./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0235-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ff03de63 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-0235-1.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 6e8dd9d71aae7a8c83467a9093ad4bffb4ddd59cddc2d90362f34ff651f24f9a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 18:05:13,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 18:05:13,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 18:05:13,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 18:05:13,495 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 18:05:13,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 18:05:13,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 18:05:13,502 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 18:05:13,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 18:05:13,509 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 18:05:13,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 18:05:13,511 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 18:05:13,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 18:05:13,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 18:05:13,515 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 18:05:13,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 18:05:13,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 18:05:13,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 18:05:13,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 18:05:13,525 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 18:05:13,527 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 18:05:13,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 18:05:13,530 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 18:05:13,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 18:05:13,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 18:05:13,534 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 18:05:13,535 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 18:05:13,536 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 18:05:13,537 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 18:05:13,538 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 18:05:13,538 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 18:05:13,539 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 18:05:13,540 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 18:05:13,541 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 18:05:13,542 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 18:05:13,542 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 18:05:13,543 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 18:05:13,543 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 18:05:13,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 18:05:13,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 18:05:13,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 18:05:13,545 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-21 18:05:13,577 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 18:05:13,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 18:05:13,578 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 18:05:13,578 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 18:05:13,579 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 18:05:13,579 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 18:05:13,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 18:05:13,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 18:05:13,580 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 18:05:13,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 18:05:13,581 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 18:05:13,581 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 18:05:13,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 18:05:13,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 18:05:13,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 18:05:13,582 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 18:05:13,582 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 18:05:13,582 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 18:05:13,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 18:05:13,583 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 18:05:13,583 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 18:05:13,583 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 18:05:13,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 18:05:13,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 18:05:13,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 18:05:13,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:05:13,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 18:05:13,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 18:05:13,585 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 18:05:13,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 18:05:13,585 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 18:05:13,585 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e8dd9d71aae7a8c83467a9093ad4bffb4ddd59cddc2d90362f34ff651f24f9a [2021-12-21 18:05:13,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 18:05:13,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 18:05:13,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 18:05:13,831 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 18:05:13,835 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 18:05:13,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0235-1.i [2021-12-21 18:05:13,908 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/765f26d1f/bc7a304a357e4de4869729648f649d19/FLAG08c5fedbb [2021-12-21 18:05:14,346 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 18:05:14,346 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0235-1.i [2021-12-21 18:05:14,359 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/765f26d1f/bc7a304a357e4de4869729648f649d19/FLAG08c5fedbb [2021-12-21 18:05:14,690 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/765f26d1f/bc7a304a357e4de4869729648f649d19 [2021-12-21 18:05:14,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 18:05:14,693 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 18:05:14,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 18:05:14,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 18:05:14,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 18:05:14,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:05:14" (1/1) ... [2021-12-21 18:05:14,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ac8fa58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:14, skipping insertion in model container [2021-12-21 18:05:14,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:05:14" (1/1) ... [2021-12-21 18:05:14,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 18:05:14,754 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:05:15,061 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:05:15,071 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 18:05:15,132 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:05:15,170 INFO L208 MainTranslator]: Completed translation [2021-12-21 18:05:15,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:15 WrapperNode [2021-12-21 18:05:15,171 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 18:05:15,172 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 18:05:15,172 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 18:05:15,173 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 18:05:15,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:15" (1/1) ... [2021-12-21 18:05:15,197 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:15" (1/1) ... [2021-12-21 18:05:15,227 INFO L137 Inliner]: procedures = 188, calls = 69, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 234 [2021-12-21 18:05:15,227 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 18:05:15,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 18:05:15,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 18:05:15,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 18:05:15,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:15" (1/1) ... [2021-12-21 18:05:15,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:15" (1/1) ... [2021-12-21 18:05:15,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:15" (1/1) ... [2021-12-21 18:05:15,241 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:15" (1/1) ... [2021-12-21 18:05:15,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:15" (1/1) ... [2021-12-21 18:05:15,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:15" (1/1) ... [2021-12-21 18:05:15,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:15" (1/1) ... [2021-12-21 18:05:15,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 18:05:15,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 18:05:15,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 18:05:15,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 18:05:15,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:15" (1/1) ... [2021-12-21 18:05:15,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:05:15,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:15,303 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) [2021-12-21 18:05:15,305 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 [2021-12-21 18:05:15,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 18:05:15,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 18:05:15,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 18:05:15,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 18:05:15,329 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2021-12-21 18:05:15,329 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2021-12-21 18:05:15,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 18:05:15,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 18:05:15,329 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2021-12-21 18:05:15,330 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2021-12-21 18:05:15,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 18:05:15,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 18:05:15,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 18:05:15,461 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 18:05:15,462 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 18:05:15,924 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 18:05:15,932 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 18:05:15,933 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-12-21 18:05:15,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:05:15 BoogieIcfgContainer [2021-12-21 18:05:15,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 18:05:15,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 18:05:15,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 18:05:15,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 18:05:15,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 06:05:14" (1/3) ... [2021-12-21 18:05:15,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d21278d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:05:15, skipping insertion in model container [2021-12-21 18:05:15,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:15" (2/3) ... [2021-12-21 18:05:15,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d21278d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:05:15, skipping insertion in model container [2021-12-21 18:05:15,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:05:15" (3/3) ... [2021-12-21 18:05:15,942 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0235-1.i [2021-12-21 18:05:15,946 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 18:05:15,946 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 85 error locations. [2021-12-21 18:05:15,977 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 18:05:15,983 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 [2021-12-21 18:05:15,983 INFO L340 AbstractCegarLoop]: Starting to check reachability of 85 error locations. [2021-12-21 18:05:15,997 INFO L276 IsEmpty]: Start isEmpty. Operand has 233 states, 134 states have (on average 1.873134328358209) internal successors, (251), 219 states have internal predecessors, (251), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-21 18:05:16,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-21 18:05:16,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:16,003 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-21 18:05:16,004 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-12-21 18:05:16,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:16,008 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2021-12-21 18:05:16,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:16,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635168866] [2021-12-21 18:05:16,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:16,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:16,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:16,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635168866] [2021-12-21 18:05:16,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635168866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:16,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:16,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:05:16,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745651114] [2021-12-21 18:05:16,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:16,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 18:05:16,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:16,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 18:05:16,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 18:05:16,159 INFO L87 Difference]: Start difference. First operand has 233 states, 134 states have (on average 1.873134328358209) internal successors, (251), 219 states have internal predecessors, (251), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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) [2021-12-21 18:05:16,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:16,193 INFO L93 Difference]: Finished difference Result 233 states and 262 transitions. [2021-12-21 18:05:16,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 18:05:16,195 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 [2021-12-21 18:05:16,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:16,203 INFO L225 Difference]: With dead ends: 233 [2021-12-21 18:05:16,203 INFO L226 Difference]: Without dead ends: 231 [2021-12-21 18:05:16,205 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 [2021-12-21 18:05:16,207 INFO L933 BasicCegarLoop]: 262 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, 262 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 [2021-12-21 18:05:16,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:05:16,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-21 18:05:16,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2021-12-21 18:05:16,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 133 states have (on average 1.7894736842105263) internal successors, (238), 217 states have internal predecessors, (238), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-21 18:05:16,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 260 transitions. [2021-12-21 18:05:16,269 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 260 transitions. Word has length 4 [2021-12-21 18:05:16,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:16,269 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 260 transitions. [2021-12-21 18:05:16,270 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) [2021-12-21 18:05:16,270 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 260 transitions. [2021-12-21 18:05:16,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 18:05:16,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:16,270 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 18:05:16,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 18:05:16,271 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-12-21 18:05:16,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:16,272 INFO L85 PathProgramCache]: Analyzing trace with hash 889932981, now seen corresponding path program 1 times [2021-12-21 