./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/skipped.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/array-tiling/skipped.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 0c36d485530e5f36dabf3b382821b7ad25023b1cbf4cb81b13349652fc8273f7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 21:15:00,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 21:15:00,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 21:15:00,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 21:15:00,950 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 21:15:00,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 21:15:00,954 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 21:15:00,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 21:15:00,958 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 21:15:00,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 21:15:00,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 21:15:00,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 21:15:00,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 21:15:00,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 21:15:00,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 21:15:00,971 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 21:15:00,972 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 21:15:00,973 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 21:15:00,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 21:15:00,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 21:15:00,982 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 21:15:00,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 21:15:00,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 21:15:00,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 21:15:00,987 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 21:15:00,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 21:15:00,994 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 21:15:00,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 21:15:00,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 21:15:00,996 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 21:15:00,997 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 21:15:00,998 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 21:15:00,999 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 21:15:01,000 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 21:15:01,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 21:15:01,001 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 21:15:01,002 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 21:15:01,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 21:15:01,003 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 21:15:01,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 21:15:01,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 21:15:01,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 21:15:01,007 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 21:15:01,034 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 21:15:01,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 21:15:01,035 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 21:15:01,036 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 21:15:01,036 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 21:15:01,037 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 21:15:01,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 21:15:01,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 21:15:01,038 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 21:15:01,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 21:15:01,039 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 21:15:01,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 21:15:01,039 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 21:15:01,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 21:15:01,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 21:15:01,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 21:15:01,040 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 21:15:01,040 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 21:15:01,040 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 21:15:01,041 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 21:15:01,041 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 21:15:01,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 21:15:01,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 21:15:01,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 21:15:01,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:15:01,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 21:15:01,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 21:15:01,042 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 21:15:01,042 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 21:15:01,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 21:15:01,043 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 21:15:01,043 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 21:15:01,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 21:15:01,044 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0c36d485530e5f36dabf3b382821b7ad25023b1cbf4cb81b13349652fc8273f7 [2022-07-20 21:15:01,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 21:15:01,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 21:15:01,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 21:15:01,348 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 21:15:01,349 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 21:15:01,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/skipped.c [2022-07-20 21:15:01,406 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a492324f6/73c5fb91f511420293a18deadff73c78/FLAG198a7d7a4 [2022-07-20 21:15:01,782 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 21:15:01,782 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/skipped.c [2022-07-20 21:15:01,797 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a492324f6/73c5fb91f511420293a18deadff73c78/FLAG198a7d7a4 [2022-07-20 21:15:02,187 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a492324f6/73c5fb91f511420293a18deadff73c78 [2022-07-20 21:15:02,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 21:15:02,193 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 21:15:02,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 21:15:02,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 21:15:02,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 21:15:02,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:15:02" (1/1) ... [2022-07-20 21:15:02,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@788bb1a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:02, skipping insertion in model container [2022-07-20 21:15:02,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:15:02" (1/1) ... [2022-07-20 21:15:02,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 21:15:02,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 21:15:02,358 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/skipped.c[398,411] [2022-07-20 21:15:02,393 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:15:02,404 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 21:15:02,419 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/skipped.c[398,411] [2022-07-20 21:15:02,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:15:02,448 INFO L208 MainTranslator]: Completed translation [2022-07-20 21:15:02,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:02 WrapperNode [2022-07-20 21:15:02,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 21:15:02,456 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 21:15:02,457 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 21:15:02,457 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 21:15:02,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:02" (1/1) ... [2022-07-20 21:15:02,479 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:02" (1/1) ... [2022-07-20 21:15:02,499 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2022-07-20 21:15:02,499 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 21:15:02,500 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 21:15:02,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 21:15:02,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 21:15:02,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:02" (1/1) ... [2022-07-20 21:15:02,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:02" (1/1) ... [2022-07-20 21:15:02,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:02" (1/1) ... [2022-07-20 21:15:02,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:02" (1/1) ... [2022-07-20 21:15:02,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:02" (1/1) ... [2022-07-20 21:15:02,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:02" (1/1) ... [2022-07-20 21:15:02,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:02" (1/1) ... [2022-07-20 21:15:02,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 21:15:02,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 21:15:02,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 21:15:02,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 21:15:02,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:02" (1/1) ... [2022-07-20 21:15:02,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:15:02,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:02,552 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) [2022-07-20 21:15:02,559 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 [2022-07-20 21:15:02,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 21:15:02,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 21:15:02,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 21:15:02,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 21:15:02,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 21:15:02,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 21:15:02,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 21:15:02,654 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 21:15:02,656 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 21:15:02,867 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 21:15:02,872 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 21:15:02,887 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-20 21:15:02,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:15:02 BoogieIcfgContainer [2022-07-20 21:15:02,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 21:15:02,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 21:15:02,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 21:15:02,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 21:15:02,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:15:02" (1/3) ... [2022-07-20 21:15:02,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ebad570 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:15:02, skipping insertion in model container [2022-07-20 21:15:02,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:02" (2/3) ... [2022-07-20 21:15:02,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ebad570 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:15:02, skipping insertion in model container [2022-07-20 21:15:02,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:15:02" (3/3) ... [2022-07-20 21:15:02,897 INFO L111 eAbstractionObserver]: Analyzing ICFG skipped.c [2022-07-20 21:15:02,910 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 21:15:02,927 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 21:15:02,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 21:15:02,992 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@6480b51d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1d18cc25 [2022-07-20 21:15:02,992 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 21:15:03,001 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:03,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 21:15:03,006 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:03,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:03,008 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:03,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:03,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1607783550, now seen corresponding path program 1 times [2022-07-20 21:15:03,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:03,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917409050] [2022-07-20 21:15:03,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:03,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:03,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:03,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:03,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917409050] [2022-07-20 21:15:03,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917409050] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:15:03,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:15:03,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 21:15:03,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704145357] [2022-07-20 21:15:03,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:15:03,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 21:15:03,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:03,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 21:15:03,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:15:03,230 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:03,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:03,242 INFO L93 Difference]: Finished difference Result 43 states and 62 transitions. [2022-07-20 21:15:03,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 21:15:03,244 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-20 21:15:03,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:03,250 INFO L225 Difference]: With dead ends: 43 [2022-07-20 21:15:03,250 INFO L226 Difference]: Without dead ends: 20 [2022-07-20 21:15:03,253 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 [2022-07-20 21:15:03,256 INFO L413 NwaCegarLoop]: 30 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, 30 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 [2022-07-20 21:15:03,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:15:03,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-20 21:15:03,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-07-20 21:15:03,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2022-07-20 21:15:03,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-07-20 21:15:03,281 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2022-07-20 21:15:03,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:03,282 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-07-20 21:15:03,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:03,283 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-07-20 21:15:03,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 21:15:03,284 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:03,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:03,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 21:15:03,284 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:03,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:03,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1872951298, now seen corresponding path program 1 times [2022-07-20 21:15:03,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:03,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76213163] [2022-07-20 21:15:03,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:03,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:03,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:03,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76213163] [2022-07-20 21:15:03,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76213163] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:15:03,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:15:03,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:15:03,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863721195] [2022-07-20 21:15:03,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:15:03,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:15:03,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:03,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:15:03,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:15:03,366 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:03,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:03,413 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2022-07-20 21:15:03,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:15:03,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-20 21:15:03,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:03,415 INFO L225 Difference]: With dead ends: 37 [2022-07-20 21:15:03,416 INFO L226 Difference]: Without dead ends: 22 [2022-07-20 21:15:03,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:15:03,418 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:03,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:15:03,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-20 21:15:03,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-07-20 21:15:03,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:03,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-07-20 21:15:03,426 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2022-07-20 21:15:03,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:03,426 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-07-20 21:15:03,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:03,427 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-07-20 21:15:03,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-20 21:15:03,427 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:03,427 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:03,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 21:15:03,428 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:03,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:03,429 INFO L85 PathProgramCache]: Analyzing trace with hash -270152420, now seen corresponding path program 1 times [2022-07-20 21:15:03,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:03,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215497148] [2022-07-20 21:15:03,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:03,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:03,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:03,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215497148] [2022-07-20 21:15:03,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215497148] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:03,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610563710] [2022-07-20 21:15:03,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:03,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:03,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:03,485 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) [2022-07-20 21:15:03,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 21:15:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:03,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:15:03,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:03,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:03,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:03,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610563710] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:03,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:03,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-20 21:15:03,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715842075] [2022-07-20 21:15:03,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:03,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 21:15:03,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:03,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 21:15:03,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-20 21:15:03,623 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:03,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:03,672 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-07-20 21:15:03,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 21:15:03,672 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-20 21:15:03,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:03,673 INFO L225 Difference]: With dead ends: 39 [2022-07-20 21:15:03,673 INFO L226 Difference]: Without dead ends: 24 [2022-07-20 21:15:03,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-20 21:15:03,675 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:03,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 32 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:15:03,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-20 21:15:03,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-07-20 21:15:03,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:03,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-20 21:15:03,680 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2022-07-20 