), 231 states have internal predecessors, (253), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-16 05:52:23,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 279 transitions. [2021-12-16 05:52:23,779 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 279 transitions. Word has length 79 [2021-12-16 05:52:23,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:52:23,779 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 279 transitions. [2021-12-16 05:52:23,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 05:52:23,780 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 279 transitions. [2021-12-16 05:52:23,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-16 05:52:23,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:52:23,781 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:52:23,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 05:52:23,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:52:23,995 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-16 05:52:23,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:52:23,996 INFO L85 PathProgramCache]: Analyzing trace with hash -494526097, now seen corresponding path program 2 times [2021-12-16 05:52:23,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:52:23,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151702810] [2021-12-16 05:52:23,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:23,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:52:24,011 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:52:24,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842449500] [2021-12-16 05:52:24,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:52:24,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:52:24,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:52:24,013 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:52:24,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 05:52:24,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:52:24,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:52:24,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-16 05:52:24,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:52:24,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-16 05:52:24,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:52:24,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-16 05:52:24,685 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:52:24,685 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 11 treesize of output 11 [2021-12-16 05:52:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 93 proven. 11 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-16 05:52:24,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:52:24,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:52:24,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151702810] [2021-12-16 05:52:24,789 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 05:52:24,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842449500] [2021-12-16 05:52:24,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842449500] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:52:24,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:52:24,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-16 05:52:24,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823101705] [2021-12-16 05:52:24,789 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-16 05:52:24,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 05:52:24,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:52:24,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 05:52:24,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-16 05:52:24,790 INFO L87 Difference]: Start difference. First operand 248 states and 279 transitions. Second operand has 12 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 05:52:25,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:52:25,873 INFO L93 Difference]: Finished difference Result 348 states and 400 transitions. [2021-12-16 05:52:25,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 05:52:25,874 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 79 [2021-12-16 05:52:25,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:52:25,875 INFO L225 Difference]: With dead ends: 348 [2021-12-16 05:52:25,875 INFO L226 Difference]: Without dead ends: 348 [2021-12-16 05:52:25,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-12-16 05:52:25,876 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 110 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 1973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 749 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 05:52:25,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 936 Invalid, 1973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1211 Invalid, 0 Unknown, 749 Unchecked, 0.9s Time] [2021-12-16 05:52:25,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-12-16 05:52:25,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 247. [2021-12-16 05:52:25,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 147 states have (on average 1.7142857142857142) internal successors, (252), 230 states have internal predecessors, (252), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-16 05:52:25,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 278 transitions. [2021-12-16 05:52:25,882 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 278 transitions. Word has length 79 [2021-12-16 05:52:25,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:52:25,888 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 278 transitions. [2021-12-16 05:52:25,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 05:52:25,888 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 278 transitions. [2021-12-16 05:52:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-16 05:52:25,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:52:25,891 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:52:25,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 05:52:26,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:52:26,091 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-16 05:52:26,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:52:26,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1501789903, now seen corresponding path program 1 times [2021-12-16 05:52:26,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:52:26,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438090733] [2021-12-16 05:52:26,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:26,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:52:26,104 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:52:26,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995142994] [2021-12-16 05:52:26,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:26,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:52:26,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:52:26,105 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:52:26,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 05:52:26,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:52:26,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-16 05:52:26,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:52:26,442 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:52:26,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 05:52:26,531 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:52:26,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 05:52:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 107 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-16 05:52:26,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:52:26,828 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-16 05:52:26,828 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 12 treesize of output 11 [2021-12-16 05:52:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 107 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-16 05:52:26,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:52:26,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438090733] [2021-12-16 05:52:26,875 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 05:52:26,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995142994] [2021-12-16 05:52:26,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995142994] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:52:26,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:52:26,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2021-12-16 05:52:26,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128813832] [2021-12-16 05:52:26,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:52:26,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 05:52:26,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:52:26,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 05:52:26,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-12-16 05:52:26,879 INFO L87 Difference]: Start difference. First operand 