./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/loops-crafted-1/mono-crafted_13.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 7a1978d5df6cab978f117700980416150440efa7bda2d4cde0711b48b83f0666 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 02:50:13,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 02:50:13,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 02:50:13,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 02:50:13,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 02:50:13,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 02:50:13,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 02:50:13,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 02:50:13,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 02:50:13,993 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 02:50:13,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 02:50:13,999 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 02:50:13,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 02:50:14,001 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 02:50:14,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 02:50:14,004 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 02:50:14,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 02:50:14,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 02:50:14,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 02:50:14,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 02:50:14,008 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 02:50:14,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 02:50:14,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 02:50:14,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 02:50:14,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 02:50:14,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 02:50:14,023 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 02:50:14,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 02:50:14,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 02:50:14,024 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 02:50:14,025 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 02:50:14,025 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 02:50:14,026 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 02:50:14,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 02:50:14,028 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 02:50:14,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 02:50:14,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 02:50:14,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 02:50:14,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 02:50:14,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 02:50:14,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 02:50:14,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 02:50:14,034 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 02:50:14,067 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 02:50:14,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 02:50:14,069 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 02:50:14,069 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 02:50:14,070 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 02:50:14,070 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 02:50:14,070 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 02:50:14,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 02:50:14,071 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 02:50:14,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 02:50:14,072 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 02:50:14,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 02:50:14,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 02:50:14,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 02:50:14,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 02:50:14,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 02:50:14,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 02:50:14,073 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 02:50:14,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 02:50:14,074 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 02:50:14,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 02:50:14,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 02:50:14,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 02:50:14,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 02:50:14,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:50:14,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 02:50:14,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 02:50:14,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 02:50:14,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 02:50:14,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 02:50:14,076 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 02:50:14,076 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 02:50:14,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 02:50:14,077 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a1978d5df6cab978f117700980416150440efa7bda2d4cde0711b48b83f0666 [2022-07-21 02:50:14,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 02:50:14,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 02:50:14,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 02:50:14,384 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 02:50:14,385 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 02:50:14,386 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c [2022-07-21 02:50:14,441 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/417245a2e/5d48d44c5294447798944f3ff4be46a8/FLAGc149aa60b [2022-07-21 02:50:14,860 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 02:50:14,861 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c [2022-07-21 02:50:14,865 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/417245a2e/5d48d44c5294447798944f3ff4be46a8/FLAGc149aa60b [2022-07-21 02:50:15,279 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/417245a2e/5d48d44c5294447798944f3ff4be46a8 [2022-07-21 02:50:15,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 02:50:15,282 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 02:50:15,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 02:50:15,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 02:50:15,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 02:50:15,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:50:15" (1/1) ... [2022-07-21 02:50:15,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d26fb9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:50:15, skipping insertion in model container [2022-07-21 02:50:15,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:50:15" (1/1) ... [2022-07-21 02:50:15,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 02:50:15,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 02:50:15,464 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c[319,332] [2022-07-21 02:50:15,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:50:15,485 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 02:50:15,496 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c[319,332] [2022-07-21 02:50:15,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:50:15,538 INFO L208 MainTranslator]: Completed translation [2022-07-21 02:50:15,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:50:15 WrapperNode [2022-07-21 02:50:15,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 02:50:15,539 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 02:50:15,539 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 02:50:15,539 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 02:50:15,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:50:15" (1/1) ... [2022-07-21 02:50:15,553 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:50:15" (1/1) ... [2022-07-21 02:50:15,566 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2022-07-21 02:50:15,567 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 02:50:15,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 02:50:15,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 02:50:15,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 02:50:15,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:50:15" (1/1) ... [2022-07-21 02:50:15,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:50:15" (1/1) ... [2022-07-21 02:50:15,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:50:15" (1/1) ... [2022-07-21 02:50:15,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:50:15" (1/1) ... [2022-07-21 02:50:15,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:50:15" (1/1) ... [2022-07-21 02:50:15,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:50:15" (1/1) ... [2022-07-21 02:50:15,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:50:15" (1/1) ... [2022-07-21 02:50:15,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 