./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/nsqm-if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e1ff0e6 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/nsqm-if.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 8d7989c0f7330a23b935c06e29a235b3d1d683ab2aa8325b4804307d493787f2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-14 22:16:05,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 22:16:05,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 22:16:05,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 22:16:05,054 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 22:16:05,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 22:16:05,055 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 22:16:05,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 22:16:05,057 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 22:16:05,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 22:16:05,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 22:16:05,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 22:16:05,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 22:16:05,060 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 22:16:05,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 22:16:05,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 22:16:05,067 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 22:16:05,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 22:16:05,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 22:16:05,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 22:16:05,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 22:16:05,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 22:16:05,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 22:16:05,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 22:16:05,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 22:16:05,081 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 22:16:05,082 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 22:16:05,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 22:16:05,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 22:16:05,084 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 22:16:05,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 22:16:05,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 22:16:05,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 22:16:05,086 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 22:16:05,087 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 22:16:05,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 22:16:05,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 22:16:05,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 22:16:05,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 22:16:05,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 22:16:05,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 22:16:05,092 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 22:16:05,114 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 22:16:05,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 22:16:05,115 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 22:16:05,115 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 22:16:05,116 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 22:16:05,116 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 22:16:05,116 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 22:16:05,116 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 22:16:05,117 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 22:16:05,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 22:16:05,117 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 22:16:05,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 22:16:05,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 22:16:05,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 22:16:05,118 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 22:16:05,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 22:16:05,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 22:16:05,118 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 22:16:05,118 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 22:16:05,118 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 22:16:05,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 22:16:05,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 22:16:05,119 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 22:16:05,119 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 22:16:05,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 22:16:05,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 22:16:05,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 22:16:05,120 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 22:16:05,120 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 22:16:05,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 22:16:05,120 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 22:16:05,120 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 22:16:05,120 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 22:16:05,120 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 22:16:05,121 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 22:16:05,121 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d7989c0f7330a23b935c06e29a235b3d1d683ab2aa8325b4804307d493787f2 [2023-02-14 22:16:05,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 22:16:05,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 22:16:05,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 22:16:05,311 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 22:16:05,311 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 22:16:05,312 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/nsqm-if.c [2023-02-14 22:16:06,305 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 22:16:06,521 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 22:16:06,522 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqm-if.c [2023-02-14 22:16:06,527 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb82c9922/e8cfc5c68abd4071a61bcc4b81c87fe3/FLAG259809e45 [2023-02-14 22:16:06,543 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb82c9922/e8cfc5c68abd4071a61bcc4b81c87fe3 [2023-02-14 22:16:06,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 22:16:06,547 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 22:16:06,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 22:16:06,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 22:16:06,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 22:16:06,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:16:06" (1/1) ... [2023-02-14 22:16:06,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f8c753a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:06, skipping insertion in model container [2023-02-14 22:16:06,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:16:06" (1/1) ... [2023-02-14 22:16:06,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 22:16:06,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 22:16:06,701 WARN L237 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/nsqm-if.c[590,603] [2023-02-14 22:16:06,712 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 22:16:06,718 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 22:16:06,726 WARN L237 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/nsqm-if.c[590,603] [2023-02-14 22:16:06,731 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 22:16:06,740 INFO L208 MainTranslator]: Completed translation [2023-02-14 22:16:06,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:06 WrapperNode [2023-02-14 22:16:06,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 22:16:06,742 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 22:16:06,742 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 22:16:06,742 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 22:16:06,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:06" (1/1) ... [2023-02-14 22:16:06,751 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:06" (1/1) ... [2023-02-14 22:16:06,763 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2023-02-14 22:16:06,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 22:16:06,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 22:16:06,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 22:16:06,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 22:16:06,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:06" (1/1) ... [2023-02-14 22:16:06,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:06" (1/1) ... [2023-02-14 22:16:06,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:06" (1/1) ... [2023-02-14 22:16:06,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:06" (1/1) ... [2023-02-14 22:16:06,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:06" (1/1) ... [2023-02-14 22:16:06,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:06" (1/1) ... [2023-02-14 22:16:06,778 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:06" (1/1) ... [2023-02-14 22:16:06,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:06" (1/1) ... [2023-02-14 22:16:06,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 22:16:06,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 22:16:06,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 22:16:06,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 22:16:06,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:06" (1/1) ... [2023-02-14 22:16:06,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 22:16:06,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:16:06,803 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) [2023-02-14 22:16:06,808 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 [2023-02-14 22:16:06,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 22:16:06,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 