18:05:16,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:16,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130751297] [2021-12-21 18:05:16,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:16,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:16,285 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:16,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1385537005] [2021-12-21 18:05:16,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:16,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:16,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:16,292 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) [2021-12-21 18:05:16,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 18:05:16,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:16,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 18:05:16,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:16,469 INFO L387 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 [2021-12-21 18:05:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:16,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:05:16,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:16,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130751297] [2021-12-21 18:05:16,479 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:16,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385537005] [2021-12-21 18:05:16,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385537005] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:16,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:16,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:05:16,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837083243] [2021-12-21 18:05:16,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:16,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:05:16,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:16,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:05:16,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:05:16,482 INFO L87 Difference]: Start difference. First operand 231 states and 260 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) [2021-12-21 18:05:16,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:16,651 INFO L93 Difference]: Finished difference Result 230 states and 259 transitions. [2021-12-21 18:05:16,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:05:16,652 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 [2021-12-21 18:05:16,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:16,658 INFO L225 Difference]: With dead ends: 230 [2021-12-21 18:05:16,658 INFO L226 Difference]: Without dead ends: 230 [2021-12-21 18:05:16,658 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 [2021-12-21 18:05:16,660 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 9 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:16,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 418 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:05:16,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-12-21 18:05:16,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2021-12-21 18:05:16,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 133 states have (on average 1.781954887218045) internal successors, (237), 216 states have internal predecessors, (237), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-21 18:05:16,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 259 transitions. [2021-12-21 18:05:16,679 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 259 transitions. Word has length 6 [2021-12-21 18:05:16,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:16,683 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 259 transitions. [2021-12-21 18:05:16,684 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) [2021-12-21 18:05:16,684 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 259 transitions. [2021-12-21 18:05:16,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 18:05:16,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:16,684 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:16,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:16,907 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 [2021-12-21 18:05:16,908 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-12-21 18:05:16,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:16,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1818119056, now seen corresponding path program 1 times [2021-12-21 18:05:16,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:16,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408433268] [2021-12-21 18:05:16,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:16,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:16,919 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:16,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141113401] [2021-12-21 18:05:16,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:16,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:16,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:16,926 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) [2021-12-21 18:05:16,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 18:05:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:16,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 18:05:16,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:17,071 INFO L387 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 [2021-12-21 18:05:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:17,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:05:17,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:17,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408433268] [2021-12-21 18:05:17,119 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:17,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141113401] [2021-12-21 18:05:17,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141113401] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:17,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:17,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:05:17,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256206386] [2021-12-21 18:05:17,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:17,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:05:17,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:17,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:05:17,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:05:17,122 INFO L87 Difference]: Start difference. First operand 230 states and 259 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) [2021-12-21 18:05:17,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:17,128 INFO L93 Difference]: Finished difference Result 229 states and 258 transitions. [2021-12-21 18:05:17,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:05:17,128 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 [2021-12-21 18:05:17,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:17,130 INFO L225 Difference]: With dead ends: 229 [2021-12-21 18:05:17,130 INFO L226 Difference]: Without dead ends: 229 [2021-12-21 18:05:17,130 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 [2021-12-21 18:05:17,131 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 0 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:17,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 443 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 70 Unchecked, 0.0s Time] [2021-12-21 18:05:17,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-12-21 18:05:17,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2021-12-21 18:05:17,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 133 states have (on average 1.7744360902255638) internal successors, (236), 215 states have internal predecessors, (236), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-21 18:05:17,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 258 transitions. [2021-12-21 18:05:17,150 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 258 transitions. Word has length 7 [2021-12-21 18:05:17,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:17,150 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 258 transitions. [2021-12-21 18:05:17,151 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) [2021-12-21 18:05:17,151 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 258 transitions. [2021-12-21 18:05:17,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 18:05:17,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:17,154 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] [2021-12-21 18:05:17,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-21 18:05:17,369 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 [2021-12-21 18:05:17,369 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-12-21 18:05:17,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:17,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1115615018, now seen corresponding path program 1 times [2021-12-21 18:05:17,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:17,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293375841] [2021-12-21 18:05:17,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:17,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:17,394 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:17,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3682442] [2021-12-21 18:05:17,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:17,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:17,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:17,397 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) [2021-12-21 18:05:17,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 18:05:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:17,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 18:05:17,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:17,868 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:05:17,869 INFO L387 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 [2021-12-21 18:05:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-21 18:05:17,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:18,142 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-21 18:05:18,142 INFO L387 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 [2021-12-21 18:05:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-21 18:05:18,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:18,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293375841] [2021-12-21 18:05:18,225 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:18,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3682442] [2021-12-21 18:05:18,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3682442] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:05:18,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:05:18,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-12-21 18:05:18,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905960700] [2021-12-21 18:05:18,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:18,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 18:05:18,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:18,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 18:05:18,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-21 18:05:18,228 INFO L87 Difference]: Start difference. First operand 229 states and 258 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) [2021-12-21 18:05:18,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:18,742 INFO L93 Difference]: Finished difference Result 364 states and 423 transitions. [2021-12-21 18:05:18,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 18:05:18,742 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 [2021-12-21 18:05:18,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:18,745 INFO L225 Difference]: With dead ends: 364 [2021-12-21 18:05:18,745 INFO L226 Difference]: Without dead ends: 364 [2021-12-21 18:05:18,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-12-21 18:05:18,747 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 215 mSDsluCounter, 1736 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1921 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 301 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:18,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 1921 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 843 Invalid, 0 Unknown, 301 Unchecked, 0.4s Time] [2021-12-21 18:05:18,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-12-21 18:05:18,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 227. [2021-12-21 18:05:18,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 133 states have (on average 1.7593984962406015) internal successors, (234), 213 states have internal predecessors, (234), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-21 18:05:18,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 256 transitions. [2021-12-21 18:05:18,771 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 256 transitions. Word has length 73 [2021-12-21 18:05:18,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:18,772 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 256 transitions. [2021-12-21 18:05:18,772 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) [2021-12-21 18:05:18,772 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 256 transitions. [2021-12-21 18:05:18,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 18:05:18,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:18,774 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] [2021-12-21 18:05:18,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:18,987 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 [2021-12-21 18:05:18,987 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-12-21 18:05:18,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:18,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1115615019, now seen corresponding path program 1 times [2021-12-21 18:05:18,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:18,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748469753] [2021-12-21 18:05:18,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:18,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:19,011 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:19,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1005973653] [2021-12-21 18:05:19,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:19,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:19,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:19,013 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) [2021-12-21 18:05:19,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 18:05:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:19,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-21 18:05:19,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:19,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:19,992 INFO L387 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 [2021-12-21 18:05:20,003 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:05:20,004 INFO L387 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 [2021-12-21 18:05:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-21 18:05:20,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:20,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:20,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748469753] [2021-12-21 18:05:20,152 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:20,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005973653] [2021-12-21 18:05:20,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005973653] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:20,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:05:20,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-12-21 18:05:20,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154029807] [2021-12-21 18:05:20,152 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:20,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 18:05:20,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:20,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 18:05:20,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-12-21 18:05:20,154 INFO L87 Difference]: Start difference. First operand 227 states and 256 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) [2021-12-21 