./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array4_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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-patterns/array4_pattern.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 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 11:30:48,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 11:30:48,662 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 11:30:48,682 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 11:30:48,683 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 11:30:48,683 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 11:30:48,684 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 11:30:48,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 11:30:48,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 11:30:48,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 11:30:48,688 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 11:30:48,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 11:30:48,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 11:30:48,689 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 11:30:48,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 11:30:48,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 11:30:48,694 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 11:30:48,695 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 11:30:48,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 11:30:48,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 11:30:48,700 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 11:30:48,701 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 11:30:48,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 11:30:48,703 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 11:30:48,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 11:30:48,704 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 11:30:48,705 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 11:30:48,705 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 11:30:48,706 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 11:30:48,706 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 11:30:48,706 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 11:30:48,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 11:30:48,709 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 11:30:48,709 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 11:30:48,710 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 11:30:48,710 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 11:30:48,710 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 11:30:48,711 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 11:30:48,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 11:30:48,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 11:30:48,712 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 11:30:48,713 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 11:30:48,727 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 11:30:48,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 11:30:48,728 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 11:30:48,728 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 11:30:48,728 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 11:30:48,728 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 11:30:48,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 11:30:48,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 11:30:48,729 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 11:30:48,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 11:30:48,729 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 11:30:48,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 11:30:48,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 11:30:48,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 11:30:48,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 11:30:48,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 11:30:48,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 11:30:48,731 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 11:30:48,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 11:30:48,731 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 11:30:48,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 11:30:48,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 11:30:48,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 11:30:48,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 11:30:48,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:30:48,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 11:30:48,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 11:30:48,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 11:30:48,732 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 11:30:48,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 11:30:48,733 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 11:30:48,733 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 11:30:48,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 11:30:48,733 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 11:30:48,733 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2021-12-14 11:30:48,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 11:30:48,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 11:30:48,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 11:30:48,943 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 11:30:48,945 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 11:30:48,946 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array4_pattern.c [2021-12-14 11:30:48,990 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/206fe56d2/71db7f1ee62b40ba9d4249cb52310d85/FLAG9a012cb87 [2021-12-14 11:30:49,380 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 11:30:49,380 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c [2021-12-14 11:30:49,389 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/206fe56d2/71db7f1ee62b40ba9d4249cb52310d85/FLAG9a012cb87 [2021-12-14 11:30:49,401 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/206fe56d2/71db7f1ee62b40ba9d4249cb52310d85 [2021-12-14 11:30:49,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 11:30:49,406 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 11:30:49,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 11:30:49,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 11:30:49,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 11:30:49,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:30:49" (1/1) ... [2021-12-14 11:30:49,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@196f33c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:49, skipping insertion in model container [2021-12-14 11:30:49,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:30:49" (1/1) ... [2021-12-14 11:30:49,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 11:30:49,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 11:30:49,551 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-patterns/array4_pattern.c[1835,1848] [2021-12-14 11:30:49,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:30:49,581 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 11:30:49,591 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-patterns/array4_pattern.c[1835,1848] [2021-12-14 11:30:49,603 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:30:49,611 INFO L208 MainTranslator]: Completed translation [2021-12-14 11:30:49,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:49 WrapperNode [2021-12-14 11:30:49,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 11:30:49,612 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 11:30:49,613 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 11:30:49,613 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 11:30:49,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:49" (1/1) ... [2021-12-14 11:30:49,631 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:49" (1/1) ... [2021-12-14 11:30:49,648 INFO L137 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 93 [2021-12-14 11:30:49,649 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 11:30:49,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 11:30:49,650 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 11:30:49,650 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 11:30:49,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:49" (1/1) ... [2021-12-14 11:30:49,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:49" (1/1) ... [2021-12-14 11:30:49,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:49" (1/1) ... [2021-12-14 11:30:49,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:49" (1/1) ... [2021-12-14 11:30:49,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:49" (1/1) ... [2021-12-14 11:30:49,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:49" (1/1) ... [2021-12-14 11:30:49,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:49" (1/1) ... [2021-12-14 11:30:49,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 11:30:49,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 11:30:49,672 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 11:30:49,672 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 11:30:49,673 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:49" (1/1) ... [2021-12-14 11:30:49,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:30:49,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:30:49,691 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) [2021-12-14 11:30:49,695 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 [2021-12-14 11:30:49,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 11:30:49,715 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 11:30:49,715 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 11:30:49,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 11:30:49,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 11:30:49,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 11:30:49,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 11:30:49,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 11:30:49,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 11:30:49,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 11:30:49,756 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 11:30:49,757 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 11:30:49,855 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 11:30:49,859 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 11:30:49,859 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-14 11:30:49,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:30:49 BoogieIcfgContainer [2021-12-14 11:30:49,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 