./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s2lif.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/s2lif.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 b94168e93e7008f2fa8921a5a8a54bdf1fdce85df40220d4719fdc5076df164f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 02:06:57,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 02:06:57,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 02:06:57,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 02:06:57,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 02:06:57,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 02:06:57,858 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 02:06:57,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 02:06:57,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 02:06:57,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 02:06:57,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 02:06:57,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 02:06:57,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 02:06:57,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 02:06:57,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 02:06:57,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 02:06:57,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 02:06:57,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 02:06:57,867 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 02:06:57,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 02:06:57,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 02:06:57,875 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 02:06:57,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 02:06:57,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 02:06:57,879 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 02:06:57,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 02:06:57,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 02:06:57,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 02:06:57,885 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 02:06:57,886 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 02:06:57,886 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 02:06:57,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 02:06:57,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 02:06:57,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 02:06:57,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 02:06:57,890 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 02:06:57,891 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 02:06:57,891 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 02:06:57,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 02:06:57,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 02:06:57,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 02:06:57,893 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 02:06:57,912 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 02:06:57,912 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 02:06:57,912 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 02:06:57,913 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 02:06:57,913 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 02:06:57,913 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 02:06:57,914 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 02:06:57,914 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 02:06:57,914 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 02:06:57,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 02:06:57,915 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 02:06:57,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 02:06:57,915 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 02:06:57,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 02:06:57,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 02:06:57,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 02:06:57,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 02:06:57,916 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 02:06:57,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 02:06:57,916 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 02:06:57,916 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 02:06:57,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 02:06:57,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 02:06:57,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 02:06:57,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 02:06:57,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 02:06:57,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 02:06:57,918 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 02:06:57,918 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 02:06:57,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 02:06:57,918 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 02:06:57,918 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 02:06:57,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 02:06:57,919 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 02:06:57,919 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b94168e93e7008f2fa8921a5a8a54bdf1fdce85df40220d4719fdc5076df164f [2021-12-17 02:06:58,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 02:06:58,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 02:06:58,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 02:06:58,089 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 02:06:58,089 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 02:06:58,090 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s2lif.c [2021-12-17 02:06:58,143 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d377b71f/aeda496a2fe54d8fb9b5f9cec5247579/FLAG0390f553c [2021-12-17 02:06:58,464 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 02:06:58,464 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2lif.c [2021-12-17 02:06:58,468 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d377b71f/aeda496a2fe54d8fb9b5f9cec5247579/FLAG0390f553c [2021-12-17 02:06:58,477 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d377b71f/aeda496a2fe54d8fb9b5f9cec5247579 [2021-12-17 02:06:58,479 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 02:06:58,480 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 02:06:58,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 02:06:58,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 02:06:58,486 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 02:06:58,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:06:58" (1/1) ... [2021-12-17 02:06:58,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bf20382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:06:58, skipping insertion in model container [2021-12-17 02:06:58,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:06:58" (1/1) ... [2021-12-17 02:06:58,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 02:06:58,500 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 02:06:58,617 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2lif.c[588,601] [2021-12-17 02:06:58,636 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 02:06:58,641 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 02:06:58,649 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2lif.c[588,601] [2021-12-17 02:06:58,654 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 02:06:58,665 INFO L208 MainTranslator]: Completed translation [2021-12-17 02:06:58,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:06:58 WrapperNode [2021-12-17 02:06:58,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 02:06:58,667 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 02:06:58,667 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 02:06:58,667 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 02:06:58,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:06:58" (1/1) ... [2021-12-17 02:06:58,685 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:06:58" (1/1) ... [2021-12-17 02:06:58,705 INFO L137 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 81 [2021-12-17 02:06:58,706 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 02:06:58,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 02:06:58,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 02:06:58,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 02:06:58,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:06:58" (1/1) ... [2021-12-17 02:06:58,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:06:58" (1/1) ... [2021-12-17 02:06:58,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:06:58" (1/1) ... [2021-12-17 02:06:58,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:06:58" (1/1) ... [2021-12-17 02:06:58,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:06:58" (1/1) ... [2021-12-17 02:06:58,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:06:58" (1/1) ... [2021-12-17 02:06:58,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:06:58" (1/1) ... [2021-12-17 02:06:58,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 02:06:58,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 02:06:58,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 02:06:58,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 02:06:58,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:06:58" (1/1) ... [2021-12-17 02:06:58,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 02:06:58,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:06:58,774 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) [2021-12-17 02:06:58,784 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 [2021-12-17 02:06:58,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 02:06:58,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 02:06:58,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 02:06:58,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 02:06:58,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 02:06:58,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 02:06:58,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 02:06:58,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 02:06:58,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 02:06:58,860 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 02:06:58,861 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 02:06:58,984 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 02:06:58,991 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 02:06:58,991 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 02:06:58,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:06:58 BoogieIcfgContainer [2021-12-17 02:06:58,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 02:06:58,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 02:06:58,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 02:06:58,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 02:06:58,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 02:06:58" (1/3) ... [2021-12-17 02:06:58,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4632a0ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:06:58, skipping insertion in model container [2021-12-17 02:06:58,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:06:58" (2/3) ... [2021-12-17 02:06:58,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4632a0ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:06:58, skipping insertion in model container [2021-12-17 02:06:58,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:06:58" (3/3) ... [2021-12-17 02:06:59,000 INFO L111 eAbstractionObserver]: Analyzing ICFG s2lif.c [2021-12-17 02:06:59,005 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 02:06:59,005 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 02:06:59,033 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 02:06:59,038 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 [2021-12-17 02:06:59,038 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 02:06:59,048 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:06:59,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-17 02:06:59,053 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:06:59,054 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:06:59,054 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:06:59,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:06:59,057 INFO L85 PathProgramCache]: Analyzing trace with hash -845640729, now seen corresponding path program 1 times [2021-12-17 02:06:59,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:06:59,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542902479] [2021-12-17 02:06:59,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:06:59,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:06:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:06:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:06:59,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:06:59,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542902479] [2021-12-17 02:06:59,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542902479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:06:59,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:06:59,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 02:06:59,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027982915] [2021-12-17 02:06:59,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:06:59,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 02:06:59,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:06:59,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 02:06:59,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 02:06:59,217 