18:05:20,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:20,557 INFO L93 Difference]: Finished difference Result 337 states and 393 transitions. [2021-12-21 18:05:20,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 18:05:20,557 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 [2021-12-21 18:05:20,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:20,559 INFO L225 Difference]: With dead ends: 337 [2021-12-21 18:05:20,559 INFO L226 Difference]: Without dead ends: 337 [2021-12-21 18:05:20,559 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 [2021-12-21 18:05:20,560 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 110 mSDsluCounter, 1352 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1550 SdHoareTripleChecker+Invalid, 2352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:20,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1550 Invalid, 2352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 230 Invalid, 0 Unknown, 2111 Unchecked, 0.2s Time] [2021-12-21 18:05:20,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-12-21 18:05:20,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 236. [2021-12-21 18:05:20,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 140 states have (on average 1.7285714285714286) internal successors, (242), 220 states have internal predecessors, (242), 12 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (19), 13 states have call predecessors, (19), 12 states have call successors, (19) [2021-12-21 18:05:20,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 273 transitions. [2021-12-21 18:05:20,585 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 273 transitions. Word has length 73 [2021-12-21 18:05:20,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:20,586 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 273 transitions. [2021-12-21 18:05:20,586 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) [2021-12-21 18:05:20,586 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 273 transitions. [2021-12-21 18:05:20,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-21 18:05:20,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:20,588 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] [2021-12-21 18:05:20,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:20,805 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 [2021-12-21 18:05:20,805 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-12-21 18:05:20,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:20,806 INFO L85 PathProgramCache]: Analyzing trace with hash -739950276, now seen corresponding path program 1 times [2021-12-21 18:05:20,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:20,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844713724] [2021-12-21 18:05:20,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:20,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:20,824 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:20,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884883718] [2021-12-21 18:05:20,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:20,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:20,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:20,828 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) [2021-12-21 18:05:20,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 18:05:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:20,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-21 18:05:21,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:21,084 INFO L387 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 [2021-12-21 18:05:21,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:21,578 INFO L387 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 [2021-12-21 18:05:21,588 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:05:21,588 INFO L387 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 [2021-12-21 18:05:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 9 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-21 18:05:21,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:21,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:21,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844713724] [2021-12-21 18:05:21,712 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:21,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884883718] [2021-12-21 18:05:21,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884883718] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:21,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:05:21,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-21 18:05:21,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974580799] [2021-12-21 18:05:21,712 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:21,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 18:05:21,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:21,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 18:05:21,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-21 18:05:21,713 INFO L87 Difference]: Start difference. First operand 236 states and 273 transitions. Second operand has 12 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 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) [2021-12-21 18:05:22,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:22,952 INFO L93 Difference]: Finished difference Result 336 states and 392 transitions. [2021-12-21 18:05:22,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 18:05:22,953 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 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 74 [2021-12-21 18:05:22,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:22,954 INFO L225 Difference]: With dead ends: 336 [2021-12-21 18:05:22,955 INFO L226 Difference]: Without dead ends: 336 [2021-12-21 18:05:22,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-12-21 18:05:22,955 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 111 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 550 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:22,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 697 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1165 Invalid, 0 Unknown, 550 Unchecked, 1.1s Time] [2021-12-21 18:05:22,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-12-21 18:05:22,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 226. [2021-12-21 18:05:22,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 133 states have (on average 1.7518796992481203) internal successors, (233), 212 states have internal predecessors, (233), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-21 18:05:22,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 255 transitions. [2021-12-21 18:05:22,963 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 255 transitions. Word has length 74 [2021-12-21 18:05:22,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:22,964 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 255 transitions. [2021-12-21 18:05:22,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 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) [2021-12-21 18:05:22,964 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 255 transitions. [2021-12-21 18:05:22,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-21 18:05:22,965 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:22,965 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, 1] [2021-12-21 18:05:22,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-21 18:05:23,179 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 [2021-12-21 18:05:23,179 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-12-21 18:05:23,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:23,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1635791477, now seen corresponding path program 1 times [2021-12-21 18:05:23,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:23,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55653378] [2021-12-21 18:05:23,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:23,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:23,201 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:23,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063495659] [2021-12-21 18:05:23,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:23,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:23,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:23,204 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) [2021-12-21 18:05:23,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 18:05:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:23,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-21 18:05:23,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:23,554 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:05:23,555 INFO L387 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 [2021-12-21 18:05:23,663 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:05:23,663 INFO L387 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 [2021-12-21 18:05:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 18:05:23,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:23,995 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-21 18:05:23,995 INFO L387 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 [2021-12-21 18:05:24,046 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 18:05:24,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:24,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55653378] [2021-12-21 18:05:24,046 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:24,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063495659] [2021-12-21 18:05:24,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063495659] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:05:24,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:05:24,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2021-12-21 18:05:24,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272584178] [2021-12-21 18:05:24,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:24,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 18:05:24,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:24,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 18:05:24,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-12-21 18:05:24,049 INFO L87 Difference]: Start difference. First operand 226 states and 255 transitions. Second operand has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 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) [2021-12-21 18:05:24,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:24,575 INFO L93 Difference]: Finished difference Result 369 states and 430 transitions. [2021-12-21 18:05:24,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 18:05:24,575 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 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 75 [2021-12-21 18:05:24,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:24,577 INFO L225 Difference]: With dead ends: 369 [2021-12-21 18:05:24,577 INFO L226 Difference]: Without dead ends: 369 [2021-12-21 18:05:24,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 131 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-12-21 18:05:24,578 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 289 mSDsluCounter, 1625 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 1804 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:24,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 1804 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 912 Invalid, 0 Unknown, 368 Unchecked, 0.4s Time] [2021-12-21 18:05:24,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-12-21 18:05:24,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 232. [2021-12-21 18:05:24,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 138 states have (on average 1.7246376811594204) internal successors, (238), 216 states have internal predecessors, (238), 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) [2021-12-21 18:05:24,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 264 transitions. [2021-12-21 18:05:24,586 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 264 transitions. Word has length 75 [2021-12-21 18:05:24,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:24,587 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 264 transitions. [2021-12-21 18:05:24,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 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) [2021-12-21 18:05:24,587 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 264 transitions. [2021-12-21 18:05:24,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-21 18:05:24,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:24,588 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, 1] [2021-12-21 18:05:24,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:24,815 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 [2021-12-21 18:05:24,815 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-12-21 18:05:24,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:24,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1635791476, now seen corresponding path program 1 times [2021-12-21 18:05:24,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:24,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651107788] [2021-12-21 18:05:24,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:24,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:24,835 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:24,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [613883007] [2021-12-21 18:05:24,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:24,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:24,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:24,837 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) [2021-12-21 18:05:24,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 18:05:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:24,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-21 18:05:24,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:25,053 INFO L387 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 [2021-12-21 18:05:25,701 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:05:25,701 INFO L387 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 [2021-12-21 18:05:25,706 INFO L387 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 [2021-12-21 18:05:25,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:25,897 INFO L387 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 [2021-12-21 18:05:25,915 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-21 18:05:25,915 INFO L387 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 [2021-12-21 18:05:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 18:05:25,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:26,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:26,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651107788] [2021-12-21 18:05:26,093 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:26,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613883007] [2021-12-21 18:05:26,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613883007] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:26,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:05:26,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-12-21 18:05:26,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481169638] [2021-12-21 18:05:26,093 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:26,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 18:05:26,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:26,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 18:05:26,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-12-21 18:05:26,094 INFO L87 Difference]: Start difference. First operand 232 states and 264 transitions. Second operand has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 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) [2021-12-21 18:05:27,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:27,337 INFO L93 Difference]: Finished difference Result 333 states and 383 transitions. [2021-12-21 18:05:27,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 18:05:27,338 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 