21:15:03,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:03,681 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-20 21:15:03,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:03,681 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-20 21:15:03,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 21:15:03,682 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:03,682 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:03,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-20 21:15:03,908 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 [2022-07-20 21:15:03,908 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:03,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:03,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1873689926, now seen corresponding path program 2 times [2022-07-20 21:15:03,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:03,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794652417] [2022-07-20 21:15:03,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:03,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:15:04,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:04,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794652417] [2022-07-20 21:15:04,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794652417] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:15:04,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:15:04,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 21:15:04,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677865578] [2022-07-20 21:15:04,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:15:04,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 21:15:04,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:04,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 21:15:04,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:15:04,033 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-07-20 21:15:04,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:04,081 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-07-20 21:15:04,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 21:15:04,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 16 [2022-07-20 21:15:04,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:04,083 INFO L225 Difference]: With dead ends: 35 [2022-07-20 21:15:04,083 INFO L226 Difference]: Without dead ends: 28 [2022-07-20 21:15:04,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:15:04,087 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:04,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 18 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:15:04,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-20 21:15:04,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2022-07-20 21:15:04,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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) [2022-07-20 21:15:04,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-07-20 21:15:04,092 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2022-07-20 21:15:04,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:04,093 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-07-20 21:15:04,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-07-20 21:15:04,093 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-07-20 21:15:04,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-20 21:15:04,094 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:04,094 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:04,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 21:15:04,094 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:04,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:04,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1095507628, now seen corresponding path program 1 times [2022-07-20 21:15:04,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:04,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107945213] [2022-07-20 21:15:04,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:04,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:15:04,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:04,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107945213] [2022-07-20 21:15:04,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107945213] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:04,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279523715] [2022-07-20 21:15:04,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:04,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:04,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:04,349 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) [2022-07-20 21:15:04,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 21:15:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:04,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 21:15:04,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:04,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:15:04,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:15:04,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 21:15:04,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 21:15:04,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:15:04,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:04,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-20 21:15:04,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-07-20 21:15:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:15:04,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279523715] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:04,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:04,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 12 [2022-07-20 21:15:04,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2819793] [2022-07-20 21:15:04,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:04,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 21:15:04,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:04,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 21:15:04,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-20 21:15:04,648 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:04,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:04,806 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-07-20 21:15:04,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 21:15:04,807 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-20 21:15:04,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:04,808 INFO L225 Difference]: With dead ends: 58 [2022-07-20 21:15:04,808 INFO L226 Difference]: Without dead ends: 56 [2022-07-20 21:15:04,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-07-20 21:15:04,809 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 79 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:04,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 90 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:15:04,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-20 21:15:04,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 33. [2022-07-20 21:15:04,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:04,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2022-07-20 21:15:04,816 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 21 [2022-07-20 21:15:04,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:04,816 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2022-07-20 21:15:04,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:04,817 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-07-20 21:15:04,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-20 21:15:04,826 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:04,826 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:04,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:05,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:05,051 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:05,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:05,051 INFO L85 PathProgramCache]: Analyzing trace with hash -415449258, now seen corresponding path program 1 times [2022-07-20 21:15:05,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:05,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473999510] [2022-07-20 21:15:05,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:05,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:05,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:15:05,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:05,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473999510] [2022-07-20 21:15:05,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473999510] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:05,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633815801] [2022-07-20 21:15:05,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:05,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:05,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:05,195 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) [2022-07-20 21:15:05,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 21:15:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:05,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 21:15:05,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:05,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:15:05,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 21:15:05,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 21:15:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:15:05,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:05,455 INFO L356 Elim1Store]: treesize reduction 8, result has 38.5 percent of original size [2022-07-20 21:15:05,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2022-07-20 21:15:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:15:05,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633815801] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:05,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:05,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 15 [2022-07-20 21:15:05,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074805399] [2022-07-20 21:15:05,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:05,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 21:15:05,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:05,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 21:15:05,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-07-20 21:15:05,468 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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) [2022-07-20 21:15:05,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:05,629 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-07-20 21:15:05,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 21:15:05,630 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-20 21:15:05,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:05,631 INFO L225 Difference]: With dead ends: 53 [2022-07-20 21:15:05,631 INFO L226 Difference]: Without dead ends: 51 [2022-07-20 21:15:05,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-07-20 21:15:05,632 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:05,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 57 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:15:05,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-20 21:15:05,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 26. [2022-07-20 21:15:05,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:05,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-07-20 21:15:05,636 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2022-07-20 21:15:05,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:05,636 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-07-20 21:15:05,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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) [2022-07-20 21:15:05,636 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-07-20 21:15:05,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-20 21:15:05,637 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:05,637 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:05,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:05,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:05,848 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:05,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:05,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1653781302, now seen corresponding path program 1 times [2022-07-20 21:15:05,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:05,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092038833] [2022-07-20 21:15:05,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:05,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:05,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:05,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:05,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092038833] [2022-07-20 21:15:05,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092038833] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:05,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230532305] [2022-07-20 21:15:05,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:05,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:05,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:05,971 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) [2022-07-20 21:15:05,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 21:15:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:06,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 21:15:06,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:06,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:15:06,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:15:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:15:06,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:06,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:15:06,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-20 21:15:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:15:06,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230532305] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:06,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:06,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 11 [2022-07-20 21:15:06,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793104258] [2022-07-20 21:15:06,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:06,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 21:15:06,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:06,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 21:15:06,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-20 21:15:06,227 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2022-07-20 21:15:06,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:06,411 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2022-07-20 21:15:06,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 21:15:06,411 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 25 [2022-07-20 21:15:06,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:06,412 INFO L225 Difference]: With dead ends: 63 [2022-07-20 21:15:06,412 INFO L226 Difference]: Without dead ends: 61 [2022-07-20 21:15:06,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-07-20 21:15:06,413 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 39 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:06,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 96 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:15:06,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-20 21:15:06,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2022-07-20 21:15:06,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:06,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2022-07-20 21:15:06,420 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 25 [2022-07-20 21:15:06,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:06,420 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2022-07-20 21:15:06,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2022-07-20 21:15:06,421 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2022-07-20 21:15:06,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-20 21:15:06,421 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:06,422 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:06,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:06,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:06,643 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:06,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:06,644 INFO L85 PathProgramCache]: Analyzing trace with hash -952716724, now seen corresponding path program 1 times [2022-07-20 21:15:06,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:06,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187647246] [2022-07-20 21:15:06,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:06,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:06,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:06,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187647246] [2022-07-20 21:15:06,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187647246] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:06,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563187891] [2022-07-20 21:15:06,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:06,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:06,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:06,780 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) [2022-07-20 21:15:06,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 21:15:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:06,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 21:15:06,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:06,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:15:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:15:06,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:07,013 INFO L356 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2022-07-20 21:15:07,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-07-20 21:15:07,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:15:07,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563187891] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:07,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:07,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 14 [2022-07-20 21:15:07,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891337756] [2022-07-20 21:15:07,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:07,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 21:15:07,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:07,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 21:15:07,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-07-20 21:15:07,035 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:07,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:07,200 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2022-07-20 21:15:07,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 21:15:07,201 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-20 21:15:07,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:07,201 INFO L225 Difference]: With dead ends: 53 [2022-07-20 21:15:07,201 INFO L226 Difference]: Without dead ends: 51 [2022-07-20 21:15:07,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-07-20 21:15:07,202 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:07,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 79 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:15:07,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-20 21:15:07,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2022-07-20 21:15:07,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:07,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-07-20 21:15:07,207 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 25 [2022-07-20 21:15:07,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:07,207 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-07-20 21:15:07,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:07,208 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-07-20 21:15:07,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 21:15:07,208 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:07,208 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:07,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:07,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:07,420 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:07,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:07,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1643646272, now seen corresponding path program 2 times [2022-07-20 21:15:07,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:07,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878805422] [2022-07-20 21:15:07,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:07,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:15:07,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:07,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878805422] [2022-07-20 