22:16:06,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 22:16:06,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-14 22:16:06,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 22:16:06,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 22:16:06,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 22:16:06,888 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 22:16:06,890 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 22:16:07,056 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 22:16:07,060 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 22:16:07,060 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-14 22:16:07,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:16:07 BoogieIcfgContainer [2023-02-14 22:16:07,068 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 22:16:07,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 22:16:07,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 22:16:07,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 22:16:07,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:16:06" (1/3) ... [2023-02-14 22:16:07,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f12030a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:16:07, skipping insertion in model container [2023-02-14 22:16:07,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:06" (2/3) ... [2023-02-14 22:16:07,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f12030a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:16:07, skipping insertion in model container [2023-02-14 22:16:07,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:16:07" (3/3) ... [2023-02-14 22:16:07,089 INFO L112 eAbstractionObserver]: Analyzing ICFG nsqm-if.c [2023-02-14 22:16:07,101 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 22:16:07,101 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 22:16:07,179 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 22:16:07,185 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2108fd3b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 22:16:07,185 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 22:16:07,188 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 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) [2023-02-14 22:16:07,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-14 22:16:07,193 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:16:07,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:16:07,194 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:16:07,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:16:07,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2023-02-14 22:16:07,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:16:07,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464210847] [2023-02-14 22:16:07,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:16:07,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:16:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:16:07,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:16:07,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464210847] [2023-02-14 22:16:07,325 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-14 22:16:07,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674591827] [2023-02-14 22:16:07,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:16:07,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:16:07,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:16:07,339 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) [2023-02-14 22:16:07,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 22:16:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:16:07,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-14 22:16:07,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:16:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:16:07,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:16:07,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674591827] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:16:07,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:16:07,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 22:16:07,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198296239] [2023-02-14 22:16:07,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:16:07,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 22:16:07,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:16:07,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 22:16:07,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 22:16:07,447 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 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 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-02-14 22:16:07,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:16:07,458 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2023-02-14 22:16:07,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 22:16:07,459 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2023-02-14 22:16:07,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:16:07,464 INFO L225 Difference]: With dead ends: 42 [2023-02-14 22:16:07,465 INFO L226 Difference]: Without dead ends: 19 [2023-02-14 22:16:07,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 22:16:07,469 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:16:07,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:16:07,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-14 22:16:07,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-14 22:16:07,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:16:07,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-02-14 22:16:07,492 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2023-02-14 22:16:07,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:16:07,493 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-02-14 22:16:07,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-02-14 22:16:07,493 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-02-14 22:16:07,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-14 22:16:07,494 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:16:07,494 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:16:07,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 22:16:07,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-14 22:16:07,700 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:16:07,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:16:07,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2023-02-14 22:16:07,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:16:07,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835739799] [2023-02-14 22:16:07,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:16:07,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:16:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:16:07,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:16:07,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835739799] [2023-02-14 22:16:07,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-14 22:16:07,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521281027] [2023-02-14 22:16:07,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:16:07,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:16:07,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:16:07,774 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) [2023-02-14 22:16:07,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 22:16:07,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:16:07,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-14 22:16:07,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:16:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:16:07,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:16:07,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521281027] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:16:07,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:16:07,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 22:16:07,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756851255] [2023-02-14 22:16:07,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:16:07,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 22:16:07,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:16:07,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 22:16:07,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 22:16:07,862 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2023-02-14 22:16:07,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:16:07,898 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-02-14 22:16:07,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 22:16:07,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2023-02-14 22:16:07,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:16:07,899 INFO L225 Difference]: With dead ends: 42 [2023-02-14 22:16:07,899 INFO L226 Difference]: Without dead ends: 31 [2023-02-14 22:16:07,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 22:16:07,900 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:16:07,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 15 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:16:07,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-14 22:16:07,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2023-02-14 22:16:07,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 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) [2023-02-14 22:16:07,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-02-14 22:16:07,905 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2023-02-14 22:16:07,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:16:07,905 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-02-14 22:16:07,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2023-02-14 22:16:07,905 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-02-14 22:16:07,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-14 