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:06:59,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:06:59,227 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2021-12-17 02:06:59,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 02:06:59,229 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-17 02:06:59,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:06:59,233 INFO L225 Difference]: With dead ends: 40 [2021-12-17 02:06:59,233 INFO L226 Difference]: Without dead ends: 18 [2021-12-17 02:06:59,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 02:06:59,238 INFO L933 BasicCegarLoop]: 26 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, 26 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 [2021-12-17 02:06:59,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:06:59,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-17 02:06:59,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-17 02:06:59,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:06:59,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-12-17 02:06:59,259 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2021-12-17 02:06:59,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:06:59,259 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-12-17 02:06:59,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:06:59,259 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-12-17 02:06:59,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-17 02:06:59,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:06:59,260 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:06:59,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 02:06:59,260 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:06:59,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:06:59,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1238667739, now seen corresponding path program 1 times [2021-12-17 02:06:59,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:06:59,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289755398] [2021-12-17 02:06:59,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:06:59,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:06:59,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:06:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:06:59,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:06:59,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289755398] [2021-12-17 02:06:59,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289755398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:06:59,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:06:59,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:06:59,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404461199] [2021-12-17 02:06:59,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:06:59,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:06:59,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:06:59,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:06:59,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:06:59,368 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:06:59,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:06:59,422 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-12-17 02:06:59,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 02:06:59,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-17 02:06:59,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:06:59,424 INFO L225 Difference]: With dead ends: 36 [2021-12-17 02:06:59,424 INFO L226 Difference]: Without dead ends: 25 [2021-12-17 02:06:59,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:06:59,428 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:06:59,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 11 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:06:59,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-17 02:06:59,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-12-17 02:06:59,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:06:59,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-12-17 02:06:59,438 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2021-12-17 02:06:59,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:06:59,439 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-12-17 02:06:59,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:06:59,442 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-12-17 02:06:59,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-17 02:06:59,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:06:59,444 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:06:59,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 02:06:59,444 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:06:59,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:06:59,445 INFO L85 PathProgramCache]: Analyzing trace with hash 2001188913, now seen corresponding path program 1 times [2021-12-17 02:06:59,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:06:59,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425227424] [2021-12-17 02:06:59,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:06:59,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:06:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:06:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:06:59,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:06:59,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425227424] [2021-12-17 02:06:59,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425227424] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:06:59,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397335662] [2021-12-17 02:06:59,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:06:59,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:06:59,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:06:59,895 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) [2021-12-17 02:06:59,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 02:06:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:06:59,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-17 02:06:59,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:07:00,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 02:07:00,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:07:00,059 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 14 treesize of output 16 [2021-12-17 02:07:00,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:07:00,246 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 32 treesize of output 23 [2021-12-17 02:07:00,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:07:00,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-12-17 02:07:00,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:07:00,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 27 [2021-12-17 02:07:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:07:00,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:07:00,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 02:07:00,802 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 56 treesize of output 44 [2021-12-17 02:07:00,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 02:07:00,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 42 [2021-12-17 02:07:00,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:07:00,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2021-12-17 02:07:00,899 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 22 treesize of output 16 [2021-12-17 02:07:00,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:07:00,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397335662] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:07:00,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 02:07:00,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 30 [2021-12-17 02:07:00,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785958714] [2021-12-17 02:07:00,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 02:07:00,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-17 02:07:00,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:07:00,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-17 02:07:00,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2021-12-17 02:07:00,910 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:07:01,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:07:01,178 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-12-17 02:07:01,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 02:07:01,179 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-17 02:07:01,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:07:01,180 INFO L225 Difference]: With dead ends: 44 [2021-12-17 02:07:01,180 INFO L226 Difference]: Without dead ends: 39 [2021-12-17 02:07:01,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=241, Invalid=949, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 02:07:01,182 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:07:01,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 55 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 95 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2021-12-17 02:07:01,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-17 02:07:01,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2021-12-17 02:07:01,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:07:01,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-12-17 02:07:01,186 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 20 [2021-12-17 02:07:01,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:07:01,187 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-12-17 02:07:01,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:07:01,187 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-12-17 02:07:01,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-17 02:07:01,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:07:01,190 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:07:01,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 02:07:01,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:07:01,400 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:07:01,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:07:01,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1608161903, now seen corresponding path program 1 times [2021-12-17 02:07:01,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:07:01,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497423134] [2021-12-17 02:07:01,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:07:01,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:07:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:07:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 02:07:01,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:07:01,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497423134] [2021-12-17 02:07:01,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497423134] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:07:01,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228807066] [2021-12-17 02:07:01,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:07:01,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:07:01,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:07:01,506 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) [2021-12-17 02:07:01,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 02:07:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:07:01,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-17 02:07:01,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:07:01,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-17 02:07:01,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-17 02:07:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 02:07:01,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:07:01,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-12-17 02:07:01,655 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 22 treesize of output 20 [2021-12-17 02:07:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 02:07:01,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228807066] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:07:01,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 02:07:01,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-17 02:07:01,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100869337] [2021-12-17 02:07:01,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 02:07:01,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 02:07:01,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:07:01,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 02:07:01,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:07:01,671 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:07:01,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:07:01,742 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2021-12-17 02:07:01,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 02:07:01,742 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-17 02:07:01,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:07:01,744 INFO L225 Difference]: With dead ends: 49 [2021-12-17 02:07:01,744 INFO L226 Difference]: Without dead ends: 38 [2021-12-17 02:07:01,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-12-17 02:07:01,747 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:07:01,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 66 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:07:01,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-17 02:07:01,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-12-17 02:07:01,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:07:01,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-12-17 