21:15:07,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878805422] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:07,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936812915] [2022-07-20 21:15:07,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:15:07,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:07,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:07,494 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) [2022-07-20 21:15:07,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 21:15:07,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:15:07,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:07,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 21:15:07,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:15:07,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:07,674 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:15:07,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936812915] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:07,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:07,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-20 21:15:07,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359404829] [2022-07-20 21:15:07,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:07,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 21:15:07,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:07,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 21:15:07,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-20 21:15:07,677 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:07,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:07,817 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2022-07-20 21:15:07,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 21:15:07,818 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-20 21:15:07,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:07,818 INFO L225 Difference]: With dead ends: 88 [2022-07-20 21:15:07,819 INFO L226 Difference]: Without dead ends: 51 [2022-07-20 21:15:07,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-07-20 21:15:07,820 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 82 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:07,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 52 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:15:07,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-20 21:15:07,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2022-07-20 21:15:07,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:07,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-07-20 21:15:07,825 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 29 [2022-07-20 21:15:07,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:07,825 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-07-20 21:15:07,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:07,826 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-07-20 21:15:07,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-20 21:15:07,829 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:07,829 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:07,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:08,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:08,045 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:08,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:08,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1334470626, now seen corresponding path program 3 times [2022-07-20 21:15:08,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:08,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666624567] [2022-07-20 21:15:08,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:08,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 21:15:08,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:08,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666624567] [2022-07-20 21:15:08,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666624567] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:08,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899541063] [2022-07-20 21:15:08,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:15:08,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:08,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:08,222 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) [2022-07-20 21:15:08,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 21:15:08,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 21:15:08,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:08,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 21:15:08,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:08,501 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:15:08,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:15:08,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899541063] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:08,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:08,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 24 [2022-07-20 21:15:08,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697694266] [2022-07-20 21:15:08,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:08,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-20 21:15:08,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:08,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-20 21:15:08,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2022-07-20 21:15:08,624 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 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) [2022-07-20 21:15:08,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:08,957 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2022-07-20 21:15:08,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 21:15:08,957 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 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 31 [2022-07-20 21:15:08,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:08,958 INFO L225 Difference]: With dead ends: 62 [2022-07-20 21:15:08,958 INFO L226 Difference]: Without dead ends: 49 [2022-07-20 21:15:08,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=831, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 21:15:08,959 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 219 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:08,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 70 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:15:08,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-20 21:15:08,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2022-07-20 21:15:08,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:08,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-07-20 21:15:08,965 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 31 [2022-07-20 21:15:08,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:08,966 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-07-20 21:15:08,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 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) [2022-07-20 21:15:08,966 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-07-20 21:15:08,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-20 21:15:08,967 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:08,967 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:08,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-20 21:15:09,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:09,191 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:09,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:09,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1713959812, now seen corresponding path program 4 times [2022-07-20 21:15:09,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:09,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041386610] [2022-07-20 21:15:09,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:09,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 21:15:09,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:09,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041386610] [2022-07-20 21:15:09,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041386610] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:09,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932349028] [2022-07-20 21:15:09,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:15:09,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:09,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:09,432 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) [2022-07-20 21:15:09,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 21:15:09,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:15:09,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:09,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 21:15:09,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:09,621 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 21:15:09,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 21:15:09,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932349028] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:09,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:09,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2022-07-20 21:15:09,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8998421] [2022-07-20 21:15:09,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:09,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-20 21:15:09,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:09,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-20 21:15:09,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2022-07-20 21:15:09,816 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 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) [2022-07-20 21:15:10,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:10,060 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2022-07-20 21:15:10,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 21:15:10,060 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-20 21:15:10,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:10,061 INFO L225 Difference]: With dead ends: 76 [2022-07-20 21:15:10,061 INFO L226 Difference]: Without dead ends: 49 [2022-07-20 21:15:10,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2022-07-20 21:15:10,062 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 89 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:10,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 84 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:15:10,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-20 21:15:10,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 39. [2022-07-20 21:15:10,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:10,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-07-20 21:15:10,068 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 36 [2022-07-20 21:15:10,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:10,068 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-07-20 21:15:10,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 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) [2022-07-20 21:15:10,068 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-07-20 21:15:10,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-20 21:15:10,069 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:10,069 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:10,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:10,269 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,SelfDestructingSolverStorable10 [2022-07-20 21:15:10,270 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:10,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:10,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1453047458, now seen corresponding path program 5 times [2022-07-20 21:15:10,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:10,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159840974] [2022-07-20 21:15:10,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:10,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:10,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:10,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:10,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159840974] [2022-07-20 21:15:10,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159840974] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:10,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665241773] [2022-07-20 21:15:10,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:15:10,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:10,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:10,860 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) [2022-07-20 21:15:10,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 21:15:10,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-20 21:15:10,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:10,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-20 21:15:10,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:11,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:15:11,049 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:15:11,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 21:15:11,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:15:11,185 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 21:15:11,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:11,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:15:11,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-20 21:15:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 21:15:11,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665241773] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:11,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:11,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 9] total 29 [2022-07-20 21:15:11,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288347957] [2022-07-20 21:15:11,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:11,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-20 21:15:11,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:11,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-20 21:15:11,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2022-07-20 21:15:11,351 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 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) [2022-07-20 21:15:14,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:14,319 INFO L93 Difference]: Finished difference Result 265 states and 309 transitions. [2022-07-20 21:15:14,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-20 21:15:14,319 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 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 38 [2022-07-20 21:15:14,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:14,320 INFO L225 Difference]: With dead ends: 265 [2022-07-20 21:15:14,320 INFO L226 Difference]: Without dead ends: 263 [2022-07-20 21:15:14,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3308 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1423, Invalid=9083, Unknown=0, NotChecked=0, Total=10506 [2022-07-20 21:15:14,325 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 611 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:14,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 230 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 21:15:14,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-07-20 21:15:14,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 68. [2022-07-20 21:15:14,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 67 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:14,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2022-07-20 21:15:14,337 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 38 [2022-07-20 21:15:14,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:14,338 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2022-07-20 21:15:14,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 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) [2022-07-20 21:15:14,338 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2022-07-20 21:15:14,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-20 21:15:14,339 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:14,339 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:14,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:14,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:14,557 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:14,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:14,558 INFO L85 PathProgramCache]: Analyzing trace with hash -135300444, now seen corresponding path program 1 times [2022-07-20 21:15:14,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:14,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614751270] [2022-07-20 21:15:14,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:14,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:14,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:15,114 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:15,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:15,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614751270] [2022-07-20 21:15:15,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614751270] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:15,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839530544] [2022-07-20 21:15:15,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:15,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:15,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:15,120 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) [2022-07-20 21:15:15,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 21:15:15,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:15,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-20 21:15:15,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:15,332 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:15:15,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 21:15:15,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:15:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:15:15,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:15,611 INFO L356 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2022-07-20 21:15:15,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-07-20 21:15:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 21:15:15,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839530544] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:15,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:15,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 10] total 32 [2022-07-20 21:15:15,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702499834] [2022-07-20 21:15:15,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:15,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-20 21:15:15,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:15,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-20 21:15:15,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2022-07-20 21:15:15,636 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand has 32 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 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) [2022-07-20 21:15:17,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:17,626 INFO L93 Difference]: Finished difference Result 233 states and 281 transitions. [2022-07-20 21:15:17,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-20 21:15:17,627 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 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 38 [2022-07-20 21:15:17,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:17,628 INFO L225 Difference]: With dead ends: 233 [2022-07-20 21:15:17,628 INFO L226 Difference]: Without dead ends: 211 [2022-07-20 21:15:17,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1708 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=985, Invalid=5495, Unknown=0, NotChecked=0, Total=6480 [2022-07-20 21:15:17,630 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 382 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:17,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 203 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 21:15:17,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-07-20 21:15:17,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 60. [2022-07-20 21:15:17,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 59 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) [2022-07-20 21:15:17,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-07-20 21:15:17,641 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 38 [2022-07-20 21:15:17,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:17,642 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-07-20 21:15:17,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 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) [2022-07-20 21:15:17,642 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-07-20 21:15:17,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-20 21:15:17,643 