11:30:49,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 11:30:49,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 11:30:49,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 11:30:49,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:30:49" (1/3) ... [2021-12-14 11:30:49,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28614a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:30:49, skipping insertion in model container [2021-12-14 11:30:49,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:49" (2/3) ... [2021-12-14 11:30:49,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28614a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:30:49, skipping insertion in model container [2021-12-14 11:30:49,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:30:49" (3/3) ... [2021-12-14 11:30:49,865 INFO L111 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2021-12-14 11:30:49,868 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 11:30:49,869 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 11:30:49,896 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 11:30:49,900 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 [2021-12-14 11:30:49,901 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 11:30:49,910 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-14 11:30:49,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 11:30:49,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:30:49,913 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:30:49,914 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:30:49,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:30:49,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1359011546, now seen corresponding path program 1 times [2021-12-14 11:30:49,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:30:49,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697563052] [2021-12-14 11:30:49,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:30:49,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:30:49,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:30:50,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 11:30:50,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:30:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:30:50,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:30:50,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697563052] [2021-12-14 11:30:50,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697563052] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:30:50,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:30:50,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 11:30:50,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551045476] [2021-12-14 11:30:50,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:30:50,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 11:30:50,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:30:50,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 11:30:50,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 11:30:50,041 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 11:30:50,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:30:50,054 INFO L93 Difference]: Finished difference Result 63 states and 93 transitions. [2021-12-14 11:30:50,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 11:30:50,059 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-14 11:30:50,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:30:50,064 INFO L225 Difference]: With dead ends: 63 [2021-12-14 11:30:50,064 INFO L226 Difference]: Without dead ends: 29 [2021-12-14 11:30:50,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 11:30:50,083 INFO L933 BasicCegarLoop]: 40 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, 40 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 [2021-12-14 11:30:50,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:30:50,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-14 11:30:50,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-14 11:30:50,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-14 11:30:50,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-12-14 11:30:50,108 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 16 [2021-12-14 11:30:50,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:30:50,109 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-12-14 11:30:50,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 11:30:50,109 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-12-14 11:30:50,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-14 11:30:50,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:30:50,111 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:30:50,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 11:30:50,112 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:30:50,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:30:50,113 INFO L85 PathProgramCache]: Analyzing trace with hash -852430543, now seen corresponding path program 1 times [2021-12-14 11:30:50,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:30:50,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409681211] [2021-12-14 11:30:50,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:30:50,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:30:50,143 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:30:50,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717852474] [2021-12-14 11:30:50,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:30:50,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:30:50,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:30:50,145 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) [2021-12-14 11:30:50,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 11:30:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:30:50,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 11:30:50,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:30:50,352 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 11:30:50,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 11:30:50,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:30:50,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409681211] [2021-12-14 11:30:50,353 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:30:50,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717852474] [2021-12-14 11:30:50,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717852474] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:30:50,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:30:50,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 11:30:50,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104620307] [2021-12-14 11:30:50,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:30:50,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 11:30:50,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:30:50,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 11:30:50,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:30:50,365 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 11:30:50,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:30:50,410 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2021-12-14 11:30:50,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 11:30:50,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2021-12-14 11:30:50,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:30:50,415 INFO L225 Difference]: With dead ends: 70 [2021-12-14 11:30:50,415 INFO L226 Difference]: Without dead ends: 48 [2021-12-14 11:30:50,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:30:50,418 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:30:50,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 53 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:30:50,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-14 11:30:50,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2021-12-14 11:30:50,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-14 11:30:50,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2021-12-14 11:30:50,433 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 42 [2021-12-14 11:30:50,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:30:50,435 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2021-12-14 11:30:50,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 11:30:50,435 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2021-12-14 11:30:50,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-14 11:30:50,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:30:50,437 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:30:50,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 11:30:50,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:30:50,640 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:30:50,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:30:50,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1661777169, now seen corresponding path program 1 times [2021-12-14 11:30:50,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:30:50,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405812238] [2021-12-14 11:30:50,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:30:50,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:30:50,671 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:30:50,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111019248] [2021-12-14 11:30:50,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:30:50,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:30:50,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:30:50,673 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) [2021-12-14 11:30:50,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 11:30:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:30:50,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 11:30:50,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:30:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 11:30:50,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 11:30:50,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:30:50,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405812238] [2021-12-14 11:30:50,823 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:30:50,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111019248] [2021-12-14 11:30:50,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111019248] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:30:50,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:30:50,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 11:30:50,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737369195] [2021-12-14 11:30:50,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:30:50,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 11:30:50,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:30:50,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 