./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ss4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/ss4.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cb671fec0d42514b04873418e954f5a2df95ef7f393045434a478c03667a31d2 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 08:54:20,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 08:54:20,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 08:54:20,351 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 08:54:20,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 08:54:20,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 08:54:20,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 08:54:20,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 08:54:20,364 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 08:54:20,369 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 08:54:20,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 08:54:20,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 08:54:20,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 08:54:20,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 08:54:20,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 08:54:20,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 08:54:20,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 08:54:20,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 08:54:20,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 08:54:20,387 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 08:54:20,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 08:54:20,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 08:54:20,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 08:54:20,394 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 08:54:20,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 08:54:20,398 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 08:54:20,398 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 08:54:20,399 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 08:54:20,400 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 08:54:20,400 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 08:54:20,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 08:54:20,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 08:54:20,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 08:54:20,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 08:54:20,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 08:54:20,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 08:54:20,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 08:54:20,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 08:54:20,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 08:54:20,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 08:54:20,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 08:54:20,408 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 08:54:20,448 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 08:54:20,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 08:54:20,449 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 08:54:20,449 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 08:54:20,450 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 08:54:20,451 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 08:54:20,451 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 08:54:20,451 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 08:54:20,451 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 08:54:20,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 08:54:20,452 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 08:54:20,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 08:54:20,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 08:54:20,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 08:54:20,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 08:54:20,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 08:54:20,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 08:54:20,454 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 08:54:20,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 08:54:20,454 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 08:54:20,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 08:54:20,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 08:54:20,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 08:54:20,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 08:54:20,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:54:20,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 08:54:20,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 08:54:20,457 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 08:54:20,457 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 08:54:20,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 08:54:20,457 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 08:54:20,458 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 08:54:20,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 08:54:20,458 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 08:54:20,458 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb671fec0d42514b04873418e954f5a2df95ef7f393045434a478c03667a31d2 [2021-12-15 08:54:20,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 08:54:20,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 08:54:20,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 08:54:20,730 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 08:54:20,731 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 08:54:20,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ss4.c [2021-12-15 08:54:20,792 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01143865a/5e2ad46f8e5e4cadaa06d563a4635bf7/FLAG238d43dde [2021-12-15 08:54:21,139 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 08:54:21,139 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ss4.c [2021-12-15 08:54:21,146 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01143865a/5e2ad46f8e5e4cadaa06d563a4635bf7/FLAG238d43dde [2021-12-15 08:54:21,566 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01143865a/5e2ad46f8e5e4cadaa06d563a4635bf7 [2021-12-15 08:54:21,572 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 08:54:21,574 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 08:54:21,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 08:54:21,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 08:54:21,578 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 08:54:21,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:54:21" (1/1) ... [2021-12-15 08:54:21,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1360384e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:21, skipping insertion in model container [2021-12-15 08:54:21,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:54:21" (1/1) ... [2021-12-15 08:54:21,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 08:54:21,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 08:54:21,744 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ss4.c[586,599] [2021-12-15 08:54:21,763 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:54:21,770 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 08:54:21,779 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ss4.c[586,599] [2021-12-15 08:54:21,786 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:54:21,797 INFO L208 MainTranslator]: Completed translation [2021-12-15 08:54:21,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:21 WrapperNode [2021-12-15 08:54:21,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 08:54:21,799 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 08:54:21,799 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 08:54:21,799 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 08:54:21,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:21" (1/1) ... [2021-12-15 08:54:21,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:21" (1/1) ... [2021-12-15 08:54:21,827 INFO L137 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2021-12-15 08:54:21,828 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 08:54:21,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 08:54:21,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 08:54:21,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 08:54:21,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:21" (1/1) ... [2021-12-15 08:54:21,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:21" (1/1) ... [2021-12-15 08:54:21,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:21" (1/1) ... [2021-12-15 08:54:21,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:21" (1/1) ... [2021-12-15 08:54:21,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:21" (1/1) ... [2021-12-15 08:54:21,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:21" (1/1) ... [2021-12-15 08:54:21,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:21" (1/1) ... [2021-12-15 08:54:21,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 08:54:21,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 08:54:21,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 08:54:21,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 08:54:21,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:21" (1/1) ... [2021-12-15 08:54:21,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:54:21,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:54:21,884 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 08:54:21,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 08:54:21,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 08:54:21,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 08:54:21,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 08:54:21,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 08:54:21,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 08:54:21,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 08:54:21,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 08:54:21,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 08:54:21,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 08:54:21,975 