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:17,643 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:17,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:17,863 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,SelfDestructingSolverStorable12 [2022-07-20 21:15:17,863 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:17,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:17,864 INFO L85 PathProgramCache]: Analyzing trace with hash 409588504, now seen corresponding path program 6 times [2022-07-20 21:15:17,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:17,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673938118] [2022-07-20 21:15:17,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:17,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:18,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:18,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673938118] [2022-07-20 21:15:18,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673938118] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:18,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666406161] [2022-07-20 21:15:18,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:15:18,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:18,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:18,476 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) [2022-07-20 21:15:18,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 21:15:18,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-20 21:15:18,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:18,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-20 21:15:18,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:18,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 21:15:18,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:15:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 21:15:18,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:18,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:15:18,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-20 21:15:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 21:15:18,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666406161] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:18,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:18,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 32 [2022-07-20 21:15:18,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120273323] [2022-07-20 21:15:18,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:18,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-20 21:15:18,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:18,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-20 21:15:18,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2022-07-20 21:15:18,946 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 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) [2022-07-20 21:15:20,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:20,438 INFO L93 Difference]: Finished difference Result 207 states and 244 transitions. [2022-07-20 21:15:20,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-20 21:15:20,439 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 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 42 [2022-07-20 21:15:20,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:20,440 INFO L225 Difference]: With dead ends: 207 [2022-07-20 21:15:20,441 INFO L226 Difference]: Without dead ends: 185 [2022-07-20 21:15:20,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=686, Invalid=5166, Unknown=0, NotChecked=0, Total=5852 [2022-07-20 21:15:20,443 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 297 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:20,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 256 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 21:15:20,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-20 21:15:20,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 74. [2022-07-20 21:15:20,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 73 states have internal predecessors, (90), 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) [2022-07-20 21:15:20,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2022-07-20 21:15:20,458 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 42 [2022-07-20 21:15:20,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:20,459 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2022-07-20 21:15:20,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 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) [2022-07-20 21:15:20,459 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2022-07-20 21:15:20,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-20 21:15:20,460 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:20,460 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:20,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:20,667 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,SelfDestructingSolverStorable13 [2022-07-20 21:15:20,667 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:20,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:20,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1279355238, now seen corresponding path program 1 times [2022-07-20 21:15:20,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:20,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812723421] [2022-07-20 21:15:20,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:20,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:21,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:21,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812723421] [2022-07-20 21:15:21,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812723421] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:21,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271276356] [2022-07-20 21:15:21,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:21,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:21,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:21,443 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:15:21,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 21:15:21,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:21,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 21:15:21,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:21,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:15:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:15:21,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:21,885 INFO L356 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2022-07-20 21:15:21,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-07-20 21:15:21,909 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 21:15:21,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271276356] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:21,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:21,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 11] total 35 [2022-07-20 21:15:21,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588735296] [2022-07-20 21:15:21,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:21,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-20 21:15:21,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:21,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-20 21:15:21,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2022-07-20 21:15:21,912 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 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) [2022-07-20 21:15:23,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:23,450 INFO L93 Difference]: Finished difference Result 203 states and 248 transitions. [2022-07-20 21:15:23,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-20 21:15:23,451 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 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 42 [2022-07-20 21:15:23,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:23,452 INFO L225 Difference]: With dead ends: 203 [2022-07-20 21:15:23,452 INFO L226 Difference]: Without dead ends: 201 [2022-07-20 21:15:23,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=624, Invalid=4632, Unknown=0, NotChecked=0, Total=5256 [2022-07-20 21:15:23,453 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 256 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:23,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 258 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 21:15:23,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-20 21:15:23,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 63. [2022-07-20 21:15:23,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 62 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) [2022-07-20 21:15:23,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-07-20 21:15:23,470 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 42 [2022-07-20 21:15:23,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:23,470 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-07-20 21:15:23,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 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) [2022-07-20 21:15:23,470 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-07-20 21:15:23,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-20 21:15:23,471 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:23,471 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:23,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:23,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-20 21:15:23,675 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:23,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:23,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1670167694, now seen corresponding path program 7 times [2022-07-20 21:15:23,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:23,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918008179] [2022-07-20 21:15:23,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:23,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 21:15:23,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:23,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918008179] [2022-07-20 21:15:23,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918008179] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:23,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744652062] [2022-07-20 21:15:23,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:15:23,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:23,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:23,767 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:15:23,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 21:15:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:23,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 21:15:23,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 21:15:23,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 21:15:24,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744652062] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:24,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:24,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-20 21:15:24,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051282932] [2022-07-20 21:15:24,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:24,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 21:15:24,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:24,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 21:15:24,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-20 21:15:24,021 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:24,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:24,212 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2022-07-20 21:15:24,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 21:15:24,212 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-20 21:15:24,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:24,213 INFO L225 Difference]: With dead ends: 112 [2022-07-20 21:15:24,213 INFO L226 Difference]: Without dead ends: 74 [2022-07-20 21:15:24,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2022-07-20 21:15:24,214 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 197 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:24,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 78 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:15:24,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-20 21:15:24,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 49. [2022-07-20 21:15:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:24,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-07-20 21:15:24,225 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 46 [2022-07-20 21:15:24,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:24,225 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-07-20 21:15:24,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:24,226 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-07-20 21:15:24,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 21:15:24,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:24,227 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:24,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-20 21:15:24,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-20 21:15:24,439 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:24,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:24,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1173702100, now seen corresponding path program 8 times [2022-07-20 21:15:24,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:24,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113641464] [2022-07-20 21:15:24,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:24,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-20 21:15:24,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:24,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113641464] [2022-07-20 21:15:24,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113641464] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:24,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627564082] [2022-07-20 21:15:24,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:15:24,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:24,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:24,643 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:15:24,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 21:15:24,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:15:24,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:24,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 21:15:24,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 32 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 21:15:24,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 32 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 21:15:25,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627564082] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:25,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:25,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 33 [2022-07-20 21:15:25,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239995478] [2022-07-20 21:15:25,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:25,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-20 21:15:25,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:25,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-20 21:15:25,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 21:15:25,200 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 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) [2022-07-20 21:15:25,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:25,697 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2022-07-20 21:15:25,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 21:15:25,698 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 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 48 [2022-07-20 21:15:25,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:25,698 INFO L225 Difference]: With dead ends: 81 [2022-07-20 21:15:25,698 INFO L226 Difference]: Without dead ends: 60 [2022-07-20 21:15:25,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=385, Invalid=1685, Unknown=0, NotChecked=0, Total=2070 [2022-07-20 21:15:25,699 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 224 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:25,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 102 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:15:25,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-20 21:15:25,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-07-20 21:15:25,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.169811320754717) internal successors, (62), 53 states have internal predecessors, (62), 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) [2022-07-20 21:15:25,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-07-20 21:15:25,712 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 48 [2022-07-20 21:15:25,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:25,712 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-07-20 21:15:25,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 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) [2022-07-20 21:15:25,712 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-07-20 21:15:25,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-20 21:15:25,713 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:25,713 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:25,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:25,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:25,915 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:25,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:25,916 INFO L85 PathProgramCache]: Analyzing trace with hash -49846830, now seen corresponding path program 9 times [2022-07-20 21:15:25,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:25,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748486223] [2022-07-20 21:15:25,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:25,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:25,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-20 21:15:26,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:26,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748486223] [2022-07-20 21:15:26,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748486223] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:26,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699442969] [2022-07-20 21:15:26,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:15:26,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:26,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:26,183 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:15:26,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 21:15:26,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-20 21:15:26,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:26,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 21:15:26,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:26,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:15:26,386 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:15:26,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 21:15:26,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:15:26,533 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 21:15:26,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:26,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:15:26,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-20 21:15:26,701 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 21:15:26,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699442969] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:26,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:26,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2022-07-20 21:15:26,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228361849] [2022-07-20 21:15:26,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:26,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-20 21:15:26,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:26,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-20 21:15:26,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2022-07-20 21:15:26,704 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 29 states have internal predecessors, (103), 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) [2022-07-20 21:15:28,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:28,408 INFO L93 Difference]: Finished difference Result 312 states and 393 transitions. [2022-07-20 21:15:28,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-20 21:15:28,409 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 29 states have internal predecessors, (103), 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 53 [2022-07-20 21:15:28,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:28,410 INFO L225 Difference]: With dead ends: 312 [2022-07-20 21:15:28,410 INFO L226 Difference]: Without dead ends: 265 [2022-07-20 21:15:28,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 