02:50:15,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 02:50:15,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 02:50:15,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 02:50:15,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:50:15" (1/1) ... [2022-07-21 02:50:15,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:50:15,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:50:15,624 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) [2022-07-21 02:50:15,650 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 [2022-07-21 02:50:15,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 02:50:15,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 02:50:15,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 02:50:15,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 02:50:15,734 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 02:50:15,735 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 02:50:15,855 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 02:50:15,862 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 02:50:15,862 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 02:50:15,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:50:15 BoogieIcfgContainer [2022-07-21 02:50:15,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 02:50:15,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 02:50:15,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 02:50:15,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 02:50:15,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:50:15" (1/3) ... [2022-07-21 02:50:15,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37313df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:50:15, skipping insertion in model container [2022-07-21 02:50:15,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:50:15" (2/3) ... [2022-07-21 02:50:15,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37313df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:50:15, skipping insertion in model container [2022-07-21 02:50:15,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:50:15" (3/3) ... [2022-07-21 02:50:15,870 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_13.c [2022-07-21 02:50:15,881 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 02:50:15,882 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 02:50:15,935 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 02:50:15,943 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2095293b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c1fee56 [2022-07-21 02:50:15,943 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 02:50:15,947 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 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) [2022-07-21 02:50:15,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 02:50:15,959 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:50:15,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:50:15,961 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:50:15,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:50:15,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1818421976, now seen corresponding path program 1 times [2022-07-21 02:50:15,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:50:15,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039125869] [2022-07-21 02:50:15,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:50:15,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:50:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:50:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:50:16,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:50:16,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039125869] [2022-07-21 02:50:16,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039125869] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:50:16,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:50:16,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 02:50:16,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511099468] [2022-07-21 02:50:16,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:50:16,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 02:50:16,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:50:16,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 02:50:16,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:50:16,128 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 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) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-07-21 02:50:16,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:50:16,140 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2022-07-21 02:50:16,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 02:50:16,142 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2022-07-21 02:50:16,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:50:16,150 INFO L225 Difference]: With dead ends: 22 [2022-07-21 02:50:16,150 INFO L226 Difference]: Without dead ends: 9 [2022-07-21 02:50:16,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:50:16,156 INFO L413 NwaCegarLoop]: 15 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, 15 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 [2022-07-21 02:50:16,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:50:16,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-07-21 02:50:16,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-07-21 02:50:16,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 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) [2022-07-21 02:50:16,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2022-07-21 02:50:16,184 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2022-07-21 02:50:16,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:50:16,185 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2022-07-21 02:50:16,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-07-21 02:50:16,186 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2022-07-21 02:50:16,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 02:50:16,186 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:50:16,186 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:50:16,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 02:50:16,187 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:50:16,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:50:16,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1809186766, now seen corresponding path program 1 times [2022-07-21 02:50:16,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:50:16,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898304817] [2022-07-21 02:50:16,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:50:16,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:50:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:50:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:50:16,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:50:16,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898304817] [2022-07-21 02:50:16,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898304817] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:50:16,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:50:16,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 02:50:16,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592430618] [2022-07-21 02:50:16,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:50:16,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 02:50:16,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:50:16,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 02:50:16,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:50:16,284 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-07-21 02:50:16,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:50:16,312 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2022-07-21 02:50:16,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 02:50:16,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2022-07-21 02:50:16,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:50:16,313 INFO L225 Difference]: With dead ends: 18 [2022-07-21 02:50:16,313 INFO L226 Difference]: Without dead ends: 11 [2022-07-21 02:50:16,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:50:16,315 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:50:16,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 13 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:50:16,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-07-21 02:50:16,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-07-21 02:50:16,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:50:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-07-21 02:50:16,318 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2022-07-21 02:50:16,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:50:16,319 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-07-21 02:50:16,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-07-21 