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 08:54:21,977 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 08:54:22,120 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 08:54:22,125 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 08:54:22,126 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-15 08:54:22,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:54:22 BoogieIcfgContainer [2021-12-15 08:54:22,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 08:54:22,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 08:54:22,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 08:54:22,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 08:54:22,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:54:21" (1/3) ... [2021-12-15 08:54:22,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f4486cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:54:22, skipping insertion in model container [2021-12-15 08:54:22,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:21" (2/3) ... [2021-12-15 08:54:22,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f4486cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:54:22, skipping insertion in model container [2021-12-15 08:54:22,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:54:22" (3/3) ... [2021-12-15 08:54:22,135 INFO L111 eAbstractionObserver]: Analyzing ICFG ss4.c [2021-12-15 08:54:22,140 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 08:54:22,140 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 08:54:22,181 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 08:54:22,188 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 08:54:22,188 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 08:54:22,207 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:22,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 08:54:22,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:22,219 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:22,219 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:22,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:22,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1202110748, now seen corresponding path program 1 times [2021-12-15 08:54:22,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:22,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724370460] [2021-12-15 08:54:22,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:22,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:54:22,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:22,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724370460] [2021-12-15 08:54:22,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724370460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:54:22,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:54:22,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 08:54:22,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966574279] [2021-12-15 08:54:22,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:54:22,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 08:54:22,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:54:22,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 08:54:22,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 08:54:22,453 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:22,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:54:22,466 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2021-12-15 08:54:22,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 08:54:22,468 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 15 [2021-12-15 08:54:22,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:54:22,474 INFO L225 Difference]: With dead ends: 44 [2021-12-15 08:54:22,475 INFO L226 Difference]: Without dead ends: 20 [2021-12-15 08:54:22,477 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 [2021-12-15 08:54:22,480 INFO L933 BasicCegarLoop]: 28 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, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:54:22,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:54:22,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-15 08:54:22,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-15 08:54:22,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:22,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-12-15 08:54:22,513 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 15 [2021-12-15 08:54:22,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:54:22,513 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-12-15 08:54:22,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:22,514 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-12-15 08:54:22,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 08:54:22,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:22,515 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:22,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 08:54:22,515 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:22,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:22,516 INFO L85 PathProgramCache]: Analyzing trace with hash -944124056, now seen corresponding path program 1 times [2021-12-15 08:54:22,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:22,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821530828] [2021-12-15 08:54:22,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:22,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:22,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:54:22,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:22,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821530828] [2021-12-15 08:54:22,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821530828] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:54:22,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:54:22,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:54:22,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874310511] [2021-12-15 08:54:22,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:54:22,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:54:22,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:54:22,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:54:22,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:54:22,611 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:22,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:54:22,687 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2021-12-15 08:54:22,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:54:22,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 15 [2021-12-15 08:54:22,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:54:22,690 INFO L225 Difference]: With dead ends: 41 [2021-12-15 08:54:22,691 INFO L226 Difference]: Without dead ends: 28 [2021-12-15 08:54:22,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:54:22,696 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:54:22,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 12 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:54:22,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-15 08:54:22,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-12-15 08:54:22,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:22,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-15 08:54:22,703 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2021-12-15 08:54:22,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:54:22,703 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-15 08:54:22,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:22,704 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-15 08:54:22,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-15 08:54:22,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:22,705 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:22,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 08:54:22,705 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:22,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:22,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1401448688, now seen corresponding path program 1 times [2021-12-15 08:54:22,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:22,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958917926] [2021-12-15 08:54:22,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:22,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:22,737 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 08:54:22,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966670051] [2021-12-15 08:54:22,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:22,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:54:22,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:54:22,740 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:54:22,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 08:54:22,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:22,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-15 08:54:22,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:54:22,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 08:54:22,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 08:54:22,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-15 08:54:23,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-12-15 08:54:23,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 23 [2021-12-15 08:54:23,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-12-15 08:54:23,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-12-15 08:54:23,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 31 [2021-12-15 08:54:23,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:54:23,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:54:34,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:54:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:54:34,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:34,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958917926] [2021-12-15 08:54:34,827 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 08:54:34,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966670051] [2021-12-15 