11:30:50,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 11:30:50,825 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 11:30:50,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:30:50,846 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-12-14 11:30:50,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 11:30:50,847 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2021-12-14 11:30:50,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:30:50,849 INFO L225 Difference]: With dead ends: 43 [2021-12-14 11:30:50,850 INFO L226 Difference]: Without dead ends: 39 [2021-12-14 11:30:50,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 11:30:50,852 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:30:50,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 81 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:30:50,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-14 11:30:50,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-14 11:30:50,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-14 11:30:50,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2021-12-14 11:30:50,877 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 42 [2021-12-14 11:30:50,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:30:50,878 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2021-12-14 11:30:50,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 11:30:50,879 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2021-12-14 11:30:50,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 11:30:50,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:30:50,880 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:30:50,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 11:30:51,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-14 11:30:51,095 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:30:51,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:30:51,096 INFO L85 PathProgramCache]: Analyzing trace with hash 813208561, now seen corresponding path program 1 times [2021-12-14 11:30:51,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:30:51,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110250136] [2021-12-14 11:30:51,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:30:51,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:30:51,113 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:30:51,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15329217] [2021-12-14 11:30:51,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:30:51,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:30:51,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:30:51,114 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) [2021-12-14 11:30:51,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 11:30:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:30:51,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 11:30:51,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:30:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-14 11:30:51,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 11:30:51,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:30:51,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110250136] [2021-12-14 11:30:51,259 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:30:51,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15329217] [2021-12-14 11:30:51,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15329217] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:30:51,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:30:51,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 11:30:51,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667773581] [2021-12-14 11:30:51,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:30:51,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 11:30:51,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:30:51,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 11:30:51,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 11:30:51,261 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 11:30:51,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:30:51,317 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2021-12-14 11:30:51,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 11:30:51,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2021-12-14 11:30:51,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:30:51,318 INFO L225 Difference]: With dead ends: 77 [2021-12-14 11:30:51,319 INFO L226 Difference]: Without dead ends: 43 [2021-12-14 11:30:51,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 11:30:51,320 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:30:51,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 102 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:30:51,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-14 11:30:51,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-12-14 11:30:51,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-14 11:30:51,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-12-14 11:30:51,324 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 44 [2021-12-14 11:30:51,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:30:51,324 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-12-14 11:30:51,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 11:30:51,325 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-12-14 11:30:51,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-14 11:30:51,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:30:51,326 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:30:51,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 11:30:51,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:30:51,542 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:30:51,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:30:51,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1843316237, now seen corresponding path program 1 times [2021-12-14 11:30:51,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:30:51,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951486942] [2021-12-14 11:30:51,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:30:51,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:30:51,563 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:30:51,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281444703] [2021-12-14 11:30:51,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:30:51,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:30:51,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:30:51,565 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) [2021-12-14 11:30:51,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 11:30:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:30:51,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-14 11:30:51,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:30:51,664 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 [2021-12-14 11:30:51,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:30:51,714 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 18 treesize of output 18 [2021-12-14 11:30:51,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-14 11:30:52,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 11:30:52,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 26 [2021-12-14 11:30:52,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 11:30:52,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 11:30:52,596 INFO L354 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2021-12-14 11:30:52,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 24 [2021-12-14 11:30:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 11:30:52,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:31:01,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:31:01,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951486942] [2021-12-14 11:31:01,820 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:31:01,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281444703] [2021-12-14 11:31:01,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281444703] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:31:01,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-14 11:31:01,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-12-14 11:31:01,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134535388] [2021-12-14 11:31:01,820 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-14 11:31:01,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 11:31:01,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:31:01,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 11:31:01,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=449, Unknown=8, NotChecked=0, Total=552 [2021-12-14 11:31:01,821 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-14 11:31:04,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:31:04,030 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2021-12-14 11:31:04,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 11:31:04,030 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 46 [2021-12-14 11:31:04,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:31:04,031 INFO L225 Difference]: With dead ends: 79 [2021-12-14 11:31:04,031 INFO L226 Difference]: Without dead ends: 75 [2021-12-14 11:31:04,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=124, Invalid=622, Unknown=10, NotChecked=0, Total=756 [2021-12-14 11:31:04,032 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 35 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:31:04,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 254 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 111 Invalid, 0 Unknown, 157 Unchecked, 0.1s Time] [2021-12-14 11:31:04,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-14 11:31:04,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2021-12-14 11:31:04,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-14 11:31:04,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2021-12-14 11:31:04,039 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 46 [2021-12-14 11:31:04,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:31:04,039 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2021-12-14 11:31:04,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-14 11:31:04,040 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2021-12-14 11:31:04,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-14 11:31:04,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:31:04,042 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:31:04,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 11:31:04,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:31:04,255 