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 75 [2021-12-21 18:05:27,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:27,339 INFO L225 Difference]: With dead ends: 333 [2021-12-21 18:05:27,339 INFO L226 Difference]: Without dead ends: 333 [2021-12-21 18:05:27,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-12-21 18:05:27,340 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 113 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 2479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1318 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:27,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 1257 Invalid, 2479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1149 Invalid, 0 Unknown, 1318 Unchecked, 1.0s Time] [2021-12-21 18:05:27,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-12-21 18:05:27,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 232. [2021-12-21 18:05:27,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 138 states have (on average 1.7173913043478262) internal successors, (237), 216 states have internal predecessors, (237), 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) [2021-12-21 18:05:27,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 263 transitions. [2021-12-21 18:05:27,347 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 263 transitions. Word has length 75 [2021-12-21 18:05:27,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:27,347 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 263 transitions. [2021-12-21 18:05:27,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 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) [2021-12-21 18:05:27,348 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 263 transitions. [2021-12-21 18:05:27,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-21 18:05:27,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:27,349 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, 1, 1] [2021-12-21 18:05:27,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:27,567 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 [2021-12-21 18:05:27,567 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-12-21 18:05:27,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:27,568 INFO L85 PathProgramCache]: Analyzing trace with hash 830071777, now seen corresponding path program 1 times [2021-12-21 18:05:27,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:27,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572699924] [2021-12-21 18:05:27,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:27,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:27,585 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:27,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945206077] [2021-12-21 18:05:27,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:27,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:27,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:27,589 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) [2021-12-21 18:05:27,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 18:05:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:27,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 18:05:27,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:27,884 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-21 18:05:27,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:27,914 INFO L387 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 8 treesize of output 6 [2021-12-21 18:05:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-21 18:05:28,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:28,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572699924] [2021-12-21 18:05:28,039 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:28,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945206077] [2021-12-21 18:05:28,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945206077] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:05:28,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:05:28,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-21 18:05:28,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916792182] [2021-12-21 18:05:28,039 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:28,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 18:05:28,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:28,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 18:05:28,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:05:28,040 INFO L87 Difference]: Start difference. First operand 232 states and 263 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 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) [2021-12-21 18:05:28,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:28,249 INFO L93 Difference]: Finished difference Result 250 states and 288 transitions. [2021-12-21 18:05:28,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 18:05:28,250 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 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 76 [2021-12-21 18:05:28,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:28,251 INFO L225 Difference]: With dead ends: 250 [2021-12-21 18:05:28,251 INFO L226 Difference]: Without dead ends: 250 [2021-12-21 18:05:28,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-21 18:05:28,252 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 305 mSDsluCounter, 1281 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 1508 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:28,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 1508 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:05:28,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-21 18:05:28,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 231. [2021-12-21 18:05:28,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 138 states have (on average 1.710144927536232) internal successors, (236), 215 states have internal predecessors, (236), 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) [2021-12-21 18:05:28,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 262 transitions. [2021-12-21 18:05:28,258 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 262 transitions. Word has length 76 [2021-12-21 18:05:28,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:28,258 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 262 transitions. [2021-12-21 18:05:28,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 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) [2021-12-21 18:05:28,258 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 262 transitions. [2021-12-21 18:05:28,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-21 18:05:28,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:28,266 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, 1, 1, 1, 1] [2021-12-21 18:05:28,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:28,466 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 [2021-12-21 18:05:28,466 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-12-21 18:05:28,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:28,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1164939870, now seen corresponding path program 1 times [2021-12-21 18:05:28,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:28,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849182109] [2021-12-21 18:05:28,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:28,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:28,488 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:28,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361167687] [2021-12-21 18:05:28,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:28,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:28,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:28,492 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) [2021-12-21 18:05:28,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 18:05:28,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:28,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 18:05:28,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:28,729 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-21 18:05:28,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:05:28,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:28,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849182109] [2021-12-21 18:05:28,729 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:28,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361167687] [2021-12-21 18:05:28,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361167687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:28,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:28,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:05:28,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414768328] [2021-12-21 18:05:28,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:28,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:05:28,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:28,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:05:28,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:05:28,731 INFO L87 Difference]: Start difference. First operand 231 states and 262 transitions. Second operand has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-12-21 18:05:28,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:28,829 INFO L93 Difference]: Finished difference Result 238 states and 273 transitions. [2021-12-21 18:05:28,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:05:28,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 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 78 [2021-12-21 18:05:28,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:28,830 INFO L225 Difference]: With dead ends: 238 [2021-12-21 18:05:28,830 INFO L226 Difference]: Without dead ends: 238 [2021-12-21 18:05:28,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:05:28,831 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 90 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:28,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 353 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:05:28,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-21 18:05:28,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 230. [2021-12-21 18:05:28,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 138 states have (on average 1.7028985507246377) internal successors, (235), 214 states have internal predecessors, (235), 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) [2021-12-21 18:05:28,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 261 transitions. [2021-12-21 18:05:28,845 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 261 transitions. Word has length 78 [2021-12-21 18:05:28,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:28,845 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 261 transitions. [2021-12-21 18:05:28,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-12-21 18:05:28,845 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 261 transitions. [2021-12-21 18:05:28,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-21 18:05:28,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:28,846 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:28,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:29,066 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 [2021-12-21 18:05:29,066 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-12-21 18:05:29,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:29,067 INFO L85 PathProgramCache]: Analyzing trace with hash -76043767, now seen corresponding path program 1 times [2021-12-21 18:05:29,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:29,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057344622] [2021-12-21 18:05:29,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:29,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:29,083 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:29,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571713643] [2021-12-21 18:05:29,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:29,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:29,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:29,085 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) [2021-12-21 18:05:29,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 18:05:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:29,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-21 18:05:29,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:29,408 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:05:29,408 INFO L387 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 [2021-12-21 18:05:29,499 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:05:29,499 INFO L387 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 [2021-12-21 18:05:29,610 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:05:29,610 INFO L387 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 [2021-12-21 18:05:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 18:05:29,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:29,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:29,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057344622] [2021-12-21 18:05:29,853 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:29,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571713643] [2021-12-21 18:05:29,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571713643] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:29,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:05:29,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-12-21 18:05:29,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704369643] [2021-12-21 18:05:29,854 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:29,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 18:05:29,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:29,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 18:05:29,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-21 18:05:29,856 INFO L87 Difference]: Start difference. First operand 230 states and 261 transitions. Second operand has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 18:05:30,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:30,407 INFO L93 Difference]: Finished difference Result 399 states and 465 transitions. [2021-12-21 18:05:30,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 18:05:30,407 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 82 [2021-12-21 18:05:30,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:30,409 INFO L225 Difference]: With dead ends: 399 [2021-12-21 18:05:30,409 INFO L226 Difference]: Without dead ends: 399 [2021-12-21 18:05:30,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-12-21 18:05:30,410 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 263 mSDsluCounter, 1874 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 2065 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:30,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 2065 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 964 Invalid, 0 Unknown, 480 Unchecked, 0.4s Time] [2021-12-21 18:05:30,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-12-21 18:05:30,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 262. [2021-12-21 18:05:30,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 165 states have (on average 1.612121212121212) internal successors, (266), 240 states have internal predecessors, (266), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-21 18:05:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 302 transitions. [2021-12-21 18:05:30,420 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 302 transitions. Word has length 82 [2021-12-21 18:05:30,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:30,420 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 302 transitions. [2021-12-21 18:05:30,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 18:05:30,420 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 302 transitions. [2021-12-21 18:05:30,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-21 18:05:30,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:30,421 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:30,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:30,645 