02:50:16,319 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-07-21 02:50:16,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 02:50:16,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:50:16,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:50:16,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 02:50:16,320 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:50:16,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:50:16,321 INFO L85 PathProgramCache]: Analyzing trace with hash 576672011, now seen corresponding path program 1 times [2022-07-21 02:50:16,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:50:16,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640568308] [2022-07-21 02:50:16,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:50:16,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:50:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:50:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:50:16,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:50:16,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640568308] [2022-07-21 02:50:16,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640568308] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:50:16,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150738982] [2022-07-21 02:50:16,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:50:16,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:50:16,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:50:16,359 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) [2022-07-21 02:50:16,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 02:50:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:50:16,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 02:50:16,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:50:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:50:16,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:50:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:50:16,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150738982] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:50:16,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:50:16,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-21 02:50:16,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19673127] [2022-07-21 02:50:16,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:50:16,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 02:50:16,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:50:16,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 02:50:16,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-21 02:50:16,458 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-07-21 02:50:16,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:50:16,485 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2022-07-21 02:50:16,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 02:50:16,485 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 9 [2022-07-21 02:50:16,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:50:16,486 INFO L225 Difference]: With dead ends: 22 [2022-07-21 02:50:16,486 INFO L226 Difference]: Without dead ends: 15 [2022-07-21 02:50:16,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-21 02:50:16,487 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:50:16,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 16 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:50:16,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-21 02:50:16,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-07-21 02:50:16,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2022-07-21 02:50:16,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-07-21 02:50:16,491 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2022-07-21 02:50:16,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:50:16,491 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-07-21 02:50:16,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-07-21 02:50:16,492 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-07-21 02:50:16,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 02:50:16,492 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:50:16,492 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:50:16,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 02:50:16,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:50:16,706 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:50:16,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:50:16,707 INFO L85 PathProgramCache]: Analyzing trace with hash 571958019, now seen corresponding path program 1 times [2022-07-21 02:50:16,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:50:16,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417484699] [2022-07-21 02:50:16,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:50:16,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:50:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:50:16,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:50:16,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:50:16,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417484699] [2022-07-21 02:50:16,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417484699] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:50:16,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866814589] [2022-07-21 02:50:16,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:50:16,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:50:16,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:50:16,774 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) [2022-07-21 02:50:16,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 02:50:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:50:16,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 02:50:16,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:50:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:50:16,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:50:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:50:16,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866814589] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:50:16,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:50:16,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-07-21 02:50:16,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340881847] [2022-07-21 02:50:16,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:50:16,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 02:50:16,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:50:16,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 02:50:16,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-21 02:50:16,908 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) [2022-07-21 02:50:16,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:50:16,961 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2022-07-21 02:50:16,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 02:50:16,963 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) Word has length 13 [2022-07-21 02:50:16,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:50:16,964 INFO L225 Difference]: With dead ends: 30 [2022-07-21 02:50:16,964 INFO L226 Difference]: Without dead ends: 22 [2022-07-21 02:50:16,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-21 02:50:16,966 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:50:16,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:50:16,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-21 02:50:16,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-21 02:50:16,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:50:16,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-07-21 02:50:16,970 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2022-07-21 02:50:16,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:50:16,971 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-07-21 02:50:16,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) [2022-07-21 02:50:16,971 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-07-21 02:50:16,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 02:50:16,972 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:50:16,972 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:50:16,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 02:50:17,187 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,SelfDestructingSolverStorable3 [2022-07-21 02:50:17,188 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:50:17,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:50:17,188 INFO L85 PathProgramCache]: Analyzing trace with hash -870720137, now seen corresponding path program 2 times [2022-07-21 02:50:17,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:50:17,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547176253] [2022-07-21 