22:16:07,906 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:16:07,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:16:07,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 22:16:08,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-14 22:16:08,114 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:16:08,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:16:08,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2023-02-14 22:16:08,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:16:08,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74455208] [2023-02-14 22:16:08,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:16:08,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:16:08,139 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:16:08,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883162887] [2023-02-14 22:16:08,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:16:08,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:16:08,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:16:08,146 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) [2023-02-14 22:16:08,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 22:16:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:16:08,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 22:16:08,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:16:08,236 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 22:16:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 22:16:08,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:16:08,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:16:08,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74455208] [2023-02-14 22:16:08,290 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:16:08,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883162887] [2023-02-14 22:16:08,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883162887] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:16:08,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:16:08,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 22:16:08,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795904578] [2023-02-14 22:16:08,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:16:08,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 22:16:08,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:16:08,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 22:16:08,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:16:08,293 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2023-02-14 22:16:08,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:16:08,372 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2023-02-14 22:16:08,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 22:16:08,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 18 [2023-02-14 22:16:08,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:16:08,375 INFO L225 Difference]: With dead ends: 38 [2023-02-14 22:16:08,376 INFO L226 Difference]: Without dead ends: 36 [2023-02-14 22:16:08,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-14 22:16:08,378 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 15 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:16:08,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 60 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:16:08,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-14 22:16:08,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2023-02-14 22:16:08,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 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) [2023-02-14 22:16:08,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-02-14 22:16:08,390 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 18 [2023-02-14 22:16:08,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:16:08,390 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-02-14 22:16:08,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2023-02-14 22:16:08,391 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-02-14 22:16:08,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-14 22:16:08,392 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:16:08,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:16:08,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 22:16:08,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:16:08,599 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:16:08,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:16:08,600 INFO L85 PathProgramCache]: Analyzing trace with hash -217194585, now seen corresponding path program 1 times [2023-02-14 22:16:08,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:16:08,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463102183] [2023-02-14 22:16:08,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:16:08,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:16:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:16:08,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:16:08,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463102183] [2023-02-14 22:16:08,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-14 22:16:08,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570422071] [2023-02-14 22:16:08,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:16:08,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:16:08,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:16:08,648 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) [2023-02-14 22:16:08,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 22:16:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:16:08,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-14 22:16:08,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:16:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 22:16:08,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:16:08,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570422071] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:16:08,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:16:08,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 22:16:08,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935066745] [2023-02-14 22:16:08,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:16:08,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 22:16:08,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:16:08,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 22:16:08,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 22:16:08,705 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2023-02-14 22:16:08,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:16:08,733 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2023-02-14 22:16:08,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 22:16:08,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 18 [2023-02-14 22:16:08,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:16:08,735 INFO L225 Difference]: With dead ends: 55 [2023-02-14 22:16:08,735 INFO L226 Difference]: Without dead ends: 35 [2023-02-14 22:16:08,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 22:16:08,739 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:16:08,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 22 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:16:08,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-14 22:16:08,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2023-02-14 22:16:08,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 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) [2023-02-14 22:16:08,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-02-14 22:16:08,749 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2023-02-14 22:16:08,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:16:08,750 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-02-14 22:16:08,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2023-02-14 22:16:08,750 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-02-14 22:16:08,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-14 22:16:08,750 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:16:08,750 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:16:08,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 22:16:08,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:16:08,955 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:16:08,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:16:08,956 INFO L85 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2023-02-14 22:16:08,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:16:08,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052713367] [2023-02-14 22:16:08,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:16:08,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:16:08,972 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:16:08,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612673983] [2023-02-14 22:16:08,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:16:08,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:16:08,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:16:08,991 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) [2023-02-14 22:16:08,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 22:16:09,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:16:09,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 22:16:09,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:16:09,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:16:09,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:16:09,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:16:09,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:16:09,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052713367] [2023-02-14 22:16:09,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:16:09,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612673983] [2023-02-14 