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 [2021-12-21 18:05:30,645 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-12-21 18:05:30,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:30,646 INFO L85 PathProgramCache]: Analyzing trace with hash -76043766, now seen corresponding path program 1 times [2021-12-21 18:05:30,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:30,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039078492] [2021-12-21 18:05:30,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:30,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:30,668 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:30,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478571327] [2021-12-21 18:05:30,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:30,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:30,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:30,670 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) [2021-12-21 18:05:30,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 18:05:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:30,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-21 18:05:30,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:30,887 INFO L387 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 [2021-12-21 18:05:31,536 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:05:31,536 INFO L387 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 [2021-12-21 18:05:31,543 INFO L387 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 [2021-12-21 18:05:31,917 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:05:31,917 INFO L387 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 [2021-12-21 18:05:31,926 INFO L387 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 [2021-12-21 18:05:32,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:32,133 INFO L387 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 [2021-12-21 18:05:32,157 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-21 18:05:32,157 INFO L387 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 [2021-12-21 18:05:32,299 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 48 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 18:05:32,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:32,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:32,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039078492] [2021-12-21 18:05:32,458 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:32,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478571327] [2021-12-21 18:05:32,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478571327] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:32,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:05:32,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-12-21 18:05:32,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424871056] [2021-12-21 18:05:32,458 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:32,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-21 18:05:32,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:32,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-21 18:05:32,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-12-21 18:05:32,459 INFO L87 Difference]: Start difference. First operand 262 states and 302 transitions. Second operand has 22 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-21 18:05:33,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:33,980 INFO L93 Difference]: Finished difference Result 371 states and 431 transitions. [2021-12-21 18:05:33,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 18:05:33,980 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 82 [2021-12-21 18:05:33,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:33,982 INFO L225 Difference]: With dead ends: 371 [2021-12-21 18:05:33,982 INFO L226 Difference]: Without dead ends: 371 [2021-12-21 18:05:33,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-12-21 18:05:33,983 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 116 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 3920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2784 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:33,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 1442 Invalid, 3920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1124 Invalid, 0 Unknown, 2784 Unchecked, 1.0s Time] [2021-12-21 18:05:33,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-12-21 18:05:33,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 269. [2021-12-21 18:05:33,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 172 states have (on average 1.5930232558139534) internal successors, (274), 247 states have internal predecessors, (274), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-21 18:05:33,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 310 transitions. [2021-12-21 18:05:33,991 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 310 transitions. Word has length 82 [2021-12-21 18:05:33,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:33,991 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 310 transitions. [2021-12-21 18:05:33,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-21 18:05:33,992 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 310 transitions. [2021-12-21 18:05:33,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-21 18:05:33,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:33,992 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:34,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:34,207 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 [2021-12-21 18:05:34,207 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-12-21 18:05:34,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:34,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1937610552, now seen corresponding path program 1 times [2021-12-21 18:05:34,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:34,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309239592] [2021-12-21 18:05:34,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:34,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:34,220 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:34,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141664946] [2021-12-21 18:05:34,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:34,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:34,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:34,224 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) [2021-12-21 18:05:34,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 18:05:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:34,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 18:05:34,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-21 18:05:34,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:05:34,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:34,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309239592] [2021-12-21 18:05:34,465 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:34,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141664946] [2021-12-21 18:05:34,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141664946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:34,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:34,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:05:34,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740581482] [2021-12-21 18:05:34,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:34,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:05:34,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:34,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:05:34,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:05:34,468 INFO L87 Difference]: Start difference. First operand 269 states and 310 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 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) [2021-12-21 18:05:34,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:34,579 INFO L93 Difference]: Finished difference Result 282 states and 328 transitions. [2021-12-21 18:05:34,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:05:34,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 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 83 [2021-12-21 18:05:34,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:34,581 INFO L225 Difference]: With dead ends: 282 [2021-12-21 18:05:34,581 INFO L226 Difference]: Without dead ends: 282 [2021-12-21 18:05:34,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:05:34,582 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 157 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:34,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 517 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:05:34,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-12-21 18:05:34,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 268. [2021-12-21 18:05:34,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 172 states have (on average 1.5872093023255813) internal successors, (273), 246 states have internal predecessors, (273), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-21 18:05:34,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 309 transitions. [2021-12-21 18:05:34,593 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 309 transitions. Word has length 83 [2021-12-21 18:05:34,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:34,594 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 309 transitions. [2021-12-21 18:05:34,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 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) [2021-12-21 18:05:34,595 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 309 transitions. [2021-12-21 18:05:34,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-21 18:05:34,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:34,595 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:34,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:34,811 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 [2021-12-21 18:05:34,811 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-12-21 18:05:34,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:34,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1937610553, now seen corresponding path program 1 times [2021-12-21 18:05:34,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:34,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546022716] [2021-12-21 18:05:34,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:34,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:34,829 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:34,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607099082] [2021-12-21 18:05:34,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:34,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:34,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:34,835 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) [2021-12-21 18:05:34,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 18:05:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:35,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-21 18:05:35,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:35,079 INFO L387 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 [2021-12-21 18:05:35,093 INFO L387 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 [2021-12-21 18:05:37,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:37,694 INFO L387 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 [2021-12-21 18:05:37,713 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:05:37,714 INFO L387 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 [2021-12-21 18:05:38,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:38,399 INFO L387 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 20 treesize of output 22 [2021-12-21 18:05:38,415 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-21 18:05:38,415 INFO L387 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 [2021-12-21 18:05:40,043 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 18:05:40,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:40,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:40,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546022716] [2021-12-21 18:05:40,335 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:40,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607099082] [2021-12-21 18:05:40,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607099082] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:40,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:05:40,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-12-21 18:05:40,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355902870] [2021-12-21 18:05:40,336 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:40,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-21 18:05:40,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:40,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-21 18:05:40,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-12-21 18:05:40,337 INFO L87 Difference]: Start difference. First operand 268 states and 309 transitions. Second operand has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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) [2021-12-21 18:05:40,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:40,820 INFO L93 Difference]: Finished difference Result 415 states and 499 transitions. [2021-12-21 18:05:40,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 18:05:40,820 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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 83 [2021-12-21 18:05:40,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:40,822 INFO L225 Difference]: With dead ends: 415 [2021-12-21 18:05:40,822 INFO L226 Difference]: Without dead ends: 415 [2021-12-21 18:05:40,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-12-21 18:05:40,823 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 114 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 2810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2581 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:40,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 1780 Invalid, 2810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 218 Invalid, 0 Unknown, 2581 Unchecked, 0.2s Time] [2021-12-21 18:05:40,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-12-21 18:05:40,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 311. [2021-12-21 18:05:40,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 209 states have (on average 1.5119617224880382) internal successors, (316), 283 states have internal predecessors, (316), 22 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (39), 24 states have call predecessors, (39), 22 states have call successors, (39) [2021-12-21 18:05:40,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 377 transitions. [2021-12-21 18:05:40,833 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 377 transitions. Word has length 83 [2021-12-21 18:05:40,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:40,833 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 377 transitions. [2021-12-21 18:05:40,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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) [2021-12-21 18:05:40,833 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 377 transitions. [2021-12-21 18:05:40,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-21 18:05:40,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:40,834 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:40,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:41,059 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 [2021-12-21 18:05:41,059 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-12-21 18:05:41,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:41,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1702611176, now seen corresponding path program 1 times [2021-12-21 18:05:41,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:41,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165322367] [2021-12-21 18:05:41,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:41,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:41,082 