91 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=719, Invalid=5287, Unknown=0, NotChecked=0, Total=6006 [2022-07-20 21:15:28,412 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 508 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:28,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 294 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 21:15:28,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-07-20 21:15:28,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 67. [2022-07-20 21:15:28,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.196969696969697) internal successors, (79), 66 states have internal predecessors, (79), 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) [2022-07-20 21:15:28,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-07-20 21:15:28,428 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 53 [2022-07-20 21:15:28,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:28,428 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-07-20 21:15:28,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 29 states have internal predecessors, (103), 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) [2022-07-20 21:15:28,429 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-07-20 21:15:28,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-20 21:15:28,429 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:28,429 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:28,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:28,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-20 21:15:28,649 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:28,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:28,650 INFO L85 PathProgramCache]: Analyzing trace with hash 2124223606, now seen corresponding path program 2 times [2022-07-20 21:15:28,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:28,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169066533] [2022-07-20 21:15:28,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:28,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:29,488 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:29,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:29,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169066533] [2022-07-20 21:15:29,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169066533] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:29,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938739109] [2022-07-20 21:15:29,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:15:29,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:29,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:29,490 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:15:29,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-20 21:15:29,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:15:29,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:29,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-20 21:15:29,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:29,686 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:15:29,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 21:15:29,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:15:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:15:29,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:29,975 INFO L356 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2022-07-20 21:15:29,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-07-20 21:15:30,012 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 21:15:30,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938739109] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:30,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:30,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14, 13] total 35 [2022-07-20 21:15:30,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418974665] [2022-07-20 21:15:30,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:30,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-20 21:15:30,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:30,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-20 21:15:30,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2022-07-20 21:15:30,014 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 35 states, 35 states have (on average 3.2) internal successors, (112), 35 states have internal predecessors, (112), 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) [2022-07-20 21:15:31,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:31,991 INFO L93 Difference]: Finished difference Result 242 states and 318 transitions. [2022-07-20 21:15:31,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-20 21:15:31,991 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.2) internal successors, (112), 35 states have internal predecessors, (112), 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 55 [2022-07-20 21:15:31,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:31,992 INFO L225 Difference]: With dead ends: 242 [2022-07-20 21:15:31,992 INFO L226 Difference]: Without dead ends: 240 [2022-07-20 21:15:31,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 99 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=715, Invalid=5291, Unknown=0, NotChecked=0, Total=6006 [2022-07-20 21:15:31,994 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 487 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:31,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 221 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 21:15:31,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-20 21:15:32,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 60. [2022-07-20 21:15:32,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:32,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2022-07-20 21:15:32,011 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 55 [2022-07-20 21:15:32,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:32,011 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2022-07-20 21:15:32,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.2) internal successors, (112), 35 states have internal predecessors, (112), 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) [2022-07-20 21:15:32,012 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2022-07-20 21:15:32,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-20 21:15:32,012 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:32,012 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:32,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-20 21:15:32,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:32,213 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:32,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:32,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1094429206, now seen corresponding path program 10 times [2022-07-20 21:15:32,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:32,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154091064] [2022-07-20 21:15:32,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:32,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:32,829 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:32,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:32,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154091064] [2022-07-20 21:15:32,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154091064] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:32,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818046585] [2022-07-20 21:15:32,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:15:32,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:32,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:32,831 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:15:32,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-20 21:15:32,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:15:32,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:32,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 21:15:32,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:32,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 21:15:33,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:15:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 21:15:33,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:33,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:15:33,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-20 21:15:33,349 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 21:15:33,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818046585] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:33,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:33,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13, 13] total 34 [2022-07-20 21:15:33,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565219439] [2022-07-20 21:15:33,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:33,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-20 21:15:33,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:33,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-20 21:15:33,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2022-07-20 21:15:33,351 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 34 states have internal predecessors, (107), 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) [2022-07-20 21:15:39,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:39,786 INFO L93 Difference]: Finished difference Result 487 states and 643 transitions. [2022-07-20 21:15:39,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2022-07-20 21:15:39,786 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 34 states have internal predecessors, (107), 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 59 [2022-07-20 21:15:39,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:39,787 INFO L225 Difference]: With dead ends: 487 [2022-07-20 21:15:39,788 INFO L226 Difference]: Without dead ends: 485 [2022-07-20 21:15:39,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 104 SyntacticMatches, 5 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13657 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3339, Invalid=31817, Unknown=0, NotChecked=0, Total=35156 [2022-07-20 21:15:39,793 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1936 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 1573 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1936 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 3054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1573 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:39,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1936 Valid, 309 Invalid, 3054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1573 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-20 21:15:39,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-07-20 21:15:39,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 73. [2022-07-20 21:15:39,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1944444444444444) internal successors, (86), 72 states have internal predecessors, (86), 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) [2022-07-20 21:15:39,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2022-07-20 21:15:39,819 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 59 [2022-07-20 21:15:39,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:39,819 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2022-07-20 21:15:39,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 34 states have internal predecessors, (107), 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) [2022-07-20 21:15:39,820 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2022-07-20 21:15:39,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-20 21:15:39,820 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:39,820 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:39,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:40,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:40,021 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:40,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:40,021 INFO L85 PathProgramCache]: Analyzing trace with hash 828798828, now seen corresponding path program 2 times [2022-07-20 21:15:40,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:40,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454171697] [2022-07-20 21:15:40,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:40,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:40,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:40,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:40,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454171697] [2022-07-20 21:15:40,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454171697] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:40,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396443746] [2022-07-20 21:15:40,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:15:40,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:40,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:40,722 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:15:40,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-20 21:15:40,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:15:40,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:40,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-20 21:15:40,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:41,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:15:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:15:41,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:41,226 INFO L356 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2022-07-20 21:15:41,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-07-20 21:15:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 21:15:41,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396443746] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:41,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:41,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 16, 14] total 39 [2022-07-20 21:15:41,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906587574] [2022-07-20 21:15:41,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:41,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-20 21:15:41,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:41,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-20 21:15:41,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1345, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 21:15:41,256 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 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) [2022-07-20 21:15:44,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:44,698 INFO L93 Difference]: Finished difference Result 477 states and 633 transitions. [2022-07-20 21:15:44,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-07-20 21:15:44,698 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 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 59 [2022-07-20 21:15:44,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:44,700 INFO L225 Difference]: With dead ends: 477 [2022-07-20 21:15:44,700 INFO L226 Difference]: Without dead ends: 475 [2022-07-20 21:15:44,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4282 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1576, Invalid=12230, Unknown=0, NotChecked=0, Total=13806 [2022-07-20 21:15:44,702 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1240 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 1016 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1240 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 2465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1016 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:44,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1240 Valid, 247 Invalid, 2465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1016 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-20 21:15:44,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-07-20 21:15:44,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 64. [2022-07-20 21:15:44,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 63 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) [2022-07-20 21:15:44,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2022-07-20 21:15:44,722 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 59 [2022-07-20 21:15:44,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:44,723 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2022-07-20 21:15:44,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 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) [2022-07-20 21:15:44,723 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2022-07-20 21:15:44,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-20 21:15:44,723 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:44,723 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:44,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:44,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:44,924 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:44,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:44,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2140830112, now seen corresponding path program 11 times [2022-07-20 21:15:44,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:44,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484089022] [2022-07-20 21:15:44,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:44,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 51 proven. 57 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 21:15:45,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:45,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484089022] [2022-07-20 21:15:45,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484089022] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:45,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507477459] [2022-07-20 21:15:45,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:15:45,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:45,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:45,046 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:15:45,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-20 21:15:45,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-20 21:15:45,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:45,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 21:15:45,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 72 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 21:15:45,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 72 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 21:15:45,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507477459] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:45,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:45,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-20 21:15:45,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147459767] [2022-07-20 21:15:45,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:45,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 21:15:45,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:45,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 21:15:45,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-07-20 21:15:45,541 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 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) [2022-07-20 21:15:45,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:45,790 INFO L93 Difference]: Finished difference Result 176 states and 206 transitions. [2022-07-20 21:15:45,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-20 21:15:45,791 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 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 63 [2022-07-20 21:15:45,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:45,791 INFO L225 Difference]: With dead ends: 176 [2022-07-20 21:15:45,791 INFO L226 Difference]: Without dead ends: 97 [2022-07-20 21:15:45,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=307, Invalid=953, Unknown=0, NotChecked=0, Total=1260 [2022-07-20 21:15:45,793 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 228 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:45,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 103 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:15:45,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-20 21:15:45,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 66. [2022-07-20 21:15:45,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 65 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) [2022-07-20 21:15:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2022-07-20 21:15:45,813 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 63 [2022-07-20 21:15:45,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:45,813 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2022-07-20 21:15:45,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 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) [2022-07-20 21:15:45,814 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2022-07-20 21:15:45,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 21:15:45,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:45,814 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:45,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-20 21:15:46,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:46,035 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:46,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:46,036 INFO L85 PathProgramCache]: Analyzing trace with hash -771049342, now seen corresponding path program 12 times [2022-07-20 21:15:46,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:46,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102135863] [2022-07-20 21:15:46,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:46,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 25 proven. 