02:07:01,761 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 20 [2021-12-17 02:07:01,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:07:01,762 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-12-17 02:07:01,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:07:01,763 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-12-17 02:07:01,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-17 02:07:01,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:07:01,763 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:07:01,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 02:07:01,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-17 02:07:01,979 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:07:01,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:07:01,980 INFO L85 PathProgramCache]: Analyzing trace with hash -949569453, now seen corresponding path program 2 times [2021-12-17 02:07:01,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:07:01,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352580235] [2021-12-17 02:07:01,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:07:01,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:07:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:07:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 02:07:02,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:07:02,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352580235] [2021-12-17 02:07:02,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352580235] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:07:02,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901018559] [2021-12-17 02:07:02,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 02:07:02,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:07:02,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:07:02,029 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) [2021-12-17 02:07:02,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 02:07:02,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 02:07:02,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:07:02,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 02:07:02,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:07:02,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 02:07:02,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:07:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 02:07:02,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901018559] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:07:02,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 02:07:02,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-17 02:07:02,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258559836] [2021-12-17 02:07:02,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 02:07:02,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 02:07:02,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:07:02,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 02:07:02,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-17 02:07:02,164 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:07:02,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:07:02,252 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2021-12-17 02:07:02,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:07:02,253 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-17 02:07:02,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:07:02,253 INFO L225 Difference]: With dead ends: 70 [2021-12-17 02:07:02,253 INFO L226 Difference]: Without dead ends: 44 [2021-12-17 02:07:02,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-17 02:07:02,254 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 58 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:07:02,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 31 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:07:02,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-17 02:07:02,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2021-12-17 02:07:02,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:07:02,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-12-17 02:07:02,258 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2021-12-17 02:07:02,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:07:02,258 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-12-17 02:07:02,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:07:02,259 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-12-17 02:07:02,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-17 02:07:02,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:07:02,259 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:07:02,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 02:07:02,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:07:02,476 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:07:02,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:07:02,476 INFO L85 PathProgramCache]: Analyzing trace with hash -2105967953, now seen corresponding path program 3 times [2021-12-17 02:07:02,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:07:02,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234161003] [2021-12-17 02:07:02,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:07:02,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:07:02,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:07:02,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 02:07:02,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:07:02,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234161003] [2021-12-17 02:07:02,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234161003] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:07:02,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418372764] [2021-12-17 02:07:02,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 02:07:02,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:07:02,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:07:02,529 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) [2021-12-17 02:07:02,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 02:07:02,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 02:07:02,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:07:02,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 02:07:02,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:07:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 02:07:02,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:07:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 02:07:02,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418372764] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:07:02,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 02:07:02,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-17 02:07:02,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603242821] [2021-12-17 02:07:02,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 02:07:02,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 02:07:02,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:07:02,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 02:07:02,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-17 02:07:02,711 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:07:02,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:07:02,790 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-12-17 02:07:02,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:07:02,790 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-17 02:07:02,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:07:02,790 INFO L225 Difference]: With dead ends: 39 [2021-12-17 02:07:02,791 INFO L226 Difference]: Without dead ends: 31 [2021-12-17 02:07:02,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-12-17 02:07:02,791 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 59 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:07:02,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 21 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:07:02,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-17 02:07:02,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-12-17 02:07:02,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:07:02,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-12-17 02:07:02,797 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 22 [2021-12-17 02:07:02,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:07:02,797 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-12-17 02:07:02,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:07:02,797 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-12-17 02:07:02,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 02:07:02,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:07:02,798 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:07:02,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-17 02:07:03,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:07:03,015 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:07:03,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:07:03,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1032594067, now seen corresponding path program 4 times [2021-12-17 02:07:03,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:07:03,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841998055] [2021-12-17 02:07:03,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:07:03,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:07:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:07:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:07:03,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:07:03,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841998055] [2021-12-17 02:07:03,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841998055] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:07:03,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461108671] [2021-12-17 02:07:03,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 02:07:03,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:07:03,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:07:03,600 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) [2021-12-17 02:07:03,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 02:07:03,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 02:07:03,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:07:03,643 WARN L261 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-17 02:07:03,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:07:03,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 02:07:03,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:07:03,692 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 14 treesize of output 16 [2021-12-17 02:07:03,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:07:03,730 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 14 treesize of output 16 [2021-12-17 02:07:03,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:07:03,902 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 27 [2021-12-17 02:07:04,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:07:04,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:07:04,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-12-17 02:07:04,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:07:04,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:07:04,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:07:04,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-12-17 02:07:04,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:07:04,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-12-17 02:07:04,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:07:04,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 32 [2021-12-17 02:07:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:07:04,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:07:05,305 INFO L354 Elim1Store]: treesize reduction 52, result has 41.6 percent of original size [2021-12-17 02:07:05,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 1074 treesize of output 518 [2021-12-17 02:07:05,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:07:05,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-12-17 02:07:05,998 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_4 (Array Int Int))) (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (or (not (= 3 (select v_arrayElimArr_4 .cse0))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_4))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse3 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (.cse2 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 3))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) (and (<= (div (+ (* .cse1 (- 1)) (* .cse2 (- 1)) (- 3)) (- 3)) .cse3) (<= .cse3 (div (+ .cse1 .cse2 3) 3))))))) (not (= (select v_arrayElimArr_4 |c_ULTIMATE.start_main_~a~0#1.offset|) 3))))) is different from false [2021-12-17 02:07:06,046 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_4 (Array Int Int))) (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (or (not (= 3 (select v_arrayElimArr_4 .cse0))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_4))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse2 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse3 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 3))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0)) (.cse1 (+ |c_ULTIMATE.start_main_~i~0#1| 2))) (and (<= .cse1 (div (+ .cse2 .cse3 3) 3)) (<= (div (+ (* .cse2 (- 1)) (* .cse3 (- 1)) (- 3)) (- 3)) .cse1)))))) (not (= (select v_arrayElimArr_4 |c_ULTIMATE.start_main_~a~0#1.offset|) 