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:41,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757309646] [2021-12-21 18:05:41,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:41,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:41,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:41,084 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) [2021-12-21 18:05:41,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 18:05:41,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:41,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-21 18:05:41,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:41,304 INFO L387 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 [2021-12-21 18:05:41,315 INFO L387 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 [2021-12-21 18:05:42,679 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:05:42,680 INFO L387 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 [2021-12-21 18:05:42,692 INFO L387 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 [2021-12-21 18:05:43,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:43,115 INFO L387 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 20 treesize of output 22 [2021-12-21 18:05:43,130 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-21 18:05:43,130 INFO L387 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 [2021-12-21 18:05:44,308 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 27 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 18:05:44,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:44,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:44,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165322367] [2021-12-21 18:05:44,647 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:44,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757309646] [2021-12-21 18:05:44,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757309646] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:44,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:05:44,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-12-21 18:05:44,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032090733] [2021-12-21 18:05:44,648 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:44,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-21 18:05:44,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:44,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-21 18:05:44,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-12-21 18:05:44,650 INFO L87 Difference]: Start difference. First operand 311 states and 377 transitions. Second operand has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 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) [2021-12-21 18:05:45,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:45,079 INFO L93 Difference]: Finished difference Result 517 states and 654 transitions. [2021-12-21 18:05:45,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 18:05:45,079 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 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 84 [2021-12-21 18:05:45,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:45,081 INFO L225 Difference]: With dead ends: 517 [2021-12-21 18:05:45,081 INFO L226 Difference]: Without dead ends: 517 [2021-12-21 18:05:45,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-12-21 18:05:45,082 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 170 mSDsluCounter, 2751 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 3012 SdHoareTripleChecker+Invalid, 5428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5192 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:45,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 3012 Invalid, 5428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 225 Invalid, 0 Unknown, 5192 Unchecked, 0.2s Time] [2021-12-21 18:05:45,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-12-21 18:05:45,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 318. [2021-12-21 18:05:45,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 215 states have (on average 1.5069767441860464) internal successors, (324), 290 states have internal predecessors, (324), 22 states have call successors, (22), 3 states have call predecessors, (22), 6 states have return successors, (55), 24 states have call predecessors, (55), 22 states have call successors, (55) [2021-12-21 18:05:45,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 401 transitions. [2021-12-21 18:05:45,095 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 401 transitions. Word has length 84 [2021-12-21 18:05:45,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:45,095 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 401 transitions. [2021-12-21 18:05:45,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 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) [2021-12-21 18:05:45,095 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 401 transitions. [2021-12-21 18:05:45,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-21 18:05:45,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:45,096 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:45,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-21 18:05:45,311 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 [2021-12-21 18:05:45,311 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-12-21 18:05:45,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:45,312 INFO L85 PathProgramCache]: Analyzing trace with hash 567625738, now seen corresponding path program 2 times [2021-12-21 18:05:45,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:45,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187337762] [2021-12-21 18:05:45,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:45,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:45,322 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:45,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [975511249] [2021-12-21 18:05:45,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:05:45,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:45,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:45,324 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) [2021-12-21 18:05:45,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-21 18:05:45,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:05:45,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:05:45,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-21 18:05:45,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:45,550 INFO L387 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 [2021-12-21 18:05:45,564 INFO L387 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 [2021-12-21 18:05:48,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:48,143 INFO L387 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 [2021-12-21 18:05:48,167 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:05:48,167 INFO L387 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 [2021-12-21 18:05:49,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:49,099 INFO L387 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 [2021-12-21 18:05:49,109 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:05:49,109 INFO L387 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 [2021-12-21 18:05:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 27 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 18:05:50,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:51,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:51,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187337762] [2021-12-21 18:05:51,193 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:51,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975511249] [2021-12-21 18:05:51,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975511249] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:51,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:05:51,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-12-21 18:05:51,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694890058] [2021-12-21 18:05:51,194 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:51,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 18:05:51,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:51,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 18:05:51,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-12-21 18:05:51,195 INFO L87 Difference]: Start difference. First operand 318 states and 401 transitions. Second operand has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 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) [2021-12-21 18:05:51,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:51,877 INFO L93 Difference]: Finished difference Result 483 states and 610 transitions. [2021-12-21 18:05:51,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 18:05:51,877 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 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 84 [2021-12-21 18:05:51,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:51,880 INFO L225 Difference]: With dead ends: 483 [2021-12-21 18:05:51,881 INFO L226 Difference]: Without dead ends: 483 [2021-12-21 18:05:51,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-12-21 18:05:51,881 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 114 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 2086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1856 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:51,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 923 Invalid, 2086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 219 Invalid, 0 Unknown, 1856 Unchecked, 0.2s Time] [2021-12-21 18:05:51,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-12-21 18:05:51,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 333. [2021-12-21 18:05:51,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 225 states have (on average 1.4844444444444445) internal successors, (334), 301 states have internal predecessors, (334), 26 states have call successors, (26), 3 states have call predecessors, (26), 7 states have return successors, (68), 28 states have call predecessors, (68), 26 states have call successors, (68) [2021-12-21 18:05:51,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 428 transitions. [2021-12-21 18:05:51,893 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 428 transitions. Word has length 84 [2021-12-21 18:05:51,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:51,894 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 428 transitions. [2021-12-21 18:05:51,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 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) [2021-12-21 18:05:51,894 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 428 transitions. [2021-12-21 18:05:51,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-21 18:05:51,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:51,895 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 2, 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] [2021-12-21 18:05:51,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:52,111 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 [2021-12-21 18:05:52,111 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-12-21 18:05:52,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:52,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1414632217, now seen corresponding path program 3 times [2021-12-21 18:05:52,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:52,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057492972] [2021-12-21 18:05:52,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:52,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:52,122 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:52,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [897342360] [2021-12-21 18:05:52,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 18:05:52,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:52,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:52,124 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) [2021-12-21 18:05:52,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-21 18:05:52,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-21 18:05:52,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:05:52,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 18:05:52,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:52,419 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-21 18:05:52,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:05:52,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:52,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057492972] [2021-12-21 18:05:52,420 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:52,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897342360] [2021-12-21 18:05:52,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897342360] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:52,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:52,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:05:52,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872965188] [2021-12-21 18:05:52,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:52,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:05:52,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:52,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:05:52,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:05:52,422 INFO L87 Difference]: Start difference. First operand 333 states and 428 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 18:05:52,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:52,471 INFO L93 Difference]: Finished difference Result 298 states and 356 transitions. [2021-12-21 18:05:52,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:05:52,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 85 [2021-12-21 18:05:52,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:52,472 INFO L225 Difference]: With dead ends: 298 [2021-12-21 18:05:52,472 INFO L226 Difference]: Without dead ends: 288 [2021-12-21 18:05:52,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:05:52,473 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 17 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 709 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 [2021-12-21 18:05:52,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 709 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:05:52,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-12-21 18:05:52,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 270. [2021-12-21 18:05:52,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 174 states have (on average 1.5804597701149425) internal successors, (275), 248 states have internal predecessors, (275), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-21 18:05:52,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 311 transitions. [2021-12-21 18:05:52,481 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 311 transitions. Word has length 85 [2021-12-21 18:05:52,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:52,481 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 311 transitions. [2021-12-21 18:05:52,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 18:05:52,481 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 311 transitions. [2021-12-21 18:05:52,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-21 18:05:52,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:52,482 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, 1] [2021-12-21 18:05:52,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-21 18:05:52,700 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 [2021-12-21 18:05:52,700 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-12-21 18:05:52,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:52,701 INFO L85 PathProgramCache]: Analyzing trace with hash -560943855, now seen corresponding path program 4 times [2021-12-21 18:05:52,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:52,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640619013] [2021-12-21 18:05:52,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:52,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:52,714 