22:16:09,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612673983] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:16:09,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:16:09,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-14 22:16:09,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573693396] [2023-02-14 22:16:09,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:16:09,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 22:16:09,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:16:09,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 22:16:09,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:16:09,119 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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) [2023-02-14 22:16:09,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:16:09,229 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2023-02-14 22:16:09,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 22:16:09,229 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 21 [2023-02-14 22:16:09,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:16:09,230 INFO L225 Difference]: With dead ends: 70 [2023-02-14 22:16:09,230 INFO L226 Difference]: Without dead ends: 43 [2023-02-14 22:16:09,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-02-14 22:16:09,230 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:16:09,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 43 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:16:09,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-14 22:16:09,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2023-02-14 22:16:09,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2023-02-14 22:16:09,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-02-14 22:16:09,233 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2023-02-14 22:16:09,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:16:09,233 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-02-14 22:16:09,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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) [2023-02-14 22:16:09,233 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-02-14 22:16:09,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 22:16:09,234 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:16:09,234 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:16:09,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 22:16:09,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:16:09,438 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:16:09,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:16:09,439 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2023-02-14 22:16:09,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:16:09,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363864964] [2023-02-14 22:16:09,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:16:09,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:16:09,469 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:16:09,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970954606] [2023-02-14 22:16:09,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:16:09,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:16:09,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:16:09,471 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) [2023-02-14 22:16:09,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 22:16:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:16:09,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-14 22:16:09,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:16:09,576 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 22:16:09,629 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 23 treesize of output 22 [2023-02-14 22:16:09,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:16:09,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:16:09,876 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 22:16:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 22:16:09,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:16:09,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363864964] [2023-02-14 22:16:09,895 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:16:09,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970954606] [2023-02-14 22:16:09,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970954606] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:16:09,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:16:09,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-02-14 22:16:09,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458809202] [2023-02-14 22:16:09,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:16:09,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 22:16:09,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:16:09,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 22:16:09,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-02-14 22:16:09,897 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 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) [2023-02-14 22:16:10,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:16:10,246 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2023-02-14 22:16:10,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-14 22:16:10,247 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 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 24 [2023-02-14 22:16:10,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:16:10,247 INFO L225 Difference]: With dead ends: 112 [2023-02-14 22:16:10,247 INFO L226 Difference]: Without dead ends: 92 [2023-02-14 22:16:10,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-02-14 22:16:10,248 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 92 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 22:16:10,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 101 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 22:16:10,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-14 22:16:10,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 40. [2023-02-14 22:16:10,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 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) [2023-02-14 22:16:10,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2023-02-14 22:16:10,253 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 24 [2023-02-14 22:16:10,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:16:10,254 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2023-02-14 22:16:10,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 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) [2023-02-14 22:16:10,254 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2023-02-14 22:16:10,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 22:16:10,254 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:16:10,254 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:16:10,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 22:16:10,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:16:10,459 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:16:10,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:16:10,461 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2023-02-14 22:16:10,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:16:10,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580812578] [2023-02-14 22:16:10,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:16:10,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:16:10,479 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:16:10,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751901711] [2023-02-14 22:16:10,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:16:10,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:16:10,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:16:10,491 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) [2023-02-14 22:16:10,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 22:16:10,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:16:10,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-14 22:16:10,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:16:10,580 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 22:16:10,613 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 22:16:10,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:16:10,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-14 22:16:10,737 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2023-02-14 22:16:10,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:16:10,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2023-02-14 22:16:10,977 INFO L350 Elim1Store]: Elim1 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 68 treesize of output 32 [2023-02-14 22:16:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:16:10,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:16:11,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:16:11,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:16:11,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580812578] [2023-02-14 22:16:11,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:16:11,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751901711] [2023-02-14 22:16:11,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751901711] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:16:11,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:16:11,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2023-02-14 22:16:11,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027020291] [2023-02-14 22:16:11,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:16:11,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 22:16:11,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:16:11,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 22:16:11,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-02-14 22:16:11,670 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 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) [2023-02-14 22:16:16,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:16:16,978 INFO L93 Difference]: Finished difference Result 175 states and 197 transitions. [2023-02-14 22:16:16,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-14 22:16:16,979 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 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 28 [2023-02-14 22:16:16,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:16:16,981 INFO L225 Difference]: With dead ends: 175 [2023-02-14 22:16:16,981 INFO L226 Difference]: Without dead ends: 173 [2023-02-14 22:16:16,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=666, Invalid=2304, Unknown=0, NotChecked=0, Total=2970 [2023-02-14 22:16:16,982 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 414 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:16:16,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 175 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-14 22:16:16,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-02-14 22:16:16,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 80. [2023-02-14 22:16:17,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2784810126582278) internal successors, (101), 79 states have internal predecessors, (101), 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) [2023-02-14 22:16:17,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2023-02-14 22:16:17,007 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 28 [2023-02-14 22:16:17,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:16:17,008 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2023-02-14 22:16:17,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 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) [2023-02-14 22:16:17,008 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2023-02-14 22:16:17,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-14 22:16:17,009 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:16:17,010 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:16:17,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-14 22:16:17,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:16:17,215 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:16:17,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:16:17,215 INFO L85 PathProgramCache]: Analyzing trace with hash 877615566, now seen corresponding path program 2 times [2023-02-14 22:16:17,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:16:17,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035306784] [2023-02-14 22:16:17,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:16:17,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:16:17,255 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:16:17,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923814537] [2023-02-14 22:16:17,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 22:16:17,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:16:17,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:16:17,257 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) [2023-02-14 22:16:17,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 22:16:17,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 22:16:17,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:16:17,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 22:16:17,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:16:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 22:16:17,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:16:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 22:16:17,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:16:17,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035306784] [2023-02-14 22:16:17,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:16:17,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923814537] [2023-02-14 22:16:17,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923814537] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:16:17,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:16:17,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-02-14 22:16:17,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95884299] [2023-02-14 22:16:17,444 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:16:17,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 22:16:17,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:16:17,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 22:16:17,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-14 22:16:17,445 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 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) [2023-02-14 22:16:17,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:16:17,574 INFO L93 Difference]: Finished difference Result 190 states and 228 transitions. [2023-02-14 22:16:17,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 22:16:17,575 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 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 [2023-02-14 22:16:17,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:16:17,576 INFO L225 Difference]: With dead ends: 190 [2023-02-14 22:16:17,576 INFO L226 Difference]: Without dead ends: 122 [2023-02-14 22:16:17,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-02-14 22:16:17,576 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 83 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:16:17,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 59 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:16:17,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-14 22:16:17,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2023-02-14 22:16:17,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.21875) internal successors, (117), 96 states have internal predecessors, (117), 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) [2023-02-14 22:16:17,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2023-02-14 22:16:17,588 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 32 [2023-02-14 22:16:17,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:16:17,589 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2023-02-14 22:16:17,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 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) [2023-02-14 22:16:17,589 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2023-02-14 22:16:17,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-14 22:16:17,590 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:16:17,590 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:16:17,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 22:16:17,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-14 22:16:17,795 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:16:17,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:16:17,795 INFO L85 PathProgramCache]: Analyzing trace with hash -187195163, now seen corresponding path program 2 times [2023-02-14 22:16:17,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:16:17,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790929775] [2023-02-14 22:16:17,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:16:17,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:16:17,813 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:16:17,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863834862] [2023-02-14 22:16:17,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 22:16:17,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:16:17,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:16:17,815 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) [2023-02-14 22:16:17,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 22:16:17,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 22:16:17,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:16:17,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 22:16:17,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:16:17,951 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 22:16:17,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:16:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 22:16:18,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:16:18,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790929775] [2023-02-14 22:16:18,017 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:16:18,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863834862] [2023-02-14 22:16:18,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863834862] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:16:18,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:16:18,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-02-14 22:16:18,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941033588] [2023-02-14 22:16:18,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:16:18,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-14 22:16:18,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:16:18,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-14 22:16:18,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-02-14 22:16:18,018 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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) [2023-02-14 22:16:18,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:16:18,224 INFO L93 Difference]: Finished difference Result 236 states and 273 transitions. [2023-02-14 22:16:18,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-14 22:16:18,225 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 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 [2023-02-14 22:16:18,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:16:18,226 INFO L225 Difference]: With dead ends: 236 [2023-02-14 22:16:18,226 INFO L226 Difference]: Without dead ends: 177 [2023-02-14 22:16:18,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2023-02-14 22:16:18,227 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 141 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:16:18,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 92 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:16:18,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-02-14 22:16:18,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2023-02-14 22:16:18,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.1879699248120301) internal successors, (158), 133 states have internal predecessors, (158), 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) [2023-02-14 22:16:18,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2023-02-14 22:16:18,240 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 36 [2023-02-14 22:16:18,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:16:18,241 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2023-02-14 22:16:18,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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) [2023-02-14 22:16:18,241 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2023-02-14 22:16:18,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-14 22:16:18,242 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:16:18,242 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:16:18,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 22:16:18,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:16:18,446 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:16:18,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:16:18,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1173959464, now seen corresponding path program 3 times [2023-02-14 22:16:18,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:16:18,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023389567] [2023-02-14 22:16:18,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:16:18,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:16:18,464 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:16:18,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737769703] [2023-02-14 22:16:18,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 22:16:18,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:16:18,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:16:18,466 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) [2023-02-14 22:16:18,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 22:16:18,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-14 22:16:18,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:16:18,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-14 22:16:18,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:16:18,765 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 22:16:18,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:16:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 22:16:18,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:16:18,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023389567] [2023-02-14 22:16:18,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:16:18,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737769703] [2023-02-14 22:16:18,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737769703] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:16:18,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:16:18,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2023-02-14 22:16:18,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71420404] [2023-02-14 22:16:18,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:16:18,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 22:16:18,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:16:18,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 22:16:18,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2023-02-14 22:16:18,873 INFO L87 Difference]: Start difference. First operand 134 states and 158 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 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) [2023-02-14 22:16:19,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:16:19,433 INFO L93 Difference]: Finished difference Result 171 states and 193 transitions. [2023-02-14 22:16:19,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-14 22:16:19,433 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 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 37 [2023-02-14 22:16:19,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:16:19,434 INFO L225 Difference]: With dead ends: 171 [2023-02-14 22:16:19,434 INFO L226 Difference]: Without dead ends: 162 [2023-02-14 22:16:19,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=412, Invalid=1394, Unknown=0, NotChecked=0, Total=1806 [2023-02-14 22:16:19,435 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 147 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 22:16:19,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 92 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 22:16:19,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-02-14 22:16:19,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 134. [2023-02-14 22:16:19,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.1729323308270676) internal successors, (156), 133 states have internal predecessors, (156), 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) [2023-02-14 22:16:19,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 156 transitions. [2023-02-14 22:16:19,449 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 156 transitions. Word has length 37 [2023-02-14 22:16:19,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:16:19,450 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 156 transitions. [2023-02-14 22:16:19,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 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) [2023-02-14 22:16:19,450 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 156 transitions. [2023-02-14 22:16:19,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-14 22:16:19,451 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:16:19,451 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:16:19,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 22:16:19,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-14 22:16:19,656 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:16:19,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:16:19,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1129715953, now seen corresponding path program 4 times [2023-02-14 22:16:19,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:16:19,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934427268] [2023-02-14 22:16:19,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:16:19,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:16:19,673 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:16:19,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130133280] [2023-02-14 22:16:19,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 22:16:19,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:16:19,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:16:19,674 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) [2023-02-14 22:16:19,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 22:16:19,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 22:16:19,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:16:19,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-14 22:16:19,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:16:19,867 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 22:16:19,881 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 22:16:19,925 INFO L350 Elim1Store]: Elim1 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 110 treesize of output 99 [2023-02-14 22:16:19,928 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:16:19,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:16:19,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:16:19,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:16:19,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:16:19,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2023-02-14 22:16:19,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:16:19,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:16:19,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 88 [2023-02-14 22:16:20,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:16:20,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:16:20,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2023-02-14 22:16:20,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:16:20,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2023-02-14 22:16:20,192 INFO L350 Elim1Store]: Elim1 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 161 treesize of output 145 [2023-02-14 22:16:20,198 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:16:20,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:16:20,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:16:20,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:16:20,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 201 [2023-02-14 22:16:20,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:16:20,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 52 [2023-02-14 22:16:20,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:16:20,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:16:20,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:16:20,338 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:16:20,341 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-02-14 22:16:20,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 62 [2023-02-14 22:16:20,595 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-02-14 22:16:20,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 107 treesize of output 51 [2023-02-14 22:16:20,608 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:16:20,608 INFO L328 TraceCheckSpWp]: Computing backward predicates...