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:31:04,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:31:04,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1847143947, now seen corresponding path program 2 times [2021-12-14 11:31:04,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:31:04,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292535262] [2021-12-14 11:31:04,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:31:04,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:31:04,272 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:31:04,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201596788] [2021-12-14 11:31:04,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:31:04,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:31:04,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:31:04,279 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) [2021-12-14 11:31:04,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 11:31:04,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 11:31:04,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:31:04,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 11:31:04,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:31:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-14 11:31:04,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:31:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 11:31:04,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:31:04,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292535262] [2021-12-14 11:31:04,530 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:31:04,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201596788] [2021-12-14 11:31:04,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201596788] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:31:04,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:31:04,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-14 11:31:04,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809771106] [2021-12-14 11:31:04,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:31:04,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 11:31:04,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:31:04,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 11:31:04,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-14 11:31:04,534 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-14 11:31:04,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:31:04,673 INFO L93 Difference]: Finished difference Result 150 states and 186 transitions. [2021-12-14 11:31:04,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 11:31:04,673 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 48 [2021-12-14 11:31:04,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:31:04,674 INFO L225 Difference]: With dead ends: 150 [2021-12-14 11:31:04,674 INFO L226 Difference]: Without dead ends: 123 [2021-12-14 11:31:04,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-14 11:31:04,675 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 79 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:31:04,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 185 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:31:04,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-14 11:31:04,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 98. [2021-12-14 11:31:04,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 71 states have internal predecessors, (80), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-14 11:31:04,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 122 transitions. [2021-12-14 11:31:04,692 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 122 transitions. Word has length 48 [2021-12-14 11:31:04,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:31:04,693 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 122 transitions. [2021-12-14 11:31:04,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-14 11:31:04,695 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 122 transitions. [2021-12-14 11:31:04,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-14 11:31:04,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:31:04,697 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:31:04,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 11:31:04,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:31:04,907 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:31:04,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:31:04,908 INFO L85 PathProgramCache]: Analyzing trace with hash 741894005, now seen corresponding path program 3 times [2021-12-14 11:31:04,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:31:04,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998765108] [2021-12-14 11:31:04,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:31:04,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:31:04,923 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:31:04,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561185889] [2021-12-14 11:31:04,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 11:31:04,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:31:04,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:31:04,925 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) [2021-12-14 11:31:04,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 11:31:04,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-14 11:31:04,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:31:04,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-14 11:31:04,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:31:04,994 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 [2021-12-14 11:31:05,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:05,339 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-14 11:31:05,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-14 11:31:05,351 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 27 treesize of output 26 [2021-12-14 11:31:05,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 11:31:05,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 38 [2021-12-14 11:31:05,611 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-14 11:31:05,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:31:05,758 INFO L354 Elim1Store]: treesize reduction 20, result has 64.3 percent of original size [2021-12-14 11:31:05,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 110 treesize of output 111 [2021-12-14 11:31:05,783 INFO L354 Elim1Store]: treesize reduction 18, result has 59.1 percent of original size [2021-12-14 11:31:05,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 76 [2021-12-14 11:31:05,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 11:31:05,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 172 [2021-12-14 11:31:05,830 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 11:31:05,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 144 [2021-12-14 11:31:05,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 11:31:05,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 148 [2021-12-14 11:31:06,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:06,358 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 180 treesize of output 174 [2021-12-14 11:31:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-14 11:31:07,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:31:07,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998765108] [2021-12-14 11:31:07,651 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:31:07,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561185889] [2021-12-14 11:31:07,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561185889] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:31:07,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:31:07,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2021-12-14 11:31:07,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185999822] [2021-12-14 11:31:07,651 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:31:07,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-14 11:31:07,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:31:07,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-14 11:31:07,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-12-14 11:31:07,652 INFO L87 Difference]: Start difference. First operand 98 states and 122 transitions. Second operand has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-14 11:31:08,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:31:08,620 INFO L93 Difference]: Finished difference Result 136 states and 167 transitions. [2021-12-14 11:31:08,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-14 11:31:08,620 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 48 [2021-12-14 11:31:08,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:31:08,622 INFO L225 Difference]: With dead ends: 136 [2021-12-14 11:31:08,623 INFO L226 Difference]: Without dead ends: 132 [2021-12-14 11:31:08,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=420, Invalid=1650, Unknown=0, NotChecked=0, Total=2070 [2021-12-14 11:31:08,624 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 81 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 11:31:08,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 220 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 488 Invalid, 0 Unknown, 45 Unchecked, 0.4s Time] [2021-12-14 11:31:08,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-14 11:31:08,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2021-12-14 11:31:08,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 89 states have (on average 1.1123595505617978) internal successors, (99), 91 states have internal predecessors, (99), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-14 11:31:08,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 157 transitions. [2021-12-14 11:31:08,634 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 157 transitions. Word has length 48 [2021-12-14 11:31:08,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:31:08,634 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 157 transitions. [2021-12-14 11:31:08,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-14 11:31:08,634 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 157 transitions. [2021-12-14 11:31:08,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-14 11:31:08,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:31:08,635 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:31:08,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 11:31:08,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:31:08,851 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:31:08,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:31:08,851 INFO L85 PathProgramCache]: Analyzing trace with hash 48801527, now seen corresponding path program 