08:54:34,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966670051] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:54:34,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 08:54:34,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-12-15 08:54:34,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958739400] [2021-12-15 08:54:34,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 08:54:34,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-15 08:54:34,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:54:34,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-15 08:54:34,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=491, Unknown=2, NotChecked=0, Total=600 [2021-12-15 08:54:34,831 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:35,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:54:35,532 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-12-15 08:54:35,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-15 08:54:35,533 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-15 08:54:35,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:54:35,534 INFO L225 Difference]: With dead ends: 44 [2021-12-15 08:54:35,534 INFO L226 Difference]: Without dead ends: 40 [2021-12-15 08:54:35,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=155, Invalid=713, Unknown=2, NotChecked=0, Total=870 [2021-12-15 08:54:35,536 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 08:54:35,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 70 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 271 Invalid, 0 Unknown, 4 Unchecked, 0.4s Time] [2021-12-15 08:54:35,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-15 08:54:35,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-12-15 08:54:35,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:35,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-12-15 08:54:35,542 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 23 [2021-12-15 08:54:35,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:54:35,543 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-12-15 08:54:35,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:35,543 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-12-15 08:54:35,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 08:54:35,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:35,544 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:35,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 08:54:35,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:54:35,760 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:35,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:35,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1774307726, now seen corresponding path program 2 times [2021-12-15 08:54:35,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:35,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124495236] [2021-12-15 08:54:35,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:35,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:35,803 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 08:54:35,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121035469] [2021-12-15 08:54:35,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:54:35,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:54:35,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:54:35,806 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:54:35,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 08:54:35,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:54:35,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:54:35,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 08:54:35,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:54:35,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 08:54:35,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:54:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 08:54:36,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:36,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124495236] [2021-12-15 08:54:36,007 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 08:54:36,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121035469] [2021-12-15 08:54:36,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121035469] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:54:36,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 08:54:36,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-15 08:54:36,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992017618] [2021-12-15 08:54:36,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 08:54:36,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 08:54:36,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:54:36,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 08:54:36,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-15 08:54:36,014 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:36,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:54:36,146 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2021-12-15 08:54:36,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 08:54:36,147 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-15 08:54:36,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:54:36,148 INFO L225 Difference]: With dead ends: 79 [2021-12-15 08:54:36,148 INFO L226 Difference]: Without dead ends: 53 [2021-12-15 08:54:36,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-15 08:54:36,151 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 56 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:54:36,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 32 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:54:36,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-15 08:54:36,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2021-12-15 08:54:36,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:36,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-12-15 08:54:36,166 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 25 [2021-12-15 08:54:36,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:54:36,166 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-12-15 08:54:36,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:36,166 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-12-15 08:54:36,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 08:54:36,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:36,170 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:36,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 08:54:36,393 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,SelfDestructingSolverStorable3 [2021-12-15 08:54:36,393 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:36,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:36,394 INFO L85 PathProgramCache]: Analyzing trace with hash 119582130, now seen corresponding path program 3 times [2021-12-15 08:54:36,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:36,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064432796] [2021-12-15 08:54:36,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:36,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:36,424 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 08:54:36,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709525272] [2021-12-15 08:54:36,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:54:36,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:54:36,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:54:36,426 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:54:36,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 08:54:36,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-15 08:54:36,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:54:36,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 08:54:36,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:54:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 08:54:36,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:54:36,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 08:54:36,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:36,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064432796] [2021-12-15 08:54:36,600 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 08:54:36,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709525272] [2021-12-15 08:54:36,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709525272] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:54:36,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 08:54:36,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-15 08:54:36,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258779335] [2021-12-15 08:54:36,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 08:54:36,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 08:54:36,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:54:36,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 08:54:36,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-15 08:54:36,602 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:36,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:54:36,720 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2021-12-15 08:54:36,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 08:54:36,720 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-15 08:54:36,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:54:36,721 INFO L225 Difference]: With dead ends: 47 [2021-12-15 08:54:36,721 INFO L226 Difference]: Without dead ends: 35 [2021-12-15 08:54:36,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-12-15 08:54:36,724 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:54:36,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 23 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:54:36,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-15 08:54:36,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-12-15 08:54:36,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:36,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-12-15 08:54:36,732 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 25 [2021-12-15 08:54:36,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:54:36,733 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-12-15 