247 states and 278 transitions. Second operand has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 05:52:35,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:52:35,360 INFO L93 Difference]: Finished difference Result 282 states and 319 transitions. [2021-12-16 05:52:35,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 05:52:35,360 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 81 [2021-12-16 05:52:35,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:52:35,362 INFO L225 Difference]: With dead ends: 282 [2021-12-16 05:52:35,362 INFO L226 Difference]: Without dead ends: 282 [2021-12-16 05:52:35,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 141 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-12-16 05:52:35,362 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 150 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1918 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:52:35,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 1918 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 776 Invalid, 0 Unknown, 256 Unchecked, 0.3s Time] [2021-12-16 05:52:35,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-12-16 05:52:35,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 273. [2021-12-16 05:52:35,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 170 states have (on average 1.6294117647058823) internal successors, (277), 252 states have internal predecessors, (277), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-16 05:52:35,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 307 transitions. [2021-12-16 05:52:35,369 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 307 transitions. Word has length 81 [2021-12-16 05:52:35,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:52:35,370 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 307 transitions. [2021-12-16 05:52:35,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 05:52:35,370 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 307 transitions. [2021-12-16 05:52:35,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-16 05:52:35,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:52:35,371 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:52:35,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 05:52:35,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-16 05:52:35,575 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-16 05:52:35,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:52:35,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1501789904, now seen corresponding path program 1 times [2021-12-16 05:52:35,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:52:35,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114162505] [2021-12-16 05:52:35,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:35,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:52:35,588 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:52:35,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613118124] [2021-12-16 05:52:35,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:35,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:52:35,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:52:35,590 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:52:35,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 05:52:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:52:35,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-16 05:52:35,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:52:35,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-16 05:52:36,401 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-16 05:52:36,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-16 05:52:36,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-16 05:52:36,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:52:36,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 [2021-12-16 05:52:36,581 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-16 05:52:36,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-16 05:52:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 107 proven. 33 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-16 05:52:36,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:52:36,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:52:36,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114162505] [2021-12-16 05:52:36,752 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 05:52:36,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613118124] [2021-12-16 05:52:36,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613118124] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:52:36,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:52:36,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-12-16 05:52:36,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180894459] [2021-12-16 05:52:36,752 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-16 05:52:36,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 05:52:36,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:52:36,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 05:52:36,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-12-16 05:52:36,754 INFO L87 Difference]: Start difference. First operand 273 states and 307 transitions. Second operand has 16 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-16 05:52:37,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:52:37,945 INFO L93 Difference]: Finished difference Result 374 states and 428 transitions. [2021-12-16 05:52:37,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 05:52:37,945 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 81 [2021-12-16 05:52:37,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:52:37,947 INFO L225 Difference]: With dead ends: 374 [2021-12-16 05:52:37,947 INFO L226 Difference]: Without dead ends: 374 [2021-12-16 05:52:37,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-12-16 05:52:37,948 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 111 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 2249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1040 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:52:37,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 1148 Invalid, 2249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1195 Invalid, 0 Unknown, 1040 Unchecked, 1.0s Time] [2021-12-16 05:52:37,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-12-16 05:52:37,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 273. [2021-12-16 05:52:37,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 170 states have (on average 1.6235294117647059) internal successors, (276), 252 states have internal predecessors, (276), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-16 05:52:37,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 306 transitions. [2021-12-16 05:52:37,954 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 306 transitions. Word has length 81 [2021-12-16 05:52:37,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:52:37,954 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 306 transitions. [2021-12-16 05:52:37,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-16 05:52:37,954 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 306 transitions. [2021-12-16 05:52:37,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-16 05:52:37,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:52:37,955 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:52:37,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 05:52:38,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-16 05:52:38,173 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-16 05:52:38,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:52:38,173 INFO L85 PathProgramCache]: Analyzing trace with hash -689153251, now seen corresponding path program 1 times [2021-12-16 05:52:38,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:52:38,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352118777] [2021-12-16 05:52:38,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:38,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:52:38,190 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:52:38,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376916616] [2021-12-16 05:52:38,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:38,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:52:38,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:52:38,191 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:52:38,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 05:52:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:52:38,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 05:52:38,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:52:38,482 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-16 05:52:38,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:52:38,516 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 7 treesize of output 5 [2021-12-16 05:52:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-16 05:52:38,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:52:38,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352118777] [2021-12-16 05:52:38,646 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 05:52:38,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376916616] [2021-12-16 05:52:38,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376916616] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:52:38,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:52:38,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-16 05:52:38,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756972236] [2021-12-16 05:52:38,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:52:38,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 05:52:38,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:52:38,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 05:52:38,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:52:38,648 INFO L87 Difference]: Start difference. First operand 273 states and 306 transitions. Second operand has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 05:52:38,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:52:38,818 INFO L93 Difference]: Finished difference Result 291 states and 331 transitions. [2021-12-16 05:52:38,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 05:52:38,819 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 82 [2021-12-16 05:52:38,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:52:38,820 INFO L225 Difference]: With dead ends: 291 [2021-12-16 05:52:38,820 INFO L226 Difference]: Without dead ends: 291 [2021-12-16 05:52:38,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-16 05:52:38,821 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 225 mSDsluCounter, 1330 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:52:38,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 1565 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:52:38,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-12-16 05:52:38,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 272. [2021-12-16 05:52:38,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 170 states have (on average 1.6176470588235294) internal successors, (275), 251 states have internal predecessors, (275), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-16 05:52:38,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 305 transitions. [2021-12-16 05:52:38,826 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 305 transitions. Word has length 82 [2021-12-16 05:52:38,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:52:38,826 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 305 transitions. [2021-12-16 05:52:38,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 05:52:38,827 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 305 transitions. [2021-12-16 05:52:38,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-16 05:52:38,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:52:38,827 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:52:38,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 05:52:39,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-16 05:52:39,038 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-16 05:52:39,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:52:39,040 INFO L85 PathProgramCache]: Analyzing trace with hash -851311138, now seen corresponding path program 1 times [2021-12-16 05:52:39,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:52:39,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121636876] [2021-12-16 05:52:39,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:39,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:52:39,056 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:52:39,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [613314247] [2021-12-16 05:52:39,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:39,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:52:39,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:52:39,057 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:52:39,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 05:52:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:52:39,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 05:52:39,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:52:39,286 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-16 05:52:39,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:52:39,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:52:39,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121636876] [2021-12-16 05:52:39,286 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 05:52:39,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613314247] [2021-12-16 05:52:39,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613314247] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:52:39,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:52:39,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:52:39,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429596244] [2021-12-16 05:52:39,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:52:39,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:52:39,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:52:39,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:52:39,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:52:39,288 INFO L87 Difference]: Start difference. First operand 272 states and 305 transitions. Second operand has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 05:52:39,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:52:39,388 INFO L93 Difference]: Finished difference Result 279 states and 316 transitions. [2021-12-16 05:52:39,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:52:39,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 84 [2021-12-16 05:52:39,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:52:39,389 INFO L225 Difference]: With dead ends: 279 [2021-12-16 05:52:39,390 INFO L226 Difference]: Without dead ends: 279 [2021-12-16 05:52:39,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:52:39,391 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 98 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:52:39,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 361 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:52:39,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-16 05:52:39,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 271. [2021-12-16 05:52:39,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 170 states have (on average 1.611764705882353) internal successors, (274), 250 states have internal predecessors, (274), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-16 05:52:39,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 304 transitions. [2021-12-16 05:52:39,400 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 304 transitions. Word has length 84 [2021-12-16 05:52:39,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:52:39,400 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 304 transitions. [2021-12-16 05:52:39,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 05:52:39,400 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 304 transitions. [2021-12-16 05:52:39,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-16 05:52:39,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:52:39,401 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:52:39,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 05:52:39,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-16 05:52:39,609 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-16 05:52:39,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:52:39,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1360346043, now seen corresponding path program 1 times [2021-12-16 05:52:39,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:52:39,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752495139] [2021-12-16 05:52:39,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:39,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:52:39,620 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:52:39,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702554869] [2021-12-16 05:52:39,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:39,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:52:39,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:52:39,622 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:52:39,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 05:52:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:52:39,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-16 05:52:39,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:52:39,976 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-16 05:52:39,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-16 05:52:40,088 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-16 05:52:40,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-16 05:52:40,224 INFO L354 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2021-12-16 05:52:40,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2021-12-16 05:52:40,294 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 97 proven. 