02:50:17,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:50:17,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:50:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:50:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:50:17,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:50:17,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547176253] [2022-07-21 02:50:17,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547176253] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:50:17,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015901635] [2022-07-21 02:50:17,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:50:17,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:50:17,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:50:17,301 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) [2022-07-21 02:50:17,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 02:50:17,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:50:17,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:50:17,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 02:50:17,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:50:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:50:17,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:50:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:50:17,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015901635] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:50:17,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:50:17,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-07-21 02:50:17,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884220466] [2022-07-21 02:50:17,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:50:17,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 02:50:17,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:50:17,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 02:50:17,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-07-21 02:50:17,527 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 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) [2022-07-21 02:50:17,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:50:17,610 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-07-21 02:50:17,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 02:50:17,610 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 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 [2022-07-21 02:50:17,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:50:17,613 INFO L225 Difference]: With dead ends: 46 [2022-07-21 02:50:17,613 INFO L226 Difference]: Without dead ends: 38 [2022-07-21 02:50:17,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-07-21 02:50:17,616 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:50:17,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:50:17,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-21 02:50:17,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-21 02:50:17,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 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) [2022-07-21 02:50:17,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-07-21 02:50:17,627 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 21 [2022-07-21 02:50:17,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:50:17,628 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-07-21 02:50:17,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 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) [2022-07-21 02:50:17,628 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-07-21 02:50:17,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 02:50:17,629 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:50:17,629 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:50:17,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 02:50:17,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:50:17,848 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:50:17,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:50:17,848 INFO L85 PathProgramCache]: Analyzing trace with hash 114013791, now seen corresponding path program 3 times [2022-07-21 02:50:17,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:50:17,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559392043] [2022-07-21 02:50:17,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:50:17,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:50:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:50:18,060 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:50:18,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:50:18,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559392043] [2022-07-21 02:50:18,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559392043] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:50:18,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875305475] [2022-07-21 02:50:18,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:50:18,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:50:18,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:50:18,066 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) [2022-07-21 02:50:18,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 02:50:18,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 02:50:18,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:50:18,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 02:50:18,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:50:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-07-21 02:50:18,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 02:50:18,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875305475] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:50:18,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 02:50:18,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [17] total 19 [2022-07-21 02:50:18,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168927431] [2022-07-21 02:50:18,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:50:18,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 02:50:18,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:50:18,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 02:50:18,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-07-21 02:50:18,249 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-07-21 02:50:18,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:50:18,264 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-07-21 02:50:18,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 02:50:18,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 [2022-07-21 02:50:18,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:50:18,265 INFO L225 Difference]: With dead ends: 46 [2022-07-21 02:50:18,265 INFO L226 Difference]: Without dead ends: 42 [2022-07-21 02:50:18,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-07-21 02:50:18,266 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:50:18,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 17 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:50:18,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-21 02:50:18,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-07-21 02:50:18,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:50:18,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-07-21 02:50:18,273 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2022-07-21 02:50:18,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:50:18,274 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-07-21 02:50:18,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-07-21 02:50:18,274 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-07-21 02:50:18,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-21 02:50:18,275 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:50:18,275 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:50:18,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 02:50:18,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:50:18,496 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:50:18,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:50:18,496 INFO L85 PathProgramCache]: Analyzing trace with hash -2048604129, now seen corresponding path program 1 times [2022-07-21 02:50:18,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:50:18,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432000646] [2022-07-21 02:50:18,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:50:18,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:50:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:50:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 02:50:18,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:50:18,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432000646] [2022-07-21 02:50:18,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432000646] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:50:18,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701905860] [2022-07-21 02:50:18,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:50:18,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:50:18,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:50:18,680 