3))))) is different from false [2021-12-17 02:07:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-17 02:07:06,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461108671] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:07:06,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 02:07:06,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 50 [2021-12-17 02:07:06,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153458985] [2021-12-17 02:07:06,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 02:07:06,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-17 02:07:06,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:07:06,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-17 02:07:06,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1942, Unknown=2, NotChecked=186, Total=2450 [2021-12-17 02:07:06,107 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 50 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:07:13,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:07:13,962 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2021-12-17 02:07:13,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-17 02:07:13,963 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-17 02:07:13,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:07:13,963 INFO L225 Difference]: With dead ends: 77 [2021-12-17 02:07:13,963 INFO L226 Difference]: Without dead ends: 72 [2021-12-17 02:07:13,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=791, Invalid=4326, Unknown=3, NotChecked=282, Total=5402 [2021-12-17 02:07:13,965 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 62 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:07:13,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 115 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 703 Invalid, 0 Unknown, 94 Unchecked, 1.3s Time] [2021-12-17 02:07:13,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-17 02:07:13,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 44. [2021-12-17 02:07:13,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:07:13,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-12-17 02:07:13,976 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 27 [2021-12-17 02:07:13,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:07:13,976 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-12-17 02:07:13,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:07:13,977 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-12-17 02:07:13,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 02:07:13,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:07:13,978 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:07:13,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 02:07:14,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:07:14,194 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:07:14,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:07:14,195 INFO L85 PathProgramCache]: Analyzing trace with hash -774428629, now seen corresponding path program 1 times [2021-12-17 02:07:14,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:07:14,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579498332] [2021-12-17 02:07:14,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:07:14,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:07:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:07:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 02:07:14,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:07:14,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579498332] [2021-12-17 02:07:14,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579498332] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:07:14,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745399209] [2021-12-17 02:07:14,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:07:14,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:07:14,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:07:14,484 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) [2021-12-17 02:07:14,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 02:07:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:07:14,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-17 02:07:14,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:07:14,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 02:07:14,678 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 02:07:14,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 02:07:14,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-17 02:07:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 02:07:14,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:07:14,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-17 02:07:14,952 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 28 treesize of output 24 [2021-12-17 02:07:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 02:07:14,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745399209] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:07:14,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 02:07:14,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 18 [2021-12-17 02:07:14,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188041413] [2021-12-17 02:07:14,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 02:07:14,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 02:07:14,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:07:14,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 02:07:14,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-12-17 02:07:14,984 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:07:15,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:07:15,591 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2021-12-17 02:07:15,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 02:07:15,592 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-17 02:07:15,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:07:15,592 INFO L225 Difference]: With dead ends: 63 [2021-12-17 02:07:15,592 INFO L226 Difference]: Without dead ends: 50 [2021-12-17 02:07:15,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-12-17 02:07:15,593 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 02:07:15,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 67 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 02:07:15,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-17 02:07:15,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2021-12-17 02:07:15,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:07:15,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-12-17 02:07:15,596 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 27 [2021-12-17 02:07:15,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:07:15,596 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-12-17 02:07:15,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:07:15,597 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-12-17 02:07:15,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 02:07:15,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:07:15,597 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:07:15,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 02:07:15,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:07:15,799 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:07:15,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:07:15,800 INFO L85 PathProgramCache]: Analyzing trace with hash -132219249, now seen corresponding path program 5 times [2021-12-17 02:07:15,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:07:15,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306372241] [2021-12-17 02:07:15,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:07:15,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:07:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:07:15,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 02:07:15,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:07:15,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306372241] [2021-12-17 02:07:15,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306372241] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:07:15,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425283790] [2021-12-17 02:07:15,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 02:07:15,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:07:15,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:07:15,916 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) [2021-12-17 02:07:15,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 02:07:15,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-17 02:07:15,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:07:15,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 02:07:15,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:07:16,165 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 02:07:16,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:07:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 02:07:16,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425283790] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:07:16,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 02:07:16,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-17 02:07:16,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005838285] [2021-12-17 02:07:16,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 02:07:16,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 02:07:16,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:07:16,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 02:07:16,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-17 02:07:16,273 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:07:16,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:07:16,527 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2021-12-17 02:07:16,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 02:07:16,527 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-17 02:07:16,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:07:16,528 INFO L225 Difference]: With dead ends: 77 [2021-12-17 02:07:16,528 INFO L226 Difference]: Without dead ends: 43 [2021-12-17 02:07:16,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-17 02:07:16,529 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 65 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:07:16,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 28 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:07:16,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-17 02:07:16,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2021-12-17 02:07:16,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:07:16,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-12-17 02:07:16,532 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2021-12-17 02:07:16,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:07:16,532 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-12-17 02:07:16,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:07:16,532 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-12-17 02:07:16,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-17 02:07:16,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:07:16,533 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:07:16,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-17 02:07:16,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:07:16,744 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:07:16,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:07:16,744 INFO L85 PathProgramCache]: Analyzing trace with hash -863925553, now seen corresponding path program 6 times [2021-12-17 02:07:16,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:07:16,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7994517] [2021-12-17 02:07:16,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:07:16,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:07:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:07:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 02:07:16,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:07:16,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7994517] [2021-12-17 02:07:16,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7994517] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:07:16,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005153935] [2021-12-17 02:07:16,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 02:07:16,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:07:16,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:07:16,894 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) [2021-12-17 02:07:16,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 02:07:16,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-17 02:07:16,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:07:16,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 02:07:16,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:07:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 02:07:17,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:07:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 02:07:17,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005153935] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:07:17,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 02:07:17,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-17 02:07:17,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145727428] [2021-12-17 02:07:17,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 02:07:17,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 