66 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-16 05:52:40,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:52:40,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:52:40,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752495139] [2021-12-16 05:52:40,497 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 05:52:40,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702554869] [2021-12-16 05:52:40,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702554869] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:52:40,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:52:40,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-12-16 05:52:40,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73252444] [2021-12-16 05:52:40,498 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-16 05:52:40,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 05:52:40,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:52:40,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 05:52:40,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-12-16 05:52:40,499 INFO L87 Difference]: Start difference. First operand 271 states and 304 transitions. Second operand has 17 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-16 05:52:44,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:52:44,923 INFO L93 Difference]: Finished difference Result 342 states and 386 transitions. [2021-12-16 05:52:44,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 05:52:44,924 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 88 [2021-12-16 05:52:44,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:52:44,925 INFO L225 Difference]: With dead ends: 342 [2021-12-16 05:52:44,925 INFO L226 Difference]: Without dead ends: 342 [2021-12-16 05:52:44,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-12-16 05:52:44,926 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 133 mSDsluCounter, 2011 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 2252 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 390 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:52:44,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 2252 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 691 Invalid, 0 Unknown, 390 Unchecked, 0.3s Time] [2021-12-16 05:52:44,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-16 05:52:44,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 335. [2021-12-16 05:52:44,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 225 states have (on average 1.4977777777777779) internal successors, (337), 305 states have internal predecessors, (337), 20 states have call successors, (20), 9 states have call predecessors, (20), 9 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-16 05:52:44,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 377 transitions. [2021-12-16 05:52:44,932 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 377 transitions. Word has length 88 [2021-12-16 05:52:44,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:52:44,932 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 377 transitions. [2021-12-16 05:52:44,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-16 05:52:44,932 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 377 transitions. [2021-12-16 05:52:44,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-16 05:52:44,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:52:44,932 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:52:44,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 05:52:45,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-16 05:52:45,148 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-16 05:52:45,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:52:45,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1360346042, now seen corresponding path program 1 times [2021-12-16 05:52:45,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:52:45,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266117981] [2021-12-16 05:52:45,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:45,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:52:45,162 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:52:45,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128111855] [2021-12-16 05:52:45,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:45,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:52:45,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:52:45,163 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:52:45,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 05:52:45,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:52:45,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-16 05:52:45,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:52:45,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:52:45,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:52:45,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-16 05:52:45,922 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:52:45,922 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 11 treesize of output 11 [2021-12-16 05:52:45,944 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 19 treesize of output 15 [2021-12-16 05:52:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 90 proven. 22 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-16 05:52:45,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:52:46,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:52:46,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266117981] [2021-12-16 05:52:46,081 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 05:52:46,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128111855] [2021-12-16 05:52:46,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128111855] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:52:46,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:52:46,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-12-16 05:52:46,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045476348] [2021-12-16 05:52:46,082 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-16 05:52:46,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 05:52:46,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:52:46,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 05:52:46,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-12-16 05:52:46,083 INFO L87 Difference]: Start difference. First operand 335 states and 377 transitions. Second operand has 17 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 05:52:47,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:52:47,412 INFO L93 Difference]: Finished difference Result 496 states and 576 transitions. [2021-12-16 05:52:47,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 05:52:47,412 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 88 [2021-12-16 05:52:47,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:52:47,414 INFO L225 Difference]: With dead ends: 496 [2021-12-16 05:52:47,414 INFO L226 Difference]: Without dead ends: 474 [2021-12-16 05:52:47,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-12-16 05:52:47,414 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 110 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 2221 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 2551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 314 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:52:47,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1100 Invalid, 2551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2221 Invalid, 0 Unknown, 314 Unchecked, 1.1s Time] [2021-12-16 05:52:47,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-12-16 05:52:47,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 349. [2021-12-16 05:52:47,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 237 states have (on average 1.481012658227848) internal successors, (351), 319 states have internal predecessors, (351), 20 states have call successors, (20), 9 states have call predecessors, (20), 11 states have return successors, (25), 20 states have call predecessors, (25), 20 states have call successors, (25) [2021-12-16 05:52:47,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 396 transitions. [2021-12-16 05:52:47,433 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 396 transitions. Word has length 88 [2021-12-16 05:52:47,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:52:47,433 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 396 transitions. [2021-12-16 05:52:47,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 05:52:47,433 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 396 transitions. [2021-12-16 