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) [2022-07-21 02:50:18,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 02:50:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:50:18,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 02:50:18,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:50:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 02:50:18,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:50:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 02:50:19,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701905860] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:50:19,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:50:19,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-07-21 02:50:19,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555396490] [2022-07-21 02:50:19,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:50:19,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 02:50:19,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:50:19,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 02:50:19,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 02:50:19,149 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 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) [2022-07-21 02:50:19,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:50:19,251 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2022-07-21 02:50:19,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 02:50:19,252 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-21 02:50:19,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:50:19,254 INFO L225 Difference]: With dead ends: 82 [2022-07-21 02:50:19,254 INFO L226 Difference]: Without dead ends: 72 [2022-07-21 02:50:19,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 02:50:19,257 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:50:19,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:50:19,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-21 02:50:19,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-07-21 02:50:19,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 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) [2022-07-21 02:50:19,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2022-07-21 02:50:19,276 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 39 [2022-07-21 02:50:19,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:50:19,277 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2022-07-21 02:50:19,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 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) [2022-07-21 02:50:19,277 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2022-07-21 02:50:19,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-21 02:50:19,278 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:50:19,278 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:50:19,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-21 02:50:19,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:50:19,483 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:50:19,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:50:19,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1608701423, now seen corresponding path program 2 times [2022-07-21 02:50:19,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:50:19,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168725327] [2022-07-21 02:50:19,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:50:19,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:50:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:50:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 02:50:19,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:50:19,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168725327] [2022-07-21 02:50:19,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168725327] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:50:19,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367979216] [2022-07-21 02:50:19,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:50:19,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:50:19,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:50:19,992 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) [2022-07-21 02:50:20,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 02:50:20,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:50:20,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:50:20,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 02:50:20,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:50:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 02:50:20,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:50:21,271 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 02:50:21,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367979216] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:50:21,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:50:21,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-07-21 02:50:21,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134984070] [2022-07-21 02:50:21,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:50:21,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-21 02:50:21,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:50:21,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-21 02:50:21,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-07-21 02:50:21,275 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 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) [2022-07-21 02:50:21,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:50:21,474 INFO L93 Difference]: Finished difference Result 146 states and 182 transitions. [2022-07-21 02:50:21,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-21 02:50:21,474 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 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 71 [2022-07-21 02:50:21,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:50:21,479 INFO L225 Difference]: With dead ends: 146 [2022-07-21 02:50:21,479 INFO L226 Difference]: Without dead ends: 136 [2022-07-21 02:50:21,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-07-21 02:50:21,481 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:50:21,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:50:21,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-07-21 02:50:21,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-07-21 02:50:21,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 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) [2022-07-21 02:50:21,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2022-07-21 02:50:21,505 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 71 [2022-07-21 02:50:21,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:50:21,505 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2022-07-21 02:50:21,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 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) [2022-07-21 02:50:21,506 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2022-07-21 02:50:21,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-21 02:50:21,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:50:21,507 INFO L195 NwaCegarLoop]: trace histogram [63, 62, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:50:21,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-21 02:50:21,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:50:21,731 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:50:21,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:50:21,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1000525425, now seen corresponding path program 3 times [2022-07-21 02:50:21,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:50:21,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959468047] [2022-07-21 02:50:21,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:50:21,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:50:21,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:50:23,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3972 backedges. 63 proven. 3906 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 02:50:23,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:50:23,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959468047] [2022-07-21 02:50:23,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959468047] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:50:23,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028091389] [2022-07-21 02:50:23,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:50:23,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:50:23,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:50:23,256 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) [2022-07-21 02:50:23,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 02:50:23,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 02:50:23,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:50:23,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 02:50:23,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:50:23,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3972 backedges. 