08:54:36,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:36,733 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-12-15 08:54:36,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-15 08:54:36,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:36,734 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:36,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 08:54:36,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:54:36,947 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:36,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:36,948 INFO L85 PathProgramCache]: Analyzing trace with hash 666081912, now seen corresponding path program 4 times [2021-12-15 08:54:36,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:36,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143828462] [2021-12-15 08:54:36,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:36,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:36,974 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 08:54:36,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660511475] [2021-12-15 08:54:36,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 08:54:36,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:54:36,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:54:36,981 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:54:36,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 08:54:37,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 08:54:37,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:54:37,046 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-15 08:54:37,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:54:37,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 08:54:37,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:54:37,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-15 08:54:37,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:54:37,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:54:37,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2021-12-15 08:54:37,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:54:37,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:54:37,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:54:37,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-12-15 08:54:37,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:54:37,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:54:37,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2021-12-15 08:54:37,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:54:37,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:54:37,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:54:37,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 41 [2021-12-15 08:54:37,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:54:37,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:54:37,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 39 [2021-12-15 08:54:37,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:54:37,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:54:37,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-12-15 08:54:37,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:54:37,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:54:37,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:54:37,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-12-15 08:54:37,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:54:37,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2021-12-15 08:54:38,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:54:38,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 34 [2021-12-15 08:54:38,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:54:38,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:55:07,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:07,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:55:07,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143828462] [2021-12-15 08:55:07,371 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 08:55:07,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660511475] [2021-12-15 08:55:07,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660511475] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:55:07,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 08:55:07,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-12-15 08:55:07,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177789970] [2021-12-15 08:55:07,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 08:55:07,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-15 08:55:07,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:55:07,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-15 08:55:07,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1334, Unknown=5, NotChecked=0, Total=1482 [2021-12-15 08:55:07,374 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 39 states, 39 states have (on average 1.435897435897436) internal successors, (56), 39 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:15,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:55:15,865 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2021-12-15 08:55:15,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-15 08:55:15,866 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.435897435897436) internal successors, (56), 39 states have internal predecessors, (56), 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 31 [2021-12-15 08:55:15,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:55:15,867 INFO L225 Difference]: With dead ends: 70 [2021-12-15 08:55:15,867 INFO L226 Difference]: Without dead ends: 58 [2021-12-15 08:55:15,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=206, Invalid=2045, Unknown=5, NotChecked=0, Total=2256 [2021-12-15 08:55:15,868 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:55:15,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 104 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 629 Invalid, 0 Unknown, 197 Unchecked, 3.3s Time] [2021-12-15 08:55:15,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-15 08:55:15,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2021-12-15 08:55:15,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:15,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-12-15 08:55:15,875 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 31 [2021-12-15 08:55:15,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:55:15,875 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-12-15 08:55:15,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.435897435897436) internal successors, (56), 39 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:15,876 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-12-15 08:55:15,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-15 08:55:15,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:15,877 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:55:15,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-15 08:55:16,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:55:16,080 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:55:16,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:55:16,080 INFO L85 PathProgramCache]: Analyzing trace with hash 207824378, now seen corresponding path program 5 times [2021-12-15 08:55:16,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:55:16,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503960871] [2021-12-15 08:55:16,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:55:16,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:55:16,109 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 08:55:16,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051455076] [2021-12-15 08:55:16,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 08:55:16,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:55:16,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:55:16,110 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:55:16,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 08:55:16,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-15 08:55:16,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:55:16,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 08:55:16,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:55:16,308 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 08:55:16,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:55:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 08:55:16,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:55:16,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503960871] [2021-12-15 08:55:16,377 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 08:55:16,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051455076] [2021-12-15 08:55:16,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051455076] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:55:16,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 08:55:16,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-15 08:55:16,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260117924] [2021-12-15 08:55:16,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 08:55:16,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-15 08:55:16,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:55:16,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-15 08:55:16,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-15 08:55:16,378 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:16,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:55:16,546 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2021-12-15 08:55:16,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 08:55:16,546 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-15 08:55:16,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:55:16,547 INFO L225 Difference]: With dead ends: 101 [2021-12-15 08:55:16,547 INFO L226 Difference]: Without dead ends: 65 [2021-12-15 08:55:16,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-12-15 08:55:16,549 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 94 