05:52:47,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-16 05:52:47,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:52:47,434 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:52:47,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 05:52:47,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-16 05:52:47,647 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-16 05:52:47,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:52:47,648 INFO L85 PathProgramCache]: Analyzing trace with hash 638442131, now seen corresponding path program 2 times [2021-12-16 05:52:47,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:52:47,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185797458] [2021-12-16 05:52:47,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:47,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:52:47,667 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:52:47,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439936022] [2021-12-16 05:52:47,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:52:47,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:52:47,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:52:47,669 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:52:47,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 05:52:47,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:52:47,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:52:47,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 106 conjunts are in the unsatisfiable core [2021-12-16 05:52:47,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:52:47,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-16 05:52:47,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:52:48,635 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:52:48,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-12-16 05:52:48,692 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-16 05:52:48,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-16 05:52:49,038 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:52:49,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-12-16 05:52:49,101 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-16 05:52:49,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-16 05:52:49,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:52:49,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-16 05:52:49,413 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-12-16 05:52:49,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2021-12-16 05:52:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 101 proven. 59 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-16 05:52:49,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:52:49,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:52:49,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185797458] [2021-12-16 05:52:49,685 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 05:52:49,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439936022] [2021-12-16 05:52:49,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439936022] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:52:49,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:52:49,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-12-16 05:52:49,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148320307] [2021-12-16 05:52:49,686 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-16 05:52:49,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 05:52:49,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:52:49,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 05:52:49,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-12-16 05:52:49,687 INFO L87 Difference]: Start difference. First operand 349 states and 396 transitions. Second operand has 23 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-16 05:52:51,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:52:51,103 INFO L93 Difference]: Finished difference Result 458 states and 527 transitions. [2021-12-16 05:52:51,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 05:52:51,103 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 89 [2021-12-16 05:52:51,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:52:51,105 INFO L225 Difference]: With dead ends: 458 [2021-12-16 05:52:51,105 INFO L226 Difference]: Without dead ends: 458 [2021-12-16 05:52:51,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-12-16 05:52:51,105 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 111 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 3175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1991 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:52:51,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 1052 Invalid, 3175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1170 Invalid, 0 Unknown, 1991 Unchecked, 1.1s Time] [2021-12-16 05:52:51,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-12-16 05:52:51,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 356. [2021-12-16 05:52:51,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 244 states have (on average 1.471311475409836) internal successors, (359), 326 states have internal predecessors, (359), 20 states have call successors, (20), 9 states have call predecessors, (20), 11 states have return successors, (25), 20 states have call predecessors, (25), 20 states have call successors, (25) [2021-12-16 05:52:51,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 404 transitions. [2021-12-16 05:52:51,115 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 404 transitions. Word has length 89 [2021-12-16 05:52:51,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:52:51,115 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 404 transitions. [2021-12-16 05:52:51,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-16 05:52:51,116 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 404 transitions. [2021-12-16 05:52:51,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-16 05:52:51,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:52:51,117 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:52:51,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-16 05:52:51,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:52:51,329 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-16 05:52:51,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:52:51,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1683130417, now seen corresponding path program 1 times [2021-12-16 05:52:51,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:52:51,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598235899] [2021-12-16 05:52:51,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:51,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:52:51,342 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:52:51,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648777990] [2021-12-16 05:52:51,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:51,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:52:51,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:52:51,350 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:52:51,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 05:52:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:52:51,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 05:52:51,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:52:51,612 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-16 05:52:51,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:52:51,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:52:51,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598235899] [2021-12-16 05:52:51,613 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 05:52:51,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648777990] [2021-12-16 05:52:51,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648777990] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:52:51,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:52:51,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:52:51,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584647295] [2021-12-16 05:52:51,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:52:51,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:52:51,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:52:51,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:52:51,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:52:51,614 INFO L87 Difference]: Start difference. First operand 356 states and 404 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 05:52:51,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:52:51,730 INFO L93 Difference]: Finished difference Result 369 states and 427 transitions. [2021-12-16 05:52:51,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:52:51,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 90 [2021-12-16 05:52:51,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:52:51,732 INFO L225 