02:07:17,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:07:17,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 02:07:17,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-17 02:07:17,262 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:07:17,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:07:17,547 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-12-17 02:07:17,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 02:07:17,547 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-17 02:07:17,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:07:17,547 INFO L225 Difference]: With dead ends: 42 [2021-12-17 02:07:17,547 INFO L226 Difference]: Without dead ends: 38 [2021-12-17 02:07:17,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-12-17 02:07:17,548 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 65 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:07:17,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 21 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:07:17,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-17 02:07:17,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-12-17 02:07:17,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:07:17,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-12-17 02:07:17,551 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 32 [2021-12-17 02:07:17,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:07:17,551 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-12-17 02:07:17,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:07:17,551 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-12-17 02:07:17,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 02:07:17,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:07:17,552 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:07:17,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 02:07:17,763 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,SelfDestructingSolverStorable9 [2021-12-17 02:07:17,764 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:07:17,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:07:17,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1250534543, now seen corresponding path program 7 times [2021-12-17 02:07:17,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:07:17,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216040984] [2021-12-17 02:07:17,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:07:17,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:07:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:07:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:07:19,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:07:19,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216040984] [2021-12-17 02:07:19,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216040984] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:07:19,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119566746] [2021-12-17 02:07:19,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 02:07:19,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:07:19,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:07:19,921 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) [2021-12-17 02:07:19,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 02:07:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:07:19,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-17 02:07:19,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:07:19,992 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 [2021-12-17 02:07:20,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 02:07:20,022 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 14 treesize of output 16 [2021-12-17 02:07:20,068 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 14 treesize of output 16 [2021-12-17 02:07:20,181 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 14 treesize of output 16 [2021-12-17 02:07:20,639 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 27 [2021-12-17 02:07:20,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:07:20,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 37 [2021-12-17 02:07:21,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:07:21,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:07:21,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:07:21,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2021-12-17 02:07:21,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:07:21,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:07:21,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:07:21,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:07:21,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-12-17 02:07:21,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:07:21,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:07:21,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:07:21,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:07:21,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:07:21,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 49 [2021-12-17 02:07:22,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 43 [2021-12-17 02:07:22,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 33 [2021-12-17 02:07:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:07:22,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:07:27,054 INFO L354 Elim1Store]: treesize reduction 476, result has 26.2 percent of original size [2021-12-17 02:07:27,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 6 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 9 new quantified variables, introduced 39 case distinctions, treesize of input 36240 treesize of output 11096 [2021-12-17 02:07:27,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:07:27,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:07:27,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:07:27,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-12-17 02:07:27,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:07:27,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:07:27,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:07:27,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-12-17 02:07:27,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:07:27,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:07:27,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:07:27,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-12-17 02:07:27,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:07:27,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:07:27,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:07:27,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 211 [2021-12-17 02:07:27,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:07:27,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:07:27,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:07:27,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 59 [2021-12-17 02:07:27,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:07:27,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:07:27,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:07:27,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 300 treesize of output 246 [2021-12-17 02:07:30,679 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_6 (Array Int Int)) (~N~0 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse3 (select v_arrayElimArr_6 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse8 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8))) (or (not (= 3 (select v_arrayElimArr_6 .cse0))) (let ((.cse2 (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_6))) (let ((.cse7 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse5 (select .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse4 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) (+ .cse3 .cse4 .cse5 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse4 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8))))))) (.cse1 (* 3 ~N~0))) (and (<= .cse1 .cse2) (<= .cse2 .cse1))) (<= ~N~0 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (< (+ |c_ULTIMATE.start_main_~i~0#1| 2) ~N~0) (not (= 3 .cse3)) (not (= 3 (select v_arrayElimArr_6 .cse8)))))) is different from false [2021-12-17 02:07:31,342 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_6 (Array Int Int)) (~N~0 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse3 (select v_arrayElimArr_6 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse8 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8))) (or (not (= 3 (select v_arrayElimArr_6 .cse0))) (let ((.cse2 (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_6))) (let ((.cse7 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse5 (select .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse4 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) (+ .cse3 .cse4 .cse5 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse4 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8))))))) (.cse1 (* 3 ~N~0))) (and (<= .cse1 .cse2) (<= .cse2 .cse1))) (<= ~N~0 (+ |c_ULTIMATE.start_main_~i~0#1| 2)) (< (+ |c_ULTIMATE.start_main_~i~0#1| 3) ~N~0) (not (= 3 .cse3)) (not (= 3 (select v_arrayElimArr_6 .cse8)))))) is different from false [2021-12-17 02:07:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2021-12-17 02:07:31,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119566746] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:07:31,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 02:07:31,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 66 [2021-12-17 02:07:31,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303647660] [2021-12-17 02:07:31,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 02:07:31,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-17 02:07:31,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:07:31,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-17 02:07:31,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=3523, Unknown=50, NotChecked=250, Total=4290 [2021-12-17 02:07:31,704 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 66 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 66 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:08:26,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:08:26,399 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2021-12-17 02:08:26,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-17 02:08:26,399 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 66 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-17 02:08:26,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:08:26,400 INFO L225 Difference]: With dead ends: 98 [2021-12-17 02:08:26,400 INFO L226 Difference]: Without dead ends: 80 [2021-12-17 02:08:26,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 103 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3258 ImplicationChecksByTransitivity, 61.1s TimeCoverageRelationStatistics Valid=1321, Invalid=9123, Unknown=70, NotChecked=406, Total=10920 [2021-12-17 02:08:26,402 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 86 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 02:08:26,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 131 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 964 Invalid, 0 Unknown, 159 Unchecked, 2.4s Time] [2021-12-17 02:08:26,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-17 02:08:26,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 55. [2021-12-17 02:08:26,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:08:26,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-12-17 02:08:26,407 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 34 [2021-12-17 02:08:26,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:08:26,408 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-12-17 02:08:26,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 66 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:08:26,408 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-12-17 02:08:26,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 02:08:26,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:08:26,408 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:08:26,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 02:08:26,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:08:26,609 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:08:26,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:08:26,609 INFO L85 PathProgramCache]: Analyzing trace with hash 2033315503, now seen corresponding path program 2 times [2021-12-17 02:08:26,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:08:26,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914377031] [2021-12-17 02:08:26,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:08:26,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:08:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:08:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 02:08:26,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:08:26,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914377031] [2021-12-17 02:08:26,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914377031] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:08:26,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123526880] [2021-12-17 02:08:26,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 02:08:26,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:08:26,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:08:26,852 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) [2021-12-17 02:08:26,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 02:08:26,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 