4 times [2021-12-14 11:31:08,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:31:08,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648480589] [2021-12-14 11:31:08,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:31:08,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:31:08,865 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:31:08,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769117109] [2021-12-14 11:31:08,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 11:31:08,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:31:08,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:31:08,867 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) [2021-12-14 11:31:08,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 11:31:08,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 11:31:08,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:31:08,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-14 11:31:08,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:31:08,950 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 [2021-12-14 11:31:08,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:08,987 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-14 11:31:08,990 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 28 treesize of output 28 [2021-12-14 11:31:08,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-14 11:31:08,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-14 11:31:09,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:09,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:09,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-12-14 11:31:10,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:10,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:10,291 INFO L354 Elim1Store]: treesize reduction 84, result has 40.4 percent of original size [2021-12-14 11:31:10,292 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 4 case distinctions, treesize of input 72 treesize of output 91 [2021-12-14 11:31:10,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:10,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 11:31:10,706 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-12-14 11:31:10,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 94 treesize of output 52 [2021-12-14 11:31:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 11:31:10,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:31:12,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:31:12,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648480589] [2021-12-14 11:31:12,060 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:31:12,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769117109] [2021-12-14 11:31:12,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769117109] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:31:12,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-14 11:31:12,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-12-14 11:31:12,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345719592] [2021-12-14 11:31:12,061 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-14 11:31:12,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-14 11:31:12,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:31:12,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-14 11:31:12,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2021-12-14 11:31:12,062 INFO L87 Difference]: Start difference. First operand 126 states and 157 transitions. Second operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-14 11:31:12,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:31:12,625 INFO L93 Difference]: Finished difference Result 202 states and 253 transitions. [2021-12-14 11:31:12,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-14 11:31:12,625 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 50 [2021-12-14 11:31:12,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:31:12,627 INFO L225 Difference]: With dead ends: 202 [2021-12-14 11:31:12,627 INFO L226 Difference]: Without dead ends: 156 [2021-12-14 11:31:12,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2021-12-14 11:31:12,628 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 52 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 11:31:12,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 299 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 519 Invalid, 0 Unknown, 54 Unchecked, 0.4s Time] [2021-12-14 11:31:12,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-14 11:31:12,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 147. [2021-12-14 11:31:12,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 103 states have (on average 1.1067961165048543) internal successors, (114), 106 states have internal predecessors, (114), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-14 11:31:12,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 184 transitions. [2021-12-14 11:31:12,638 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 184 transitions. Word has length 50 [2021-12-14 11:31:12,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:31:12,638 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 184 transitions. [2021-12-14 11:31:12,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-14 11:31:12,639 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 184 transitions. [2021-12-14 11:31:12,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-14 11:31:12,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:31:12,639 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:31:12,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 11:31:12,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:31:12,847 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:31:12,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:31:12,848 INFO L85 PathProgramCache]: Analyzing trace with hash 986268537, now seen corresponding path program 5 times [2021-12-14 11:31:12,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:31:12,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301381951] [2021-12-14 11:31:12,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:31:12,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:31:12,870 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:31:12,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061464969] [2021-12-14 11:31:12,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 11:31:12,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:31:12,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:31:12,881 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:31:12,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 11:31:12,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-14 11:31:12,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:31:12,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 11:31:12,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:31:13,061 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-14 11:31:13,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:31:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 11:31:13,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:31:13,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301381951] [2021-12-14 11:31:13,143 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:31:13,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061464969] [2021-12-14 11:31:13,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061464969] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:31:13,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:31:13,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-14 11:31:13,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628203142] [2021-12-14 11:31:13,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:31:13,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 11:31:13,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:31:13,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 11:31:13,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-14 11:31:13,144 INFO L87 Difference]: Start difference. First operand 147 states and 184 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-14 11:31:13,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:31:13,525 INFO L93 Difference]: Finished difference Result 259 states and 324 transitions. [2021-12-14 11:31:13,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 11:31:13,525 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2021-12-14 11:31:13,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:31:13,526 INFO L225 Difference]: With dead ends: 259 [2021-12-14 11:31:13,526 INFO L226 Difference]: Without dead ends: 221 [2021-12-14 11:31:13,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-12-14 11:31:13,527 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 73 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 11:31:13,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 301 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 11:31:13,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-14 11:31:13,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 190. [2021-12-14 11:31:13,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 132 states have (on average 1.1136363636363635) internal successors, (147), 135 states have internal predecessors, (147), 47 states have call successors, (47), 10 states have call predecessors, (47), 10 states have return successors, (47), 44 states have call predecessors, (47), 47 states have call successors, (47) [2021-12-14 11:31:13,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 241 transitions. [2021-12-14 11:31:13,540 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 241 transitions. Word has length 52 [2021-12-14 11:31:13,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:31:13,540 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 241 transitions. [2021-12-14 11:31:13,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-14 11:31:13,541 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 241 transitions. [2021-12-14 11:31:13,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-14 11:31:13,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:31:13,541 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:31:13,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 11:31:13,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-14 11:31:13,755 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:31:13,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:31:13,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1330474501, now seen corresponding path program 6 times [2021-12-14 11:31:13,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:31:13,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930968872] [2021-12-14 