63 proven. 3 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2022-07-21 02:50:23,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:50:23,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3972 backedges. 63 proven. 3 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2022-07-21 02:50:23,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028091389] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:50:23,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:50:23,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 5, 5] total 71 [2022-07-21 02:50:23,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237185339] [2022-07-21 02:50:23,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:50:23,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-21 02:50:23,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:50:23,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-21 02:50:23,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2107, Invalid=2863, Unknown=0, NotChecked=0, Total=4970 [2022-07-21 02:50:23,910 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand has 71 states, 71 states have (on average 2.112676056338028) internal successors, (150), 71 states have internal predecessors, (150), 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) [2022-07-21 02:50:25,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:50:25,916 INFO L93 Difference]: Finished difference Result 154 states and 164 transitions. [2022-07-21 02:50:25,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-21 02:50:25,917 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.112676056338028) internal successors, (150), 71 states have internal predecessors, (150), 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 135 [2022-07-21 02:50:25,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:50:25,918 INFO L225 Difference]: With dead ends: 154 [2022-07-21 02:50:25,918 INFO L226 Difference]: Without dead ends: 144 [2022-07-21 02:50:25,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=6454, Invalid=11368, Unknown=0, NotChecked=0, Total=17822 [2022-07-21 02:50:25,924 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 69 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:50:25,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 45 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:50:25,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-21 02:50:25,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2022-07-21 02:50:25,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0212765957446808) internal successors, (144), 141 states have internal predecessors, (144), 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) [2022-07-21 02:50:25,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2022-07-21 02:50:25,935 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 135 [2022-07-21 02:50:25,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:50:25,936 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2022-07-21 02:50:25,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.112676056338028) internal successors, (150), 71 states have internal predecessors, (150), 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) [2022-07-21 02:50:25,936 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2022-07-21 02:50:25,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-21 02:50:25,937 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:50:25,938 INFO L195 NwaCegarLoop]: trace histogram [64, 63, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:50:25,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 02:50:26,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:50:26,160 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:50:26,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:50:26,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1372821556, now seen corresponding path program 4 times [2022-07-21 02:50:26,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:50:26,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635546832] [2022-07-21 02:50:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:50:26,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:50:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:50:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4117 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-21 02:50:27,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:50:27,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635546832] [2022-07-21 02:50:27,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635546832] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:50:27,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937254455] [2022-07-21 02:50:27,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:50:27,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:50:27,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:50:27,716 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) [2022-07-21 02:50:27,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 02:50:27,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:50:27,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:50:27,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-21 02:50:27,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:50:27,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4117 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-21 02:50:27,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:50:31,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4117 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-21 02:50:31,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937254455] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:50:31,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:50:31,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 131 [2022-07-21 02:50:31,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876440876] [2022-07-21 02:50:31,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:50:31,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-07-21 02:50:31,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:50:31,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-07-21 02:50:31,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2022-07-21 02:50:31,861 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 131 states, 131 states have (on average 2.045801526717557) internal successors, (268), 131 states have internal predecessors, (268), 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) [2022-07-21 02:50:32,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:50:32,253 INFO L93 Difference]: Finished difference Result 286 states and 355 transitions. [2022-07-21 02:50:32,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-07-21 02:50:32,254 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.045801526717557) internal successors, (268), 131 states have internal predecessors, (268), 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 141 [2022-07-21 02:50:32,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:50:32,255 INFO L225 Difference]: With dead ends: 286 [2022-07-21 02:50:32,255 INFO L226 Difference]: Without dead ends: 272 [2022-07-21 02:50:32,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2022-07-21 02:50:32,259 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:50:32,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 02:50:32,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-07-21 02:50:32,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2022-07-21 02:50:32,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.011070110701107) internal successors, (274), 271 states have internal predecessors, (274), 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) [2022-07-21 02:50:32,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 274 transitions. [2022-07-21 02:50:32,277 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 274 transitions. Word has length 141 [2022-07-21 02:50:32,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:50:32,277 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 274 transitions. [2022-07-21 02:50:32,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.045801526717557) internal successors, (268), 131 states have internal predecessors, (268), 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) [2022-07-21 02:50:32,278 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 274 transitions. [2022-07-21 02:50:32,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-07-21 02:50:32,281 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:50:32,281 INFO L195 NwaCegarLoop]: trace histogram [129, 128, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:50:32,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 02:50:32,495 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,SelfDestructingSolverStorable9 [2022-07-21 02:50:32,496 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:50:32,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:50:32,496 INFO L85 PathProgramCache]: Analyzing trace with hash 2118041225, now seen corresponding path program 5 times [2022-07-21 02:50:32,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:50:32,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241546949] [2022-07-21 02:50:32,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:50:32,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:50:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:50:37,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16662 backedges. 