02:08:26,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:08:26,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-17 02:08:26,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:08:27,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 02:08:27,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:27,186 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 25 treesize of output 24 [2021-12-17 02:08:27,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:27,262 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 25 treesize of output 24 [2021-12-17 02:08:27,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-17 02:08:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 02:08:27,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:08:27,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-17 02:08:27,576 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 28 treesize of output 24 [2021-12-17 02:08:27,622 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 02:08:27,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123526880] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:08:27,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 02:08:27,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 19 [2021-12-17 02:08:27,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803197396] [2021-12-17 02:08:27,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 02:08:27,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 02:08:27,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:08:27,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 02:08:27,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-12-17 02:08:27,624 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:08:28,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:08:28,085 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-12-17 02:08:28,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 02:08:28,086 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-17 02:08:28,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:08:28,086 INFO L225 Difference]: With dead ends: 76 [2021-12-17 02:08:28,086 INFO L226 Difference]: Without dead ends: 61 [2021-12-17 02:08:28,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-12-17 02:08:28,087 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 02:08:28,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 70 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 02:08:28,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-17 02:08:28,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-12-17 02:08:28,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:08:28,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-12-17 02:08:28,092 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 34 [2021-12-17 02:08:28,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:08:28,093 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-12-17 02:08:28,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:08:28,093 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-12-17 02:08:28,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-17 02:08:28,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:08:28,093 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:08:28,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 02:08:28,303 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,SelfDestructingSolverStorable11 [2021-12-17 02:08:28,303 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:08:28,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:08:28,304 INFO L85 PathProgramCache]: Analyzing trace with hash 880380819, now seen corresponding path program 8 times [2021-12-17 02:08:28,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:08:28,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650652941] [2021-12-17 02:08:28,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:08:28,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:08:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:08:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 02:08:28,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:08:28,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650652941] [2021-12-17 02:08:28,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650652941] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:08:28,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061702808] [2021-12-17 02:08:28,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 02:08:28,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:08:28,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:08:28,474 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) [2021-12-17 02:08:28,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 02:08:28,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 02:08:28,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:08:28,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 02:08:28,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:08:28,787 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 02:08:28,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:08:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 02:08:28,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061702808] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:08:28,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 02:08:28,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-17 02:08:28,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169248842] [2021-12-17 02:08:28,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 02:08:28,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 02:08:28,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:08:28,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 02:08:28,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-17 02:08:28,913 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:08:29,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:08:29,329 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2021-12-17 02:08:29,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 02:08:29,330 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-17 02:08:29,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:08:29,330 INFO L225 Difference]: With dead ends: 86 [2021-12-17 02:08:29,330 INFO L226 Difference]: Without dead ends: 50 [2021-12-17 02:08:29,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-12-17 02:08:29,331 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 78 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:08:29,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 45 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 02:08:29,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-17 02:08:29,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2021-12-17 02:08:29,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:08:29,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-12-17 02:08:29,334 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 36 [2021-12-17 02:08:29,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:08:29,334 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-12-17 02:08:29,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:08:29,335 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-12-17 02:08:29,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 02:08:29,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:08:29,335 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:08:29,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 02:08:29,535 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,SelfDestructingSolverStorable12 [2021-12-17 02:08:29,535 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:08:29,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:08:29,536 INFO L85 PathProgramCache]: Analyzing trace with hash 975408915, now seen corresponding path program 9 times [2021-12-17 02:08:29,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:08:29,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078476631] [2021-12-17 02:08:29,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:08:29,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:08:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:08:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 02:08:29,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:08:29,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078476631] [2021-12-17 02:08:29,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078476631] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:08:29,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445550250] [2021-12-17 02:08:29,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 02:08:29,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:08:29,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:08:29,731 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) [2021-12-17 02:08:29,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 02:08:29,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-17 02:08:29,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:08:29,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 02:08:29,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:08:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 02:08:30,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:08:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 02:08:30,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445550250] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:08:30,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 02:08:30,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-17 02:08:30,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141662491] [2021-12-17 02:08:30,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 02:08:30,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 02:08:30,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:08:30,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 02:08:30,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-17 02:08:30,190 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:08:30,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:08:30,643 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-12-17 02:08:30,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 02:08:30,643 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-17 02:08:30,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:08:30,643 INFO L225 Difference]: With dead ends: 49 [2021-12-17 02:08:30,644 INFO L226 Difference]: Without dead ends: 45 [2021-12-17 02:08:30,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-12-17 02:08:30,644 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 61 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:08:30,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 27 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 02:08:30,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-17 02:08:30,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-12-17 02:08:30,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:08:30,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-12-17 02:08:30,652 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 39 [2021-12-17 02:08:30,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:08:30,652 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-12-17 02:08:30,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:08:30,652 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-12-17 02:08:30,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 02:08:30,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:08:30,653 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:08:30,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 02:08:30,855 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,SelfDestructingSolverStorable13 [2021-12-17 02:08:30,856 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:08:30,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:08:30,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1118330549, now seen corresponding path program 10 times [2021-12-17 02:08:30,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:08:30,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257745497] [2021-12-17 02:08:30,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:08:30,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:08:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:08:33,824 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:08:33,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:08:33,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257745497] [2021-12-17 02:08:33,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257745497] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:08:33,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658896799] [2021-12-17 02:08:33,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 02:08:33,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:08:33,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:08:33,825 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) [2021-12-17 02:08:33,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 02:08:33,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 02:08:33,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:08:33,890 WARN L261 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-17 02:08:33,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:08:33,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 02:08:34,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:34,016 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 14 treesize of output 16 [2021-12-17 02:08:34,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:34,126 