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:52,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388109518] [2021-12-21 18:05:52,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 18:05:52,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:52,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:52,716 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) [2021-12-21 18:05:52,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-21 18:05:52,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 18:05:52,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:05:52,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-21 18:05:52,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:53,019 INFO L387 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 [2021-12-21 18:05:53,024 INFO L387 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 [2021-12-21 18:05:53,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:53,888 INFO L387 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 28 treesize of output 26 [2021-12-21 18:05:53,903 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:05:53,903 INFO L387 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 [2021-12-21 18:05:54,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:54,106 INFO L387 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 28 treesize of output 26 [2021-12-21 18:05:54,117 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:05:54,117 INFO L387 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 [2021-12-21 18:05:55,294 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 100 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-21 18:05:55,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:55,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:55,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640619013] [2021-12-21 18:05:55,517 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:55,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388109518] [2021-12-21 18:05:55,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388109518] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:55,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:05:55,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-12-21 18:05:55,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543464951] [2021-12-21 18:05:55,518 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:55,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 18:05:55,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:55,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 18:05:55,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-12-21 18:05:55,519 INFO L87 Difference]: Start difference. First operand 270 states and 311 transitions. Second operand has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 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) [2021-12-21 18:05:55,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:55,916 INFO L93 Difference]: Finished difference Result 417 states and 501 transitions. [2021-12-21 18:05:55,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 18:05:55,916 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 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 89 [2021-12-21 18:05:55,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:55,918 INFO L225 Difference]: With dead ends: 417 [2021-12-21 18:05:55,918 INFO L226 Difference]: Without dead ends: 417 [2021-12-21 18:05:55,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-12-21 18:05:55,919 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 114 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 2323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2089 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:55,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 1022 Invalid, 2323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 223 Invalid, 0 Unknown, 2089 Unchecked, 0.2s Time] [2021-12-21 18:05:55,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-12-21 18:05:55,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 313. [2021-12-21 18:05:55,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 211 states have (on average 1.5071090047393365) internal successors, (318), 285 states have internal predecessors, (318), 22 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (39), 24 states have call predecessors, (39), 22 states have call successors, (39) [2021-12-21 18:05:55,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 379 transitions. [2021-12-21 18:05:55,927 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 379 transitions. Word has length 89 [2021-12-21 18:05:55,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:55,927 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 379 transitions. [2021-12-21 18:05:55,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 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) [2021-12-21 18:05:55,928 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 379 transitions. [2021-12-21 18:05:55,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-21 18:05:55,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:55,929 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] [2021-12-21 18:05:55,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:56,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-21 18:05:56,151 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-12-21 18:05:56,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:56,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1182337176, now seen corresponding path program 5 times [2021-12-21 18:05:56,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:56,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052250633] [2021-12-21 18:05:56,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:56,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:56,173 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:56,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730375764] [2021-12-21 18:05:56,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 18:05:56,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:56,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:56,175 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:05:56,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-21 18:05:56,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:05:56,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:05:56,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 18:05:56,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 111 proven. 1 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-21 18:05:56,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:56,768 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-12-21 18:05:56,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:56,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052250633] [2021-12-21 18:05:56,769 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:56,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730375764] [2021-12-21 18:05:56,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730375764] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:05:56,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:05:56,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-21 18:05:56,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675870303] [2021-12-21 18:05:56,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:56,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 18:05:56,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:56,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 18:05:56,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:05:56,770 INFO L87 Difference]: Start difference. First operand 313 states and 379 transitions. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-21 18:05:56,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:56,946 INFO L93 Difference]: Finished difference Result 302 states and 347 transitions. [2021-12-21 18:05:56,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 18:05:56,946 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 90 [2021-12-21 18:05:56,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:56,947 INFO L225 Difference]: With dead ends: 302 [2021-12-21 18:05:56,947 INFO L226 Difference]: Without dead ends: 287 [2021-12-21 18:05:56,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-12-21 18:05:56,948 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 60 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:56,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1180 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:05:56,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-12-21 18:05:56,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-12-21 18:05:56,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 190 states have (on average 1.5473684210526315) internal successors, (294), 264 states have internal predecessors, (294), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-21 18:05:56,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 330 transitions. [2021-12-21 18:05:56,954 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 330 transitions. Word has length 90 [2021-12-21 18:05:56,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:56,955 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 330 transitions. [2021-12-21 18:05:56,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-21 18:05:56,955 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 330 transitions. [2021-12-21 18:05:56,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-21 18:05:56,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:56,956 INFO L514 BasicCegarLoop]: trace histogram [22, 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] [2021-12-21 18:05:56,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:57,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:57,171 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-12-21 18:05:57,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:57,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1234441241, now seen corresponding path program 6 times [2021-12-21 18:05:57,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:57,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316157413] [2021-12-21 18:05:57,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:57,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:57,191 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:57,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638884777] [2021-12-21 18:05:57,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 18:05:57,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:57,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:57,193 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:05:57,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-21 18:05:59,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-21 18:05:59,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:05:59,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-21 18:05:59,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:59,301 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 110 proven. 3 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-12-21 18:05:59,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 110 proven. 3 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-12-21 18:05:59,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:59,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316157413] [2021-12-21 18:05:59,565 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:59,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638884777] [2021-12-21 18:05:59,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638884777] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:05:59,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:05:59,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-21 18:05:59,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134840734] [2021-12-21 18:05:59,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:59,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 18:05:59,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:59,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 18:05:59,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-21 18:05:59,567 INFO L87 Difference]: Start difference. First operand 287 states and 330 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-21 18:05:59,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:59,846 INFO L93 Difference]: Finished difference Result 301 states and 346 transitions. [2021-12-21 18:05:59,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 18:05:59,847 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 105 [2021-12-21 18:05:59,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:59,848 INFO L225 Difference]: With dead ends: 301 [2021-12-21 18:05:59,848 INFO L226 Difference]: Without dead ends: 291 [2021-12-21 18:05:59,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-12-21 18:05:59,849 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 72 mSDsluCounter, 1409 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:59,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1649 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:05:59,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-12-21 18:05:59,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2021-12-21 18:05:59,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 194 states have (on average 1.5257731958762886) internal successors, (296), 268 states have internal predecessors, (296), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-21 18:05:59,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 332 transitions. [2021-12-21 18:05:59,855 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 332 transitions. Word has length 105 [2021-12-21 18:05:59,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:59,856 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 332 transitions. [2021-12-21 18:05:59,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-21 18:05:59,856 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 332 transitions. [2021-12-21 18:05:59,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-21 18:05:59,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:59,857 INFO L514 BasicCegarLoop]: trace histogram [26, 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] [2021-12-21 18:05:59,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-21 18:06:00,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:06:00,073 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-12-21 18:06:00,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:06:00,073 INFO L85 PathProgramCache]: Analyzing trace with hash 927290713, now seen corresponding path program 7 times [2021-12-21 18:06:00,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:06:00,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549327793] [2021-12-21 18:06:00,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:06:00,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:06:00,099 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:06:00,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194805004] [2021-12-21 18:06:00,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 18:06:00,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:06:00,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:06:00,101 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:06:00,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-21 18:06:01,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:06:01,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-21 18:06:01,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:06:01,321 INFO L387 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 [2021-12-21 18:06:01,720 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:06:01,720 INFO L387 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 [2021-12-21 18:06:01,728 INFO L387 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 12 treesize of output 14 [2021-12-21 18:06:01,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:06:01,896 INFO L387 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 12 treesize of output 14 [2021-12-21 18:06:01,905 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-21 18:06:01,905 INFO L387 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 [2021-12-21 18:06:01,977 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 326 proven. 