42 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-20 21:15:46,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:46,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102135863] [2022-07-20 21:15:46,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102135863] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:46,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259051261] [2022-07-20 21:15:46,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:15:46,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:46,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:46,289 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:15:46,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-20 21:15:46,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-20 21:15:46,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:46,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 21:15:46,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 36 proven. 31 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-20 21:15:46,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 49 proven. 18 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-20 21:15:47,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259051261] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:47,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:47,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-07-20 21:15:47,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952073536] [2022-07-20 21:15:47,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:47,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-20 21:15:47,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:47,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-20 21:15:47,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2022-07-20 21:15:47,359 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 40 states, 40 states have (on average 2.825) internal successors, (113), 40 states have internal predecessors, (113), 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) [2022-07-20 21:15:47,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:47,834 INFO L93 Difference]: Finished difference Result 112 states and 128 transitions. [2022-07-20 21:15:47,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 21:15:47,835 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.825) internal successors, (113), 40 states have internal predecessors, (113), 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 65 [2022-07-20 21:15:47,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:47,835 INFO L225 Difference]: With dead ends: 112 [2022-07-20 21:15:47,835 INFO L226 Difference]: Without dead ends: 83 [2022-07-20 21:15:47,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=640, Invalid=1910, Unknown=0, NotChecked=0, Total=2550 [2022-07-20 21:15:47,836 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 314 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:47,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 121 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 21:15:47,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-20 21:15:47,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 71. [2022-07-20 21:15:47,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 70 states have internal predecessors, (81), 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) [2022-07-20 21:15:47,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2022-07-20 21:15:47,853 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 65 [2022-07-20 21:15:47,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:47,853 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2022-07-20 21:15:47,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.825) internal successors, (113), 40 states have internal predecessors, (113), 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) [2022-07-20 21:15:47,853 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2022-07-20 21:15:47,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-20 21:15:47,854 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:47,854 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:47,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:48,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-20 21:15:48,055 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:48,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:48,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1827931244, now seen corresponding path program 13 times [2022-07-20 21:15:48,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:48,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131132505] [2022-07-20 21:15:48,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:48,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:48,406 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 23 proven. 60 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-20 21:15:48,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:48,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131132505] [2022-07-20 21:15:48,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131132505] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:48,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457326395] [2022-07-20 21:15:48,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:15:48,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:48,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:48,412 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:15:48,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-20 21:15:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:48,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 21:15:48,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 34 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-20 21:15:48,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 34 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-20 21:15:49,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457326395] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:49,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:49,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 43 [2022-07-20 21:15:49,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886546982] [2022-07-20 21:15:49,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:49,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-20 21:15:49,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:49,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-20 21:15:49,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1422, Unknown=0, NotChecked=0, Total=1806 [2022-07-20 21:15:49,141 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 43 states, 43 states have (on average 2.7674418604651163) internal successors, (119), 43 states have internal predecessors, (119), 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) [2022-07-20 21:15:49,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:49,553 INFO L93 Difference]: Finished difference Result 136 states and 156 transitions. [2022-07-20 21:15:49,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 21:15:49,554 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.7674418604651163) internal successors, (119), 43 states have internal predecessors, (119), 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 70 [2022-07-20 21:15:49,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:49,554 INFO L225 Difference]: With dead ends: 136 [2022-07-20 21:15:49,554 INFO L226 Difference]: Without dead ends: 83 [2022-07-20 21:15:49,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=568, Invalid=1882, Unknown=0, NotChecked=0, Total=2450 [2022-07-20 21:15:49,557 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 241 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:49,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 96 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:15:49,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-20 21:15:49,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2022-07-20 21:15:49,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 72 states have internal predecessors, (83), 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) [2022-07-20 21:15:49,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-07-20 21:15:49,587 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 70 [2022-07-20 21:15:49,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:49,588 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-07-20 21:15:49,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.7674418604651163) internal successors, (119), 43 states have internal predecessors, (119), 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) [2022-07-20 21:15:49,588 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-07-20 21:15:49,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-20 21:15:49,589 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:49,589 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:49,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:49,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-20 21:15:49,815 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:49,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:49,815 INFO L85 PathProgramCache]: Analyzing trace with hash -730693838, now seen corresponding path program 14 times [2022-07-20 21:15:49,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:49,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544278261] [2022-07-20 21:15:49,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:49,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:50,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:50,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544278261] [2022-07-20 21:15:50,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544278261] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:50,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631651035] [2022-07-20 21:15:50,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:15:50,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:50,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:50,572 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:15:50,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-20 21:15:50,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:15:50,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:50,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-20 21:15:50,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:50,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:15:50,792 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:15:50,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 21:15:51,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:15:51,036 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-20 21:15:51,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:51,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:15:51,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-20 21:15:51,242 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-20 21:15:51,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631651035] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:51,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:51,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15, 15] total 39 [2022-07-20 21:15:51,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526717004] [2022-07-20 21:15:51,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:51,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-20 21:15:51,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:51,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-20 21:15:51,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 21:15:51,243 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 39 states, 39 states have (on average 3.3846153846153846) internal successors, (132), 39 states have internal predecessors, (132), 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) [2022-07-20 21:16:04,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:16:04,850 INFO L93 Difference]: Finished difference Result 870 states and 1182 transitions. [2022-07-20 21:16:04,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2022-07-20 21:16:04,850 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.3846153846153846) internal successors, (132), 39 states have internal predecessors, (132), 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 72 [2022-07-20 21:16:04,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:16:04,854 INFO L225 Difference]: With dead ends: 870 [2022-07-20 21:16:04,854 INFO L226 Difference]: Without dead ends: 868 [2022-07-20 21:16:04,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 130 SyntacticMatches, 5 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41395 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=5797, Invalid=95645, Unknown=0, NotChecked=0, Total=101442 [2022-07-20 21:16:04,861 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 4042 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 2270 mSolverCounterSat, 3277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4042 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 5547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3277 IncrementalHoareTripleChecker+Valid, 2270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:16:04,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4042 Valid, 478 Invalid, 5547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3277 Valid, 2270 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 21:16:04,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-07-20 21:16:04,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 84. [2022-07-20 21:16:04,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.180722891566265) internal successors, (98), 83 states have internal predecessors, (98), 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) [2022-07-20 21:16:04,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2022-07-20 21:16:04,897 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 72 [2022-07-20 21:16:04,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:16:04,897 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2022-07-20 21:16:04,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.3846153846153846) internal successors, (132), 39 states have internal predecessors, (132), 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) [2022-07-20 21:16:04,898 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2022-07-20 21:16:04,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-20 21:16:04,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:16:04,898 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:16:04,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-20 21:16:05,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:16:05,099 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:16:05,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:16:05,099 INFO L85 PathProgramCache]: Analyzing trace with hash -803080396, now seen corresponding path program 3 times [2022-07-20 21:16:05,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:16:05,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747395255] [2022-07-20 21:16:05,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:16:05,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:16:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:16:06,027 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:06,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:16:06,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747395255] [2022-07-20 21:16:06,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747395255] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:16:06,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177136667] [2022-07-20 21:16:06,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:16:06,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:16:06,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:16:06,029 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:16:06,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-20 21:16:06,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-20 21:16:06,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:16:06,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-20 21:16:06,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:16:06,391 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:16:06,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 21:16:06,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:16:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-20 21:16:06,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:16:06,751 INFO L356 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2022-07-20 21:16:06,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-07-20 21:16:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-20 21:16:06,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177136667] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:16:06,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:16:06,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 16] total 42 [2022-07-20 21:16:06,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699848941] [2022-07-20 21:16:06,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:16:06,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-20 21:16:06,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:16:06,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-20 21:16:06,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1571, Unknown=0, NotChecked=0, Total=1722 [2022-07-20 21:16:06,802 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 42 states, 42 states have (on average 3.1666666666666665) internal successors, (133), 42 states have internal predecessors, (133), 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) [2022-07-20 21:16:13,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:16:13,287 INFO L93 Difference]: Finished difference Result 860 states and 1172 transitions. [2022-07-20 21:16:13,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-07-20 21:16:13,288 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.1666666666666665) internal successors, (133), 42 states have internal predecessors, (133), 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 72 [2022-07-20 21:16:13,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:16:13,293 INFO L225 Difference]: With dead ends: 860 [2022-07-20 21:16:13,293 INFO L226 Difference]: Without dead ends: 858 [2022-07-20 21:16:13,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 133 SyntacticMatches, 6 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10971 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2554, Invalid=29308, Unknown=0, NotChecked=0, Total=31862 [2022-07-20 21:16:13,295 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2078 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 2016 mSolverCounterSat, 1774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2078 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 3790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1774 IncrementalHoareTripleChecker+Valid, 2016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:16:13,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2078 Valid, 341 Invalid, 3790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1774 Valid, 2016 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-20 21:16:13,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-07-20 21:16:13,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 77. [2022-07-20 21:16:13,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.144736842105263) internal successors, (87), 76 states have internal predecessors, (87), 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) [2022-07-20 21:16:13,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2022-07-20 21:16:13,327 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 72 [2022-07-20 21:16:13,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:16:13,327 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2022-07-20 21:16:13,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.1666666666666665) internal successors, (133), 42 states have internal predecessors, (133), 