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 14 treesize of output 16 [2021-12-17 02:08:34,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:34,247 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 14 treesize of output 16 [2021-12-17 02:08:34,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:34,367 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 14 treesize of output 16 [2021-12-17 02:08:34,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:34,932 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 27 [2021-12-17 02:08:35,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:35,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:35,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 37 [2021-12-17 02:08:35,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:35,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:35,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:35,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:35,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 52 [2021-12-17 02:08:36,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:36,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:36,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:36,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:36,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:36,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:36,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:36,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2021-12-17 02:08:36,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:36,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:36,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:08:36,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:36,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:36,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:36,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:36,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:36,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 63 [2021-12-17 02:08:37,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:37,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:37,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:37,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:37,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:37,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:08:37,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:37,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:37,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:37,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 61 [2021-12-17 02:08:37,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:37,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:37,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:37,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:37,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:37,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:37,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:37,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:37,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:37,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:08:37,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 63 [2021-12-17 02:08:37,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:37,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2021-12-17 02:08:38,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:08:38,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 38 [2021-12-17 02:08:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:08:38,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:08:52,614 INFO L354 Elim1Store]: treesize reduction 3907, result has 18.3 percent of original size [2021-12-17 02:08:52,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 23 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 27 new quantified variables, introduced 190 case distinctions, treesize of input 3764726 treesize of output 871660 [2021-12-17 02:08:56,242 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-17 02:08:56,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 02:08:56,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-12-17 02:08:56,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296748281] [2021-12-17 02:08:56,243 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 02:08:56,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-17 02:08:56,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:08:56,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-17 02:08:56,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=691, Invalid=5951, Unknown=0, NotChecked=0, Total=6642 [2021-12-17 02:08:56,245 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:09:01,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:09:01,950 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2021-12-17 02:09:01,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 02:09:01,950 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-17 02:09:01,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:09:01,950 INFO L225 Difference]: With dead ends: 82 [2021-12-17 02:09:01,950 INFO L226 Difference]: Without dead ends: 78 [2021-12-17 02:09:01,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3738 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=1198, Invalid=10358, Unknown=0, NotChecked=0, Total=11556 [2021-12-17 02:09:01,953 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 37 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 02:09:01,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 85 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 02:09:01,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-17 02:09:01,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 61. [2021-12-17 02:09:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:09:01,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2021-12-17 02:09:01,959 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 41 [2021-12-17 02:09:01,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:09:01,959 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2021-12-17 02:09:01,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:09:01,959 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2021-12-17 02:09:01,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 02:09:01,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:09:01,960 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:09:01,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-17 02:09:02,179 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,SelfDestructingSolverStorable14 [2021-12-17 02:09:02,179 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:09:02,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:09:02,180 INFO L85 PathProgramCache]: Analyzing trace with hash 97262195, now seen corresponding path program 3 times [2021-12-17 02:09:02,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:09:02,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468444948] [2021-12-17 02:09:02,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:09:02,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:09:02,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:09:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 02:09:02,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:09:02,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468444948] [2021-12-17 02:09:02,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468444948] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:09:02,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4229065] [2021-12-17 02:09:02,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 02:09:02,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:09:02,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:09:02,782 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) [2021-12-17 02:09:02,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 02:09:02,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-17 02:09:02,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:09:02,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 02:09:02,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:09:02,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 02:09:03,210 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 02:09:03,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 02:09:03,345 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-12-17 02:09:03,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2021-12-17 02:09:03,549 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-12-17 02:09:03,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 38 [2021-12-17 02:09:03,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 02:09:03,854 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 32 treesize of output 32 [2021-12-17 02:09:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 02:09:04,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:10:07,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2021-12-17 02:10:07,637 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 210 treesize of output 198 [2021-12-17 02:10:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 23 proven. 20 refuted. 2 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 02:10:07,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4229065] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:10:07,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 02:10:07,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 17] total 46 [2021-12-17 02:10:07,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681825576] [2021-12-17 02:10:07,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 02:10:07,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-17 02:10:07,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:10:07,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-17 02:10:07,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=1657, Unknown=17, NotChecked=0, Total=2070 [2021-12-17 02:10:07,700 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:11:11,325 WARN L227 SmtUtils]: Spent 8.37s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 02:11:37,820 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= |c_ULTIMATE.start_main_#t~mem8#1| 1)) (.cse1 (+ (* 4 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (or .cse0 (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) c_~N~0) (<= c_~N~0 2)) (or (forall ((|ULTIMATE.start_main_~i~0#1| Int) (|v_ULTIMATE.start_main_~i~0#1_204| Int) (v_ArrVal_704 Int)) (or (= 1 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_704) (+ (* |v_ULTIMATE.start_main_~i~0#1_204| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (< (+ |v_ULTIMATE.start_main_~i~0#1_204| 1) c_~N~0) (<= c_~N~0 |v_ULTIMATE.start_main_~i~0#1_204|) (< |v_ULTIMATE.start_main_~i~0#1_204| (+ |ULTIMATE.start_main_~i~0#1| 1)))) (<= c_~N~0 3)) (< 1 c_~N~0) (<= .cse1 12) (< |c_ULTIMATE.start_main_~i~0#1| c_~N~0) .cse0 (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (< 11 .cse1))) is different from false [2021-12-17 02:12:16,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:12:16,788 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2021-12-17 02:12:16,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-17 02:12:16,788 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-17 02:12:16,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:12:16,789 INFO L225 Difference]: With dead ends: 103 [2021-12-17 02:12:16,789 INFO L226 Difference]: Without dead ends: 72 [2021-12-17 02:12:16,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 192.2s TimeCoverageRelationStatistics Valid=1220, Invalid=5348, Unknown=78, NotChecked=160, Total=6806 [2021-12-17 02:12:16,790 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:12:16,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 49 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 269 Invalid, 0 Unknown, 140 Unchecked, 0.3s Time] [2021-12-17 02:12:16,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-17 02:12:16,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2021-12-17 02:12:16,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 66 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:12:16,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2021-12-17 02:12:16,800 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 41 [2021-12-17 02:12:16,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:12:16,801 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2021-12-17 02:12:16,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:12:16,801 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2021-12-17 02:12:16,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 02:12:16,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:12:16,801 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:12:16,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-17 02:12:17,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:12:17,002 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:12:17,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:12:17,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1027067351, now seen corresponding path program 11 times [2021-12-17 02:12:17,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:12:17,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893155993] [2021-12-17 02:12:17,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:12:17,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:12:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:12:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 