116 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-12-21 18:06:01,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:06:02,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:06:02,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549327793] [2021-12-21 18:06:02,121 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:06:02,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194805004] [2021-12-21 18:06:02,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194805004] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:06:02,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:06:02,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-12-21 18:06:02,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108697258] [2021-12-21 18:06:02,122 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 18:06:02,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-21 18:06:02,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:06:02,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-21 18:06:02,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-12-21 18:06:02,123 INFO L87 Difference]: Start difference. First operand 291 states and 332 transitions. Second operand has 19 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 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) [2021-12-21 18:06:03,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:06:03,349 INFO L93 Difference]: Finished difference Result 516 states and 602 transitions. [2021-12-21 18:06:03,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 18:06:03,350 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 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 109 [2021-12-21 18:06:03,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:06:03,351 INFO L225 Difference]: With dead ends: 516 [2021-12-21 18:06:03,351 INFO L226 Difference]: Without dead ends: 516 [2021-12-21 18:06:03,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-12-21 18:06:03,352 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 292 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 2583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 713 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:06:03,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 793 Invalid, 2583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1829 Invalid, 0 Unknown, 713 Unchecked, 1.1s Time] [2021-12-21 18:06:03,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-12-21 18:06:03,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 299. [2021-12-21 18:06:03,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 202 states have (on average 1.5198019801980198) internal successors, (307), 276 states have internal predecessors, (307), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-21 18:06:03,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 343 transitions. [2021-12-21 18:06:03,360 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 343 transitions. Word has length 109 [2021-12-21 18:06:03,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:06:03,360 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 343 transitions. [2021-12-21 18:06:03,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 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) [2021-12-21 18:06:03,360 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 343 transitions. [2021-12-21 18:06:03,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-21 18:06:03,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:06:03,361 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1] [2021-12-21 18:06:03,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-21 18:06:03,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-21 18:06:03,575 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-12-21 18:06:03,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:06:03,575 INFO L85 PathProgramCache]: Analyzing trace with hash 2068145114, now seen corresponding path program 1 times [2021-12-21 18:06:03,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:06:03,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361880500] [2021-12-21 18:06:03,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:06:03,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:06:03,604 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:06:03,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1961478992] [2021-12-21 18:06:03,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:06:03,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:06:03,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:06:03,606 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:06:03,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-21 18:06:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:06:03,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 18:06:03,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:06:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-21 18:06:04,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:06:04,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:06:04,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361880500] [2021-12-21 18:06:04,092 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:06:04,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961478992] [2021-12-21 18:06:04,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961478992] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:06:04,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:06:04,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:06:04,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285604278] [2021-12-21 18:06:04,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:06:04,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:06:04,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:06:04,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:06:04,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:06:04,094 INFO L87 Difference]: Start difference. First operand 299 states and 343 transitions. Second operand has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 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) [2021-12-21 18:06:04,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:06:04,210 INFO L93 Difference]: Finished difference Result 304 states and 351 transitions. [2021-12-21 18:06:04,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:06:04,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 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 111 [2021-12-21 18:06:04,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:06:04,212 INFO L225 Difference]: With dead ends: 304 [2021-12-21 18:06:04,212 INFO L226 Difference]: Without dead ends: 304 [2021-12-21 18:06:04,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:06:04,213 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 76 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:06:04,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 358 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:06:04,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-12-21 18:06:04,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 298. [2021-12-21 18:06:04,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 202 states have (on average 1.5148514851485149) internal successors, (306), 275 states have internal predecessors, (306), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-21 18:06:04,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 342 transitions. [2021-12-21 18:06:04,218 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 342 transitions. Word has length 111 [2021-12-21 18:06:04,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:06:04,219 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 342 transitions. [2021-12-21 18:06:04,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 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) [2021-12-21 18:06:04,219 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 342 transitions. [2021-12-21 18:06:04,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-21 18:06:04,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:06:04,220 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1] [2021-12-21 18:06:04,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-21 18:06:04,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-21 18:06:04,435 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-12-21 18:06:04,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:06:04,436 INFO L85 PathProgramCache]: Analyzing trace with hash -807331391, now seen corresponding path program 1 times [2021-12-21 18:06:04,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:06:04,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36915179] [2021-12-21 18:06:04,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:06:04,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:06:04,456 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:06:04,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151427503] [2021-12-21 18:06:04,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:06:04,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:06:04,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:06:04,458 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:06:04,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-21 18:06:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:06:04,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-21 18:06:04,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:06:04,899 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:06:04,899 INFO L387 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 [2021-12-21 18:06:04,986 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:06:04,986 INFO L387 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 [2021-12-21 18:06:05,088 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:06:05,088 INFO L387 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 18 [2021-12-21 18:06:05,257 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:06:05,258 INFO L387 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 16 treesize of output 22 [2021-12-21 18:06:05,341 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 328 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-21 18:06:05,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:06:06,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:06:06,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36915179] [2021-12-21 18:06:06,196 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:06:06,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151427503] [2021-12-21 18:06:06,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151427503] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:06:06,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:06:06,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-12-21 18:06:06,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630233447] [2021-12-21 18:06:06,197 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 18:06:06,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-21 18:06:06,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:06:06,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-21 18:06:06,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-12-21 18:06:06,198 INFO L87 Difference]: Start difference. First operand 298 states and 342 transitions. Second operand has 21 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 17 states have internal predecessors, (74), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-21 18:06:10,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:06:10,858 INFO L93 Difference]: Finished difference Result 421 states and 488 transitions. [2021-12-21 18:06:10,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 18:06:10,859 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 17 states have internal predecessors, (74), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 115 [2021-12-21 18:06:10,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:06:10,860 INFO L225 Difference]: With dead ends: 421 [2021-12-21 18:06:10,860 INFO L226 Difference]: Without dead ends: 421 [2021-12-21 18:06:10,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 122 SyntacticMatches, 19 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-12-21 18:06:10,861 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 206 mSDsluCounter, 2438 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 2657 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 661 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:06:10,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 2657 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 814 Invalid, 0 Unknown, 661 Unchecked, 0.4s Time] [2021-12-21 18:06:10,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-12-21 18:06:10,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 411. [2021-12-21 18:06:10,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 302 states have (on average 1.403973509933775) internal successors, (424), 374 states have internal predecessors, (424), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-21 18:06:10,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 482 transitions. [2021-12-21 18:06:10,869 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 482 transitions. Word has length 115 [2021-12-21 18:06:10,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:06:10,869 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 482 transitions. [2021-12-21 18:06:10,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 17 states have internal predecessors, (74), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-21 18:06:10,870 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 482 transitions. [2021-12-21 18:06:10,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-21 18:06:10,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:06:10,871 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1] [2021-12-21 18:06:10,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-21 18:06:11,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:06:11,071 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-12-21 18:06:11,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:06:11,072 INFO L85 PathProgramCache]: Analyzing trace with hash -807331390, now seen corresponding path program 1 times [2021-12-21 18:06:11,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:06:11,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126667589] [2021-12-21 18:06:11,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:06:11,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:06:11,105 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:06:11,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1199158915] [2021-12-21 18:06:11,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:06:11,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:06:11,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:06:11,107 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:06:11,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-21 18:06:15,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:06:15,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 140 conjunts are in the unsatisfiable core [2021-12-21 18:06:15,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:06:15,306 INFO L387 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-12-21 18:06:15,332 INFO L387 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 [2021-12-21 18:06:16,204 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:06:16,204 INFO L387 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 [2021-12-21 18:06:16,280 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:06:16,280 INFO L387 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 [2021-12-21 18:06:16,839 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:06:16,839 INFO L387 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 [2021-12-21 18:06:16,915 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:06:16,915 INFO L387 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