Difference]: With dead ends: 369 [2021-12-16 05:52:51,732 INFO L226 Difference]: Without dead ends: 369 [2021-12-16 05:52:51,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:52:51,733 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 167 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:52:51,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 537 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:52:51,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-12-16 05:52:51,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 355. [2021-12-16 05:52:51,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 244 states have (on average 1.4672131147540983) internal successors, (358), 325 states have internal predecessors, (358), 20 states have call successors, (20), 9 states have call predecessors, (20), 11 states have return successors, (25), 20 states have call predecessors, (25), 20 states have call successors, (25) [2021-12-16 05:52:51,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 403 transitions. [2021-12-16 05:52:51,739 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 403 transitions. Word has length 90 [2021-12-16 05:52:51,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:52:51,740 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 403 transitions. [2021-12-16 05:52:51,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 05:52:51,740 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 403 transitions. [2021-12-16 05:52:51,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-16 05:52:51,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:52:51,741 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:52:51,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-16 05:52:51,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-16 05:52:51,958 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-16 05:52:51,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:52:51,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1683130416, now seen corresponding path program 1 times [2021-12-16 05:52:51,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:52:51,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973120932] [2021-12-16 05:52:51,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:51,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:52:51,971 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:52:51,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [514408894] [2021-12-16 05:52:51,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:51,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:52:51,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:52:51,972 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:52:51,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 05:52:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:52:52,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-16 05:52:52,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:52:52,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:52:52,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-16 05:52:53,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:52:53,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-16 05:52:53,616 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-16 05:52:53,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-16 05:52:53,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:52:53,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-16 05:52:53,900 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:52:53,901 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 11 treesize of output 11 [2021-12-16 05:52:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 108 proven. 51 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-16 05:52:56,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:52:56,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:52:56,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973120932] [2021-12-16 05:52:56,288 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 05:52:56,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514408894] [2021-12-16 05:52:56,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514408894] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:52:56,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:52:56,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-12-16 05:52:56,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901255232] [2021-12-16 05:52:56,289 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-16 05:52:56,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 05:52:56,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:52:56,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 05:52:56,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-12-16 05:52:56,290 INFO L87 Difference]: Start difference. First operand 355 states and 403 transitions. Second operand has 21 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 05:52:57,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:52:57,443 INFO L93 Difference]: Finished difference Result 562 states and 661 transitions. [2021-12-16 05:52:57,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-16 05:52:57,443 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 90 [2021-12-16 05:52:57,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:52:57,445 INFO L225 Difference]: With dead ends: 562 [2021-12-16 05:52:57,445 INFO L226 Difference]: Without dead ends: 562 [2021-12-16 05:52:57,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-12-16 05:52:57,446 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 114 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 2262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2017 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:52:57,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 1091 Invalid, 2262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 232 Invalid, 0 Unknown, 2017 Unchecked, 0.2s Time] [2021-12-16 05:52:57,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-12-16 05:52:57,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 398. [2021-12-16 05:52:57,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 281 states have (on average 1.4270462633451957) internal successors, (401), 362 states have internal predecessors, (401), 24 states have call successors, (24), 9 states have call predecessors, (24), 13 states have return successors, (33), 26 states have call predecessors, (33), 24 states have call successors, (33) [2021-12-16 05:52:57,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 458 transitions. [2021-12-16 05:52:57,463 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 458 transitions. Word has length 90 [2021-12-16 05:52:57,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:52:57,463 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 458 transitions. [2021-12-16 05:52:57,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 05:52:57,463 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 458 transitions. [2021-12-16 05:52:57,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-16 05:52:57,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:52:57,464 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:52:57,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-16 05:52:57,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-16 05:52:57,683 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-16 05:52:57,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:52:57,683 INFO L85 PathProgramCache]: Analyzing trace with hash 644032399, now seen corresponding path program 2 times [2021-12-16 05:52:57,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:52:57,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619386504] [2021-12-16 05:52:57,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:52:57,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:52:57,695 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:52:57,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1710419486] [2021-12-16 05:52:57,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:52:57,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:52:57,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:52:57,697 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:52:57,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-16 05:52:57,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:52:57,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:52:57,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-16 05:52:58,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:52:58,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-16 05:52:58,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:53:12,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:53:12,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2021-12-16 05:53:12,272 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-16 05:53:12,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21