02:12:17,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:12:17,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893155993] [2021-12-17 02:12:17,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893155993] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:12:17,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340824321] [2021-12-17 02:12:17,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 02:12:17,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:12:17,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:12:17,169 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 02:12:17,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 02:12:17,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-17 02:12:17,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:12:17,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 02:12:17,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:12:17,566 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 02:12:17,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:12:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 02:12:17,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340824321] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:12:17,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 02:12:17,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-17 02:12:17,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553531947] [2021-12-17 02:12:17,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 02:12:17,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 02:12:17,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:12:17,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 02:12:17,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-17 02:12:17,702 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:12:18,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:12:18,053 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2021-12-17 02:12:18,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 02:12:18,053 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-17 02:12:18,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:12:18,054 INFO L225 Difference]: With dead ends: 120 [2021-12-17 02:12:18,054 INFO L226 Difference]: Without dead ends: 76 [2021-12-17 02:12:18,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-12-17 02:12:18,054 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 127 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:12:18,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 33 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 02:12:18,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-17 02:12:18,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 60. [2021-12-17 02:12:18,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.11864406779661) internal successors, (66), 59 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:12:18,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-12-17 02:12:18,060 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 43 [2021-12-17 02:12:18,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:12:18,060 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-12-17 02:12:18,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:12:18,061 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-12-17 02:12:18,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 02:12:18,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:12:18,061 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:12:18,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-17 02:12:18,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-17 02:12:18,273 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:12:18,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:12:18,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1565898487, now seen corresponding path program 12 times [2021-12-17 02:12:18,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:12:18,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252485118] [2021-12-17 02:12:18,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:12:18,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:12:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:12:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 02:12:18,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:12:18,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252485118] [2021-12-17 02:12:18,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252485118] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:12:18,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233923940] [2021-12-17 02:12:18,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 02:12:18,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:12:18,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:12:18,455 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 02:12:18,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 02:12:18,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-17 02:12:18,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:12:18,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 02:12:18,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:12:18,812 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 02:12:18,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:12:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 02:12:18,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233923940] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:12:18,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 02:12:18,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-17 02:12:18,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925476933] [2021-12-17 02:12:18,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 02:12:18,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 02:12:18,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:12:18,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 02:12:18,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-17 02:12:18,972 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:12:19,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:12:19,400 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2021-12-17 02:12:19,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 02:12:19,401 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-17 02:12:19,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:12:19,401 INFO L225 Difference]: With dead ends: 71 [2021-12-17 02:12:19,401 INFO L226 Difference]: Without dead ends: 57 [2021-12-17 02:12:19,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2021-12-17 02:12:19,402 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 135 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:12:19,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 21 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 02:12:19,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-17 02:12:19,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2021-12-17 02:12:19,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:12:19,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2021-12-17 02:12:19,406 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 43 [2021-12-17 02:12:19,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:12:19,406 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2021-12-17 02:12:19,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:12:19,407 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2021-12-17 02:12:19,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-17 02:12:19,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:12:19,407 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] [2021-12-17 02:12:19,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-17 02:12:19,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 02:12:19,612 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:12:19,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:12:19,612 INFO L85 PathProgramCache]: Analyzing trace with hash 775276721, now seen corresponding path program 13 times [2021-12-17 02:12:19,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:12:19,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485128925] [2021-12-17 02:12:19,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:12:19,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:12:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:12:23,035 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:12:23,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:12:23,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485128925] [2021-12-17 02:12:23,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485128925] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:12:23,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331841946] [2021-12-17 02:12:23,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 02:12:23,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:12:23,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:12:23,037 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 02:12:23,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-17 02:12:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:12:23,109 WARN L261 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 115 conjunts are in the unsatisfiable core [2021-12-17 02:12:23,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:12:23,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 02:12:23,133 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 [2021-12-17 02:12:23,146 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 14 treesize of output 16 [2021-12-17 02:12:23,185 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 14 treesize of output 16 [2021-12-17 02:12:23,293 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 14 treesize of output 16 [2021-12-17 02:12:23,417 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 14 treesize of output 16 [2021-12-17 02:12:23,606 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 14 treesize of output 16 [2021-12-17 02:12:24,086 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 27 [2021-12-17 02:12:24,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:24,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2021-12-17 02:12:24,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:24,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:24,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:24,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 57 [2021-12-17 02:12:25,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:25,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:25,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:25,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:25,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:25,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:25,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 61 [2021-12-17 02:12:25,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:25,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:25,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:25,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:25,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:25,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:25,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:25,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:25,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:25,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:25,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 71 [2021-12-17 02:12:26,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:12:26,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 75 [2021-12-17 02:12:26,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:12:26,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 73 [2021-12-17 02:12:26,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:12:26,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:26,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 78 [2021-12-17 02:12:27,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:27,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:27,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:27,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:27,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:27,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:27,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:27,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:27,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:27,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:27,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 02:12:27,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:27,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 02:12:27,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 75 [2021-12-17 02:12:27,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 65 [2021-12-17 02:12:27,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 44 [2021-12-17 02:12:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:12:27,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:14:34,636 WARN L227 SmtUtils]: Spent 1.53m on a formula simplification. DAG size of input: 4996 DAG size of output: 1729 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-17 02:14:34,640 INFO L354 Elim1Store]: treesize reduction 32760, result has 13.4 percent of original size [2021-12-17 02:14:34,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 106 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 111 new quantified variables, introduced 1070 case distinctions, treesize of input 183439197920 treesize of output 32655116230 Killed by 15