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:55:16,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 30 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:55:16,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-15 08:55:16,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2021-12-15 08:55:16,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:16,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2021-12-15 08:55:16,556 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 33 [2021-12-15 08:55:16,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:55:16,556 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2021-12-15 08:55:16,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:16,556 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2021-12-15 08:55:16,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-15 08:55:16,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:16,557 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:55:16,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 08:55:16,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:55:16,757 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:55:16,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:55:16,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1285815610, now seen corresponding path program 6 times [2021-12-15 08:55:16,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:55:16,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473234204] [2021-12-15 08:55:16,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:55:16,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:55:16,775 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 08:55:16,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887996593] [2021-12-15 08:55:16,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 08:55:16,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:55:16,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:55:16,777 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:55:16,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 08:55:16,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-15 08:55:16,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:55:16,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 08:55:16,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:55:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 08:55:16,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:55:17,059 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 08:55:17,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:55:17,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473234204] [2021-12-15 08:55:17,059 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 08:55:17,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887996593] [2021-12-15 08:55:17,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887996593] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:55:17,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 08:55:17,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-15 08:55:17,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069652382] [2021-12-15 08:55:17,060 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 08:55:17,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-15 08:55:17,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:55:17,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-15 08:55:17,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-15 08:55:17,061 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:17,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:55:17,182 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-12-15 08:55:17,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 08:55:17,183 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-15 08:55:17,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:55:17,183 INFO L225 Difference]: With dead ends: 59 [2021-12-15 08:55:17,183 INFO L226 Difference]: Without dead ends: 43 [2021-12-15 08:55:17,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-12-15 08:55:17,184 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 86 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:55:17,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 17 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:55:17,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-15 08:55:17,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-12-15 08:55:17,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:17,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-12-15 08:55:17,189 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 33 [2021-12-15 08:55:17,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:55:17,190 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-12-15 08:55:17,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:17,190 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-12-15 08:55:17,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-15 08:55:17,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:17,191 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:55:17,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 08:55:17,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:55:17,413 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:55:17,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:55:17,413 INFO L85 PathProgramCache]: Analyzing trace with hash 315843584, now seen corresponding path program 7 times [2021-12-15 08:55:17,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:55:17,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506467382] [2021-12-15 08:55:17,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:55:17,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:55:17,445 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 08:55:17,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113143506] [2021-12-15 08:55:17,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 08:55:17,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:55:17,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:55:17,447 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:55:17,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 08:55:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:55:17,517 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 94 conjunts are in the unsatisfiable core [2021-12-15 08:55:17,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:55:17,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 08:55:17,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 08:55:17,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-15 08:55:17,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:17,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-12-15 08:55:17,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:17,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:17,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:17,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 47 [2021-12-15 08:55:17,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:17,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:55:17,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:17,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:17,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-12-15 08:55:17,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:17,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:17,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:17,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:17,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:17,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:55:17,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 54 [2021-12-15 08:55:18,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:18,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:18,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:18,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 49 [2021-12-15 08:55:18,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:18,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:55:18,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:18,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:18,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 54 [2021-12-15 08:55:18,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:18,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:18,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:18,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:18,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:18,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:55:18,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 60 [2021-12-15 08:55:18,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:18,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:18,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:18,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 51 [2021-12-15 08:55:18,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:18,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:18,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:18,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-12-15 08:55:18,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:18,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:55:18,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:18,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:18,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-12-15 08:55:18,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:18,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:18,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:18,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:18,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:55:18,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:55:18,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 49 [2021-12-15 08:55:18,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 47 [2021-12-15 08:55:19,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 39 [2021-12-15 08:55:19,113 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:19,114 INFO L328 TraceCheckSpWp]: Computing backward predicates...