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) [2022-07-20 21:16:13,327 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2022-07-20 21:16:13,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-20 21:16:13,328 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:16:13,328 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:16:13,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-20 21:16:13,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:16:13,535 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:16:13,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:16:13,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1422773160, now seen corresponding path program 15 times [2022-07-20 21:16:13,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:16:13,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270478404] [2022-07-20 21:16:13,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:16:13,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:16:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:16:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:14,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:16:14,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270478404] [2022-07-20 21:16:14,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270478404] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:16:14,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907042501] [2022-07-20 21:16:14,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:16:14,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:16:14,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:16:14,322 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:16:14,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-20 21:16:14,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-20 21:16:14,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:16:14,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-20 21:16:14,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:16:14,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 21:16:14,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:16:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-20 21:16:14,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:16:15,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:16:15,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-20 21:16:15,164 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-20 21:16:15,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907042501] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:16:15,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:16:15,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 16, 16] total 42 [2022-07-20 21:16:15,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430666304] [2022-07-20 21:16:15,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:16:15,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-20 21:16:15,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:16:15,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-20 21:16:15,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1583, Unknown=0, NotChecked=0, Total=1722 [2022-07-20 21:16:15,167 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 42 states, 42 states have (on average 3.261904761904762) internal successors, (137), 42 states have internal predecessors, (137), 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) [2022-07-20 21:16:43,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:16:43,370 INFO L93 Difference]: Finished difference Result 1723 states and 2355 transitions. [2022-07-20 21:16:43,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 581 states. [2022-07-20 21:16:43,370 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.261904761904762) internal successors, (137), 42 states have internal predecessors, (137), 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 76 [2022-07-20 21:16:43,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:16:43,376 INFO L225 Difference]: With dead ends: 1723 [2022-07-20 21:16:43,376 INFO L226 Difference]: Without dead ends: 1721 [2022-07-20 21:16:43,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 136 SyntacticMatches, 4 SemanticMatches, 608 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170674 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=21662, Invalid=349828, Unknown=0, NotChecked=0, Total=371490 [2022-07-20 21:16:43,397 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 8439 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 2507 mSolverCounterSat, 7062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8439 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 9569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7062 IncrementalHoareTripleChecker+Valid, 2507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:16:43,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8439 Valid, 474 Invalid, 9569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7062 Valid, 2507 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-07-20 21:16:43,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-07-20 21:16:43,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 90. [2022-07-20 21:16:43,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 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) [2022-07-20 21:16:43,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2022-07-20 21:16:43,507 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 76 [2022-07-20 21:16:43,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:16:43,507 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2022-07-20 21:16:43,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.261904761904762) internal successors, (137), 42 states have internal predecessors, (137), 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) [2022-07-20 21:16:43,508 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2022-07-20 21:16:43,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-20 21:16:43,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:16:43,508 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:16:43,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-20 21:16:43,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-20 21:16:43,723 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:16:43,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:16:43,724 INFO L85 PathProgramCache]: Analyzing trace with hash 578767658, now seen corresponding path program 3 times [2022-07-20 21:16:43,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:16:43,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398182887] [2022-07-20 21:16:43,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:16:43,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:16:43,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:16:44,854 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:44,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:16:44,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398182887] [2022-07-20 21:16:44,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398182887] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:16:44,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753725440] [2022-07-20 21:16:44,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:16:44,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:16:44,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:16:44,857 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:16:44,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-20 21:16:45,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-20 21:16:45,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:16:45,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-20 21:16:45,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:16:45,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:16:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-20 21:16:45,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:16:45,811 INFO L356 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2022-07-20 21:16:45,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-07-20 21:16:45,845 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-20 21:16:45,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753725440] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:16:45,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:16:45,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 17, 17] total 45 [2022-07-20 21:16:45,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746391800] [2022-07-20 21:16:45,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:16:45,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-20 21:16:45,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:16:45,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-20 21:16:45,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1817, Unknown=0, NotChecked=0, Total=1980 [2022-07-20 21:16:45,846 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand has 45 states, 45 states have (on average 3.088888888888889) internal successors, (139), 45 states have internal predecessors, (139), 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) [2022-07-20 21:16:58,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:16:58,558 INFO L93 Difference]: Finished difference Result 1713 states and 2345 transitions. [2022-07-20 21:16:58,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-07-20 21:16:58,559 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.088888888888889) internal successors, (139), 45 states have internal predecessors, (139), 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 76 [2022-07-20 21:16:58,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:16:58,563 INFO L225 Difference]: With dead ends: 1713 [2022-07-20 21:16:58,563 INFO L226 Difference]: Without dead ends: 1711 [2022-07-20 21:16:58,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 138 SyntacticMatches, 7 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38970 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=7347, Invalid=87825, Unknown=0, NotChecked=0, Total=95172 [2022-07-20 21:16:58,568 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 4202 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 2710 mSolverCounterSat, 3541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4202 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 6251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3541 IncrementalHoareTripleChecker+Valid, 2710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:16:58,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4202 Valid, 421 Invalid, 6251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3541 Valid, 2710 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-20 21:16:58,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2022-07-20 21:16:58,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 81. [2022-07-20 21:16:58,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1375) internal successors, (91), 80 states have internal predecessors, (91), 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) [2022-07-20 21:16:58,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2022-07-20 21:16:58,621 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 76 [2022-07-20 21:16:58,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:16:58,622 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2022-07-20 21:16:58,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.088888888888889) internal successors, (139), 45 states have internal predecessors, (139), 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) [2022-07-20 21:16:58,622 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2022-07-20 21:16:58,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-20 21:16:58,622 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:16:58,623 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:16:58,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-20 21:16:58,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-20 21:16:58,844 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:16:58,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:16:58,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1696722206, now seen corresponding path program 16 times [2022-07-20 21:16:58,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:16:58,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506593677] [2022-07-20 21:16:58,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:16:58,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:16:58,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:16:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 99 proven. 93 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 21:16:59,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:16:59,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506593677] [2022-07-20 21:16:59,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506593677] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:16:59,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710823830] [2022-07-20 21:16:59,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:16:59,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:16:59,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:16:59,021 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:16:59,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-20 21:16:59,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:16:59,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:16:59,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 21:16:59,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:16:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 128 proven. 64 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 21:16:59,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:16:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 128 proven. 64 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 21:16:59,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710823830] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:16:59,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:16:59,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-07-20 21:16:59,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792889751] [2022-07-20 21:16:59,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:16:59,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-20 21:16:59,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:16:59,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-20 21:16:59,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2022-07-20 21:16:59,500 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 32 states, 32 states have (on average 3.34375) internal successors, (107), 32 states have internal predecessors, (107), 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) [2022-07-20 21:16:59,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:16:59,969 INFO L93 Difference]: Finished difference Result 220 states and 257 transitions. [2022-07-20 21:16:59,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-20 21:16:59,969 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.34375) internal successors, (107), 32 states have internal predecessors, (107), 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 80 [2022-07-20 21:16:59,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:16:59,970 INFO L225 Difference]: With dead ends: 220 [2022-07-20 21:16:59,970 INFO L226 Difference]: Without dead ends: 120 [2022-07-20 21:16:59,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=466, Invalid=1514, Unknown=0, NotChecked=0, Total=1980 [2022-07-20 21:16:59,971 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 396 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:16:59,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 162 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 21:16:59,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-20 21:17:00,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 83. [2022-07-20 21:17:00,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 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) [2022-07-20 21:17:00,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2022-07-20 21:17:00,007 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 80 [2022-07-20 21:17:00,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:17:00,007 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2022-07-20 21:17:00,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.34375) internal successors, (107), 32 states have internal predecessors, (107), 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) [2022-07-20 21:17:00,008 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2022-07-20 21:17:00,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-20 21:17:00,008 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:17:00,009 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:17:00,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-20 21:17:00,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-20 21:17:00,217 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:17:00,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:17:00,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1951988932, now seen corresponding path program 17 times [2022-07-20 21:17:00,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:17:00,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708919596] [2022-07-20 21:17:00,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:17:00,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:17:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:17:00,572 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 49 proven. 66 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-20 21:17:00,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:17:00,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708919596] [2022-07-20 21:17:00,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708919596] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:17:00,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036323913] [2022-07-20 21:17:00,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:17:00,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:17:00,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:17:00,575 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:17:00,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-20 21:17:00,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-20 21:17:00,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:17:00,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 21:17:00,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:17:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 64 proven. 51 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-20 21:17:01,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:17:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 81 proven. 34 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-20 21:17:01,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036323913] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:17:01,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:17:01,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 49 [2022-07-20 21:17:01,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498778507] [2022-07-20 21:17:01,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:17:01,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-20 21:17:01,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:17:01,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-20 21:17:01,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=1864, Unknown=0, NotChecked=0, Total=2352 [2022-07-20 21:17:01,951 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 49 states have internal predecessors, (140), 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) [2022-07-20 21:17:02,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:17:02,683 INFO L93 Difference]: Finished difference Result 143 states and 164 transitions. [2022-07-20 21:17:02,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-20 21:17:02,683 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 49 states have internal predecessors, (140), 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 82 [2022-07-20 21:17:02,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:17:02,684 INFO L225 Difference]: With dead ends: 143 [2022-07-20 21:17:02,684 INFO L226 Difference]: Without dead ends: 106 [2022-07-20 21:17:02,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=907, Invalid=2999, Unknown=0, NotChecked=0, Total=3906 [2022-07-20 21:17:02,685 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 496 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:17:02,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 149 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 21:17:02,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-20 21:17:02,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2022-07-20 21:17:02,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 87 states have internal predecessors, (100), 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) [2022-07-20 21:17:02,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2022-07-20 21:17:02,730 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 82 [2022-07-20 21:17:02,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:17:02,731 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2022-07-20 21:17:02,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 49 states have internal predecessors, (140), 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) [2022-07-20 21:17:02,731 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2022-07-20 21:17:02,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-20 21:17:02,731 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:17:02,731 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:17:02,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-20 21:17:02,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:17:02,932 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:17:02,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:17:02,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1954581362, now seen corresponding path program 18 times [2022-07-20 21:17:02,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:17:02,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491546228] [2022-07-20 21:17:02,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:17:02,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:17:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:17:03,375 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 39 proven. 