129 proven. 16512 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-21 02:50:37,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:50:37,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241546949] [2022-07-21 02:50:37,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241546949] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:50:37,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773658719] [2022-07-21 02:50:37,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:50:37,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:50:37,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:50:37,798 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) [2022-07-21 02:50:37,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 02:50:37,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 130 check-sat command(s) [2022-07-21 02:50:37,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:50:37,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 130 conjunts are in the unsatisfiable core [2022-07-21 02:50:37,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:50:38,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16662 backedges. 129 proven. 16512 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-21 02:50:38,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:50:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16662 backedges. 129 proven. 16512 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-21 02:50:53,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773658719] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:50:53,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:50:53,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131, 131] total 261 [2022-07-21 02:50:53,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653042310] [2022-07-21 02:50:53,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:50:53,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 261 states [2022-07-21 02:50:53,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:50:53,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 261 interpolants. [2022-07-21 02:50:53,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33930, Invalid=33930, Unknown=0, NotChecked=0, Total=67860 [2022-07-21 02:50:53,626 INFO L87 Difference]: Start difference. First operand 272 states and 274 transitions. Second operand has 261 states, 261 states have (on average 2.0229885057471266) internal successors, (528), 261 states have internal predecessors, (528), 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) [2022-07-21 02:50:54,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:50:54,649 INFO L93 Difference]: Finished difference Result 546 states and 680 transitions. [2022-07-21 02:50:54,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2022-07-21 02:50:54,650 INFO L78 Accepts]: Start accepts. Automaton has has 261 states, 261 states have (on average 2.0229885057471266) internal successors, (528), 261 states have internal predecessors, (528), 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 271 [2022-07-21 02:50:54,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:50:54,652 INFO L225 Difference]: With dead ends: 546 [2022-07-21 02:50:54,652 INFO L226 Difference]: Without dead ends: 532 [2022-07-21 02:50:54,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=33930, Invalid=33930, Unknown=0, NotChecked=0, Total=67860 [2022-07-21 02:50:54,656 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 02:50:54,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 02:50:54,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-07-21 02:50:54,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 532. [2022-07-21 02:50:54,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 1.0056497175141244) internal successors, (534), 531 states have internal predecessors, (534), 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) [2022-07-21 02:50:54,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 534 transitions. [2022-07-21 02:50:54,687 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 534 transitions. Word has length 271 [2022-07-21 02:50:54,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:50:54,688 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 534 transitions. [2022-07-21 02:50:54,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 261 states, 261 states have (on average 2.0229885057471266) internal successors, (528), 261 states have internal predecessors, (528), 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) [2022-07-21 02:50:54,689 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 534 transitions. [2022-07-21 02:50:54,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2022-07-21 02:50:54,696 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:50:54,696 INFO L195 NwaCegarLoop]: trace histogram [259, 258, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:50:54,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-21 02:50:54,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:50:54,920 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:50:54,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:50:54,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1610521155, now seen corresponding path program 6 times [2022-07-21 02:50:54,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:50:54,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195497841] [2022-07-21 02:50:54,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:50:54,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:50:55,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:51:15,367 INFO L134 CoverageAnalysis]: Checked inductivity of 67102 backedges. 259 proven. 66822 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-21 02:51:15,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:51:15,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195497841] [2022-07-21 02:51:15,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195497841] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:51:15,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236018581] [2022-07-21 02:51:15,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:51:15,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:51:15,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:51:15,372 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) [2022-07-21 02:51:15,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 02:51:15,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-21 02:51:15,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:51:15,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 02:51:15,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:51:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 67102 backedges. 774 proven. 1 refuted. 0 times theorem prover too weak. 66327 trivial. 0 not checked. [2022-07-21 02:51:15,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:51:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 67102 backedges. 774 proven. 1 refuted. 0 times theorem prover too weak. 66327 trivial. 