11:31:13,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:31:13,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:31:13,792 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:31:13,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71724810] [2021-12-14 11:31:13,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 11:31:13,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:31:13,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:31:13,807 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:31:13,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 11:31:13,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-14 11:31:13,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:31:13,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-14 11:31:13,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:31:14,004 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 [2021-12-14 11:31:14,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:14,026 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-14 11:31:14,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-14 11:31:14,031 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 27 treesize of output 26 [2021-12-14 11:31:14,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:14,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:14,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-12-14 11:31:14,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:14,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:14,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:14,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:14,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:14,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:14,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2021-12-14 11:31:15,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:15,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:15,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:15,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:15,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:15,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:15,640 INFO L354 Elim1Store]: treesize reduction 172, result has 33.6 percent of original size [2021-12-14 11:31:15,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 101 treesize of output 130 [2021-12-14 11:31:17,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:17,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 11:31:17,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:17,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 11:31:17,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 4 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 136 treesize of output 136 [2021-12-14 11:31:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 11:31:17,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:31:23,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:31:23,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930968872] [2021-12-14 11:31:23,252 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:31:23,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71724810] [2021-12-14 11:31:23,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71724810] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:31:23,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-14 11:31:23,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-12-14 11:31:23,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766064600] [2021-12-14 11:31:23,253 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-14 11:31:23,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-14 11:31:23,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:31:23,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-14 11:31:23,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1556, Unknown=1, NotChecked=0, Total=1806 [2021-12-14 11:31:23,254 INFO L87 Difference]: Start difference. First operand 190 states and 241 transitions. Second operand has 26 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-14 11:31:23,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:31:23,813 INFO L93 Difference]: Finished difference Result 216 states and 269 transitions. [2021-12-14 11:31:23,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-14 11:31:23,820 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 54 [2021-12-14 11:31:23,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:31:23,821 INFO L225 Difference]: With dead ends: 216 [2021-12-14 11:31:23,821 INFO L226 Difference]: Without dead ends: 212 [2021-12-14 11:31:23,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=319, Invalid=2032, Unknown=1, NotChecked=0, Total=2352 [2021-12-14 11:31:23,823 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 56 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 683 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 11:31:23,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 412 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 320 Invalid, 0 Unknown, 683 Unchecked, 0.2s Time] [2021-12-14 11:31:23,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-14 11:31:23,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 197. [2021-12-14 11:31:23,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 138 states have (on average 1.108695652173913) internal successors, (153), 141 states have internal predecessors, (153), 47 states have call successors, (47), 11 states have call predecessors, (47), 11 states have return successors, (47), 44 states have call predecessors, (47), 47 states have call successors, (47) [2021-12-14 11:31:23,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 247 transitions. [2021-12-14 11:31:23,838 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 247 transitions. Word has length 54 [2021-12-14 11:31:23,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:31:23,839 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 247 transitions. [2021-12-14 11:31:23,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-14 11:31:23,839 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 247 transitions. [2021-12-14 11:31:23,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-14 11:31:23,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:31:23,841 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:31:23,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 11:31:24,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-14 11:31:24,051 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:31:24,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:31:24,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1367492605, now seen corresponding path program 7 times [2021-12-14 11:31:24,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:31:24,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803659319] [2021-12-14 11:31:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:31:24,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:31:24,062 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:31:24,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167126669] [2021-12-14 11:31:24,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 11:31:24,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:31:24,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:31:24,066 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:31:24,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 11:31:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:31:24,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 11:31:24,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:31:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-14 11:31:24,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:31:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 11:31:24,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:31:24,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803659319] [2021-12-14 11:31:24,340 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:31:24,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167126669] [2021-12-14 11:31:24,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167126669] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:31:24,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:31:24,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-12-14 11:31:24,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909130317] [2021-12-14 11:31:24,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:31:24,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 11:31:24,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:31:24,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 11:31:24,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-12-14 11:31:24,342 INFO L87 Difference]: Start difference. First operand 197 states and 247 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-14 11:31:24,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:31:24,880 INFO L93 Difference]: Finished difference Result 523 states and 666 transitions. [2021-12-14 11:31:24,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 11:31:24,889 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2021-12-14 11:31:24,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:31:24,890 INFO L225 Difference]: With dead ends: 523 [2021-12-14 11:31:24,891 INFO L226 Difference]: Without dead ends: 397 [2021-12-14 11:31:24,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-12-14 11:31:24,892 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 316 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 11:31:24,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 329 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 11:31:24,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-12-14 11:31:24,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 339. [2021-12-14 11:31:24,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 234 states have (on average 1.1196581196581197) internal successors, (262), 238 states have internal predecessors, (262), 89 states have call successors, (89), 15 states have call predecessors, (89), 15 states have return successors, (89), 85 states have call predecessors, (89), 89 states have call successors, (89) [2021-12-14 11:31:24,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 440 transitions. [2021-12-14 11:31:24,917 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 440 transitions. Word has length 56 [2021-12-14 11:31:24,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:31:24,917 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 440 transitions. [2021-12-14 11:31:24,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-14 11:31:24,918 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 440 transitions. [2021-12-14 11:31:24,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-14 11:31:24,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:31:24,919 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:31:24,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 11:31:25,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-14 11:31:25,131 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:31:25,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:31:25,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1248328447, now seen corresponding path program 8 times [2021-12-14 11:31:25,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:31:25,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883640306] [2021-12-14 11:31:25,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:31:25,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:31:25,142 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:31:25,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683444054] [2021-12-14 11:31:25,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:31:25,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:31:25,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:31:25,144 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:31:25,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 11:31:25,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 11:31:25,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:31:25,293 WARN L261 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-14 11:31:25,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:31:25,310 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 [2021-12-14 11:31:25,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:25,335 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-14 11:31:25,340 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 28 treesize of output 28 [2021-12-14 11:31:25,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-14 11:31:25,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-14 11:31:25,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:25,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:25,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2021-12-14 11:31:25,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:25,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:25,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:25,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:25,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:25,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:25,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2021-12-14 11:31:25,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:25,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:25,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:25,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:25,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:25,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:25,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:25,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:25,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:25,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:25,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:25,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:25,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 97 [2021-12-14 11:31:33,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:33,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:33,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:33,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:33,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:33,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:33,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:33,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:33,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:33,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:33,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:33,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:33,145 INFO L354 Elim1Store]: treesize reduction 180, result has 39.4 percent of original size [2021-12-14 11:31:33,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 108 treesize of output 163 [2021-12-14 11:31:34,852 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-12-14 11:31:34,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 252 treesize of output 120 [2021-12-14 11:31:34,933 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 11:31:34,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:31:37,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:31:37,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883640306] [2021-12-14 11:31:37,490 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:31:37,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683444054] [2021-12-14 11:31:37,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683444054] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:31:37,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-14 11:31:37,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-12-14 11:31:37,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241496331] [2021-12-14 11:31:37,490 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-14 11:31:37,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-14 11:31:37,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:31:37,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-14 11:31:37,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=2582, Unknown=6, NotChecked=0, Total=2862 [2021-12-14 11:31:37,492 INFO L87 Difference]: Start difference. First operand 339 states and 440 transitions. Second operand has 36 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-14 11:31:38,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:31:38,867 INFO L93 Difference]: Finished difference Result 390 states and 498 transitions. [2021-12-14 11:31:38,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-14 11:31:38,867 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 58 [2021-12-14 11:31:38,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:31:38,869 INFO L225 Difference]: With dead ends: 390 [2021-12-14 11:31:38,869 INFO L226 Difference]: Without dead ends: 386 [2021-12-14 11:31:38,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=329, Invalid=3087, Unknown=6, NotChecked=0, Total=3422 [2021-12-14 11:31:38,870 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 67 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:31:38,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 514 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1003 Invalid, 0 Unknown, 276 Unchecked, 1.0s Time] [2021-12-14 11:31:38,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-12-14 11:31:38,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 368. [2021-12-14 11:31:38,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 256 states have (on average 1.1171875) internal successors, (286), 260 states have internal predecessors, (286), 93 states have call successors, (93), 18 states have call predecessors, (93), 18 states have return successors, (93), 89 states have call predecessors, (93), 93 states have call successors, (93) [2021-12-14 11:31:38,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 472 transitions. [2021-12-14 11:31:38,891 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 472 transitions. Word has length 58 [2021-12-14 11:31:38,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:31:38,891 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 472 transitions. [2021-12-14 11:31:38,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-14 11:31:38,891 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 472 transitions. [2021-12-14 11:31:38,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-14 11:31:38,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:31:38,892 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:31:38,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 11:31:39,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-14 11:31:39,107 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:31:39,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:31:39,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1400995841, now seen corresponding path program 9 times [2021-12-14 11:31:39,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:31:39,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933645227] [2021-12-14 11:31:39,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:31:39,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:31:39,119 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:31:39,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183268051] [2021-12-14 11:31:39,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 11:31:39,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:31:39,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:31:39,123 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:31:39,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 11:31:39,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-14 11:31:39,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:31:39,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 11:31:39,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:31:39,425 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-14 11:31:39,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:31:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 11:31:39,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:31:39,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933645227] [2021-12-14 11:31:39,547 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:31:39,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183268051] [2021-12-14 11:31:39,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183268051] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:31:39,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:31:39,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-12-14 11:31:39,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497788251] [2021-12-14 11:31:39,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:31:39,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 11:31:39,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:31:39,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 11:31:39,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-12-14 11:31:39,548 INFO L87 Difference]: Start difference. First operand 368 states and 472 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-14 11:31:40,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:31:40,496 INFO L93 Difference]: Finished difference Result 865 states and 1119 transitions. [2021-12-14 11:31:40,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-14 11:31:40,499 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 60 [2021-12-14 11:31:40,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:31:40,510 INFO L225 Difference]: With dead ends: 865 [2021-12-14 11:31:40,510 INFO L226 Difference]: Without dead ends: 620 [2021-12-14 11:31:40,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-12-14 11:31:40,511 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 565 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 11:31:40,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [585 Valid, 362 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 11:31:40,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-12-14 11:31:40,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 481. [2021-12-14 11:31:40,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 329 states have (on average 1.1185410334346504) internal successors, (368), 334 states have internal predecessors, (368), 131 states have call successors, (131), 20 states have call predecessors, (131), 20 states have return successors, (131), 126 states have call predecessors, (131), 131 states have call successors, (131) [2021-12-14 11:31:40,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 630 transitions. [2021-12-14 11:31:40,539 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 630 transitions. Word has length 60 [2021-12-14 11:31:40,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:31:40,539 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 630 transitions. [2021-12-14 11:31:40,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-14 11:31:40,540 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 630 transitions. [2021-12-14 11:31:40,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-14 11:31:40,540 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:31:40,541 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:31:40,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-14 11:31:40,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-14 11:31:40,757 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:31:40,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:31:40,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1599277695, now seen corresponding path program 10 times [2021-12-14 11:31:40,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:31:40,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138772832] [2021-12-14 11:31:40,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:31:40,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:31:40,768 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:31:40,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420308486] [2021-12-14 11:31:40,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 11:31:40,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:31:40,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:31:40,769 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:31:40,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-14 11:31:40,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 11:31:40,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:31:40,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 11:31:40,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:31:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-14 11:31:41,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:31:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 11:31:41,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:31:41,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138772832] [2021-12-14 11:31:41,142 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:31:41,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420308486] [2021-12-14 11:31:41,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420308486] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:31:41,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:31:41,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-12-14 11:31:41,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137176349] [2021-12-14 11:31:41,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:31:41,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 11:31:41,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:31:41,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 11:31:41,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-12-14 11:31:41,143 INFO L87 Difference]: Start difference. First operand 481 states and 630 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-14 11:31:41,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:31:41,806 INFO L93 Difference]: Finished difference Result 535 states and 682 transitions. [2021-12-14 11:31:41,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 11:31:41,818 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 60 [2021-12-14 11:31:41,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:31:41,820 INFO L225 Difference]: With dead ends: 535 [2021-12-14 11:31:41,820 INFO L226 Difference]: Without dead ends: 531 [2021-12-14 11:31:41,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-12-14 11:31:41,821 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 147 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 11:31:41,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 587 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 11:31:41,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-12-14 11:31:41,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 482. [2021-12-14 11:31:41,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 330 states have (on average 1.1181818181818182) internal successors, (369), 335 states have internal predecessors, (369), 131 states have call successors, (131), 20 states have call predecessors, (131), 20 states have return successors, (131), 126 states have call predecessors, (131), 131 states have call successors, (131) [2021-12-14 11:31:41,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 631 transitions. [2021-12-14 11:31:41,877 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 631 transitions. Word has length 60 [2021-12-14 11:31:41,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:31:41,877 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 631 transitions. [2021-12-14 11:31:41,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-14 11:31:41,878 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 631 transitions. [2021-12-14 11:31:41,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-14 11:31:41,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:31:41,880 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:31:41,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-14 11:31:42,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-14 11:31:42,087 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:31:42,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:31:42,087 INFO L85 PathProgramCache]: Analyzing trace with hash 745660931, now seen corresponding path program 11 times [2021-12-14 11:31:42,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:31:42,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434028921] [2021-12-14 11:31:42,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:31:42,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:31:42,099 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:31:42,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952748762] [2021-12-14 11:31:42,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 11:31:42,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:31:42,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:31:42,100 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:31:42,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-14 11:31:42,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-14 11:31:42,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:31:42,360 WARN L261 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 124 conjunts are in the unsatisfiable core [2021-12-14 11:31:42,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:31:42,379 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 18 treesize of output 16 [2021-12-14 11:31:42,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,404 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-14 11:31:42,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-14 11:31:42,422 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 27 treesize of output 26 [2021-12-14 11:31:42,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2021-12-14 11:31:42,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,551 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 55 [2021-12-14 11:31:42,554 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 44 treesize of output 40 [2021-12-14 11:31:42,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 34 [2021-12-14 11:31:42,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 34 [2021-12-14 11:31:42,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 91 [2021-12-14 11:31:42,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:42,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 115 [2021-12-14 11:31:52,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:52,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:52,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:52,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:52,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:52,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:52,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:52,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:52,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:52,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:52,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:52,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:52,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:52,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:52,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:52,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:52,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:52,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:52,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:52,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:31:53,088 INFO L354 Elim1Store]: treesize reduction 228, result has 39.2 percent of original size [2021-12-14 11:31:53,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 22 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 126 treesize of output 199 [2021-12-14 11:31:56,242 INFO L354 Elim1Store]: treesize reduction 37, result has 9.8 percent of original size [2021-12-14 11:31:56,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 354 treesize of output 166 [2021-12-14 11:31:56,347 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 23 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 11:31:56,347 INFO L328 TraceCheckSpWp]: Computing backward predicates...