97 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-20 21:17:03,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:17:03,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491546228] [2022-07-20 21:17:03,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491546228] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:17:03,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855023756] [2022-07-20 21:17:03,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:17:03,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:17:03,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:17:03,377 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:17:03,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-20 21:17:03,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-20 21:17:03,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:17:03,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 21:17:03,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:17:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 55 proven. 81 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-20 21:17:04,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:17:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 55 proven. 81 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-20 21:17:04,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855023756] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:17:04,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:17:04,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 52 [2022-07-20 21:17:04,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922276506] [2022-07-20 21:17:04,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:17:04,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-20 21:17:04,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:17:04,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-20 21:17:04,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=2105, Unknown=0, NotChecked=0, Total=2652 [2022-07-20 21:17:04,840 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand has 52 states, 52 states have (on average 2.8076923076923075) internal successors, (146), 52 states have internal predecessors, (146), 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) [2022-07-20 21:17:05,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:17:05,332 INFO L93 Difference]: Finished difference Result 166 states and 190 transitions. [2022-07-20 21:17:05,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-20 21:17:05,332 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.8076923076923075) internal successors, (146), 52 states have internal predecessors, (146), 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 87 [2022-07-20 21:17:05,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:17:05,333 INFO L225 Difference]: With dead ends: 166 [2022-07-20 21:17:05,333 INFO L226 Difference]: Without dead ends: 100 [2022-07-20 21:17:05,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=804, Invalid=2736, Unknown=0, NotChecked=0, Total=3540 [2022-07-20 21:17:05,334 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 298 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:17:05,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 88 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 21:17:05,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-20 21:17:05,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2022-07-20 21:17:05,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.146067415730337) internal successors, (102), 89 states have internal predecessors, (102), 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) [2022-07-20 21:17:05,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2022-07-20 21:17:05,437 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 87 [2022-07-20 21:17:05,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:17:05,438 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2022-07-20 21:17:05,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.8076923076923075) internal successors, (146), 52 states have internal predecessors, (146), 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) [2022-07-20 21:17:05,438 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2022-07-20 21:17:05,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-20 21:17:05,439 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:17:05,439 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:17:05,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-20 21:17:05,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:17:05,663 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:17:05,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:17:05,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1687811988, now seen corresponding path program 19 times [2022-07-20 21:17:05,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:17:05,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320976100] [2022-07-20 21:17:05,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:17:05,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:17:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:17:06,942 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 36 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:17:06,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:17:06,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320976100] [2022-07-20 21:17:06,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320976100] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:17:06,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211325552] [2022-07-20 21:17:06,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:17:06,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:17:06,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:17:06,944 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:17:06,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-20 21:17:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:17:07,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 21:17:07,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:17:07,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:17:07,254 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:17:07,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 21:17:07,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:17:07,679 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-20 21:17:07,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:17:08,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:17:08,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-20 21:17:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-20 21:17:08,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211325552] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:17:08,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:17:08,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 18, 18] total 57 [2022-07-20 21:17:08,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595736966] [2022-07-20 21:17:08,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:17:08,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-20 21:17:08,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:17:08,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-20 21:17:08,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2996, Unknown=0, NotChecked=0, Total=3192 [2022-07-20 21:17:08,217 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand has 57 states, 57 states have (on average 3.4035087719298245) internal successors, (194), 57 states have internal predecessors, (194), 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) [2022-07-20 21:17:43,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:17:43,919 INFO L93 Difference]: Finished difference Result 1843 states and 2547 transitions. [2022-07-20 21:17:43,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 528 states. [2022-07-20 21:17:43,920 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.4035087719298245) internal successors, (194), 57 states have internal predecessors, (194), 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 89 [2022-07-20 21:17:43,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:17:43,924 INFO L225 Difference]: With dead ends: 1843 [2022-07-20 21:17:43,924 INFO L226 Difference]: Without dead ends: 1841 [2022-07-20 21:17:43,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 151 SyntacticMatches, 5 SemanticMatches, 576 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138791 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=22295, Invalid=311211, Unknown=0, NotChecked=0, Total=333506 [2022-07-20 21:17:43,937 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 6929 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 3912 mSolverCounterSat, 6051 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6929 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 9963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6051 IncrementalHoareTripleChecker+Valid, 3912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:17:43,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6929 Valid, 801 Invalid, 9963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6051 Valid, 3912 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-07-20 21:17:43,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2022-07-20 21:17:43,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 101. [2022-07-20 21:17:43,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.17) internal successors, (117), 100 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:17:43,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 117 transitions. [2022-07-20 21:17:43,995 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 117 transitions. Word has length 89 [2022-07-20 21:17:43,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:17:43,996 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 117 transitions. [2022-07-20 21:17:43,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.4035087719298245) internal successors, (194), 57 states have internal predecessors, (194), 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) [2022-07-20 21:17:43,996 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 117 transitions. [2022-07-20 21:17:43,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-20 21:17:43,996 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:17:43,996 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:17:44,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-07-20 21:17:44,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:17:44,197 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:17:44,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:17:44,197 INFO L85 PathProgramCache]: Analyzing trace with hash 2111458710, now seen corresponding path program 4 times [2022-07-20 21:17:44,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:17:44,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452453953] [2022-07-20 21:17:44,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:17:44,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:17:44,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:17:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:17:45,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:17:45,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452453953] [2022-07-20 21:17:45,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452453953] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:17:45,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674651378] [2022-07-20 21:17:45,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:17:45,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:17:45,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:17:45,388 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:17:45,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-20 21:17:45,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:17:45,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:17:45,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-20 21:17:45,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:17:45,695 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:17:45,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 21:17:45,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:17:46,016 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-20 21:17:46,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:17:46,165 INFO L356 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2022-07-20 21:17:46,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-07-20 21:17:46,306 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-20 21:17:46,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674651378] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:17:46,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:17:46,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 19, 19] total 50 [2022-07-20 21:17:46,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249372516] [2022-07-20 21:17:46,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:17:46,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-20 21:17:46,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:17:46,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-20 21:17:46,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2266, Unknown=0, NotChecked=0, Total=2450 [2022-07-20 21:17:46,308 INFO L87 Difference]: Start difference. First operand 101 states and 117 transitions. Second operand has 50 states, 50 states have (on average 3.26) internal successors, (163), 50 states have internal predecessors, (163), 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) [2022-07-20 21:18:14,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:18:14,978 INFO L93 Difference]: Finished difference Result 3212 states and 4476 transitions. [2022-07-20 21:18:14,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 486 states. [2022-07-20 21:18:14,979 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.26) internal successors, (163), 50 states have internal predecessors, (163), 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 89 [2022-07-20 21:18:14,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:18:14,985 INFO L225 Difference]: With dead ends: 3212 [2022-07-20 21:18:14,986 INFO L226 Difference]: Without dead ends: 3210 [2022-07-20 21:18:14,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 163 SyntacticMatches, 9 SemanticMatches, 522 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117650 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=12227, Invalid=261825, Unknown=0, NotChecked=0, Total=274052 [2022-07-20 21:18:14,996 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 9975 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 3625 mSolverCounterSat, 7979 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9975 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 11604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7979 IncrementalHoareTripleChecker+Valid, 3625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:18:14,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9975 Valid, 615 Invalid, 11604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7979 Valid, 3625 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-07-20 21:18:14,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2022-07-20 21:18:15,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 94. [2022-07-20 21:18:15,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 93 states have internal predecessors, (106), 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) [2022-07-20 21:18:15,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 106 transitions. [2022-07-20 21:18:15,083 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 106 transitions. Word has length 89 [2022-07-20 21:18:15,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:18:15,084 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 106 transitions. [2022-07-20 21:18:15,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.26) internal successors, (163), 50 states have internal predecessors, (163), 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) [2022-07-20 21:18:15,084 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 106 transitions. [2022-07-20 21:18:15,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-20 21:18:15,085 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:18:15,085 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:18:15,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-20 21:18:15,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-20 21:18:15,309 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:18:15,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:18:15,310 INFO L85 PathProgramCache]: Analyzing trace with hash 433996554, now seen corresponding path program 20 times [2022-07-20 21:18:15,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:18:15,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335427464] [2022-07-20 21:18:15,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:18:15,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:18:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:18:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:18:16,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:18:16,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335427464] [2022-07-20 21:18:16,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335427464] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:18:16,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314495814] [2022-07-20 21:18:16,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:18:16,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:18:16,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:18:16,318 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:18:16,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-20 21:18:16,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:18:16,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:18:16,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 21:18:16,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:18:16,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 21:18:16,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:18:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-20 21:18:16,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:18:17,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:18:17,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-20 21:18:17,122 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-20 21:18:17,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314495814] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:18:17,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:18:17,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 19, 19] total 50 [2022-07-20 21:18:17,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662529110] [2022-07-20 21:18:17,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:18:17,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-20 21:18:17,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:18:17,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-20 21:18:17,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2281, Unknown=0, NotChecked=0, Total=2450 [2022-07-20 21:18:17,124 INFO L87 Difference]: Start difference. First operand 94 states and 106 transitions. Second operand has 50 states, 50 states have (on average 3.34) internal successors, (167), 50 states have internal predecessors, (167), 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)