0 not checked. [2022-07-21 02:51:16,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236018581] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:51:16,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:51:16,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [261, 4, 4] total 265 [2022-07-21 02:51:16,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697718843] [2022-07-21 02:51:16,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:51:16,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 265 states [2022-07-21 02:51:16,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:51:16,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 265 interpolants. [2022-07-21 02:51:16,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34980, Invalid=34980, Unknown=0, NotChecked=0, Total=69960 [2022-07-21 02:51:16,166 INFO L87 Difference]: Start difference. First operand 532 states and 534 transitions. Second operand has 265 states, 265 states have (on average 2.026415094339623) internal successors, (537), 265 states have internal predecessors, (537), 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) [2022-07-21 02:51:17,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:51:17,445 INFO L93 Difference]: Finished difference Result 554 states and 565 transitions. [2022-07-21 02:51:17,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 265 states. [2022-07-21 02:51:17,445 INFO L78 Accepts]: Start accepts. Automaton has has 265 states, 265 states have (on average 2.026415094339623) internal successors, (537), 265 states have internal predecessors, (537), 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 531 [2022-07-21 02:51:17,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:51:17,449 INFO L225 Difference]: With dead ends: 554 [2022-07-21 02:51:17,449 INFO L226 Difference]: Without dead ends: 540 [2022-07-21 02:51:17,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1321 GetRequests, 1058 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=34980, Invalid=34980, Unknown=0, NotChecked=0, Total=69960 [2022-07-21 02:51:17,453 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 524 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 02:51:17,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 28 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 02:51:17,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-07-21 02:51:17,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2022-07-21 02:51:17,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 1.0111317254174397) internal successors, (545), 539 states have internal predecessors, (545), 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) [2022-07-21 02:51:17,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 545 transitions. [2022-07-21 02:51:17,488 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 545 transitions. Word has length 531 [2022-07-21 02:51:17,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:51:17,489 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 545 transitions. [2022-07-21 02:51:17,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 265 states, 265 states have (on average 2.026415094339623) internal successors, (537), 265 states have internal predecessors, (537), 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) [2022-07-21 02:51:17,490 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 545 transitions. [2022-07-21 02:51:17,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2022-07-21 02:51:17,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:51:17,499 INFO L195 NwaCegarLoop]: trace histogram [263, 259, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:51:17,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 02:51:17,719 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,SelfDestructingSolverStorable11 [2022-07-21 02:51:17,719 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:51:17,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:51:17,720 INFO L85 PathProgramCache]: Analyzing trace with hash -2107211535, now seen corresponding path program 7 times [2022-07-21 02:51:17,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:51:17,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269647333] [2022-07-21 02:51:17,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:51:17,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:51:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:51:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 69190 backedges. 1820 proven. 67340 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-21 02:51:38,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:51:38,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269647333] [2022-07-21 02:51:38,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269647333] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:51:38,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076418181] [2022-07-21 02:51:38,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:51:38,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:51:38,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:51:38,500 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) [2022-07-21 02:51:38,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 02:51:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:51:38,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 261 conjunts are in the unsatisfiable core [2022-07-21 02:51:38,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:51:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 69190 backedges. 1820 proven. 67340 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-21 02:51:39,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:52:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 69190 backedges. 1820 proven. 67340 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-21 02:52:41,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076418181] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:52:41,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:52:41,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [262, 262, 262] total 523 [2022-07-21 02:52:41,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780019957] [2022-07-21 02:52:41,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:52:41,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 523 states [2022-07-21 02:52:41,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:52:41,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 523 interpolants. [2022-07-21 02:52:41,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136503, Invalid=136503, Unknown=0, NotChecked=0, Total=273006 [2022-07-21 02:52:41,282 INFO L87 Difference]: Start difference. First operand 540 states and 545 transitions. Second operand has 523 states, 523 states have (on average 2.0152963671128106) internal successors, (1054), 523 states have internal predecessors, (1054), 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) [2022-07-21 02:52:45,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:52:45,616 INFO L93 Difference]: Finished difference Result 1082 states and 1353 transitions. [2022-07-21 02:52:45,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 522 states. [2022-07-21 02:52:45,617 INFO L78 Accepts]: Start accepts. Automaton has has 523 states, 523 states have (on average 2.0152963671128106) internal successors, (1054), 523 states have internal predecessors, (1054), 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 539 [2022-07-21 02:52:45,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:52:45,620 INFO L225 Difference]: With dead ends: 1082 [2022-07-21 02:52:45,621 INFO L226 Difference]: Without dead ends: 1062 [2022-07-21 02:52:45,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1338 GetRequests, 817 SyntacticMatches, 0 SemanticMatches, 521 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 81.4s TimeCoverageRelationStatistics Valid=136503, Invalid=136503, Unknown=0, NotChecked=0, Total=273006 [2022-07-21 02:52:45,633 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 02:52:45,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-21 02:52:45,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2022-07-21 02:52:45,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 1062. [2022-07-21 02:52:45,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1061 states have (on average 1.0056550424128181) internal successors, (1067), 1061 states have internal predecessors, (1067), 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) [2022-07-21 02:52:45,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1067 transitions. [2022-07-21 02:52:45,679 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1067 transitions. Word has length 539 [2022-07-21 02:52:45,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:52:45,680 INFO L495 AbstractCegarLoop]: Abstraction has 1062 states and 1067 transitions. [2022-07-21 02:52:45,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 523 states, 523 states have (on average 2.0152963671128106) internal successors, (1054), 523 states have internal predecessors, (1054), 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) [2022-07-21 02:52:45,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1067 transitions. [2022-07-21 02:52:45,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1062 [2022-07-21 02:52:45,688 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:52:45,689 INFO L195 NwaCegarLoop]: trace histogram [524, 520, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:52:45,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 02:52:45,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 02:52:45,891 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:52:45,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:52:45,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1707818718, now seen corresponding path program 8 times [2022-07-21